How to configure OpenWrt as Firewall for your home network and Guest Wifi and IPTables explained

[@JB-tz9pi]

You definitely have some of the best videos I have come across on OpenWRT.

[@OneMarcFifty]

Wow, thanks!

[@TorgeirThoresen]

Still true! Great stuff.

[@eugrus]

Yeah! Far less KZbin content on OpenWRT than on pfSense. Marc is a blessing!

[@francescopocci2201]

Hey man, are you a teacher?! This video is the one that I was looking for and Your explanations are GREAT! OpenWrt is not that simple (and the wiki is confusing IMO) but you make things easier. Keep it up, please !

[@OneMarcFifty]

Hi Francesco, no I am not a teacher 😉, I just love to explain things - all I’m doing on this channel is that I share my own learnings really.

[@hondokenway]

I came across your videos today. Ive been wanting to get into more networking and your videos have given me the confidence to fianlly make the step. Going flash openwrt soon and get the ball rolling. Thank you for the time and effort you have put into these videos

[@ColinReddig]

This is such an incredibly helpful video for newcomers to OpenWRT. Very high quality an informative. The way you explain things is so clear. Thank you!

[@OneMarcFifty]

Many thanks Colin !

[@syt3d]

great video, clear and amazingly helpful. in openwrt 22.03.5, the "bridge interfaces" checkbox in the "add new interface" menu is no longer there, is there something i need to do in this version to acheive the same thing?

[@tidico]

They moved the functionality to the "devices" tab in Network > Interfaces. Create a new device. Select "bridge interface" in interface type and select the port/vlan you want.

[@jaromanda]

OMG! Your explanation of the firewall in OpenWRT was the final piece in the puzzle for me - it all clicked with this video, thank you

[@OneMarcFifty]

Awesome - I am glad it helped ;-)

[@LeoGitarzysta]

Kudos. Very informative video and without substantive errors on the topic, and showing the proper understanding of underlying mechanisms This is the proper way in which OpenWrt configuration should be explained.

[@OneMarcFifty]

Many thanks for your friendly feedback!!!

[@harrytsang1501]

Thanks for the useful diagram. Picking up OpenWRT compatible routers for $5 in the second hand market is one of my best decisions made as I can now use them as dedicated firewalls for my IoT devices even if the rest of the network runs on newer consumer grade hardware I have it in reverse where I have a mix of consumer grade router with stock firmware, dd-wrt and openwrt. The Stock firmware one has the best wifi so it stays in the center. One cable to another room is a DD-wrt box acting as an unmanaged switch with full gigabit speed, and one of the port is connected to a 100Mbps OpenWRT router with LAN firewall configured to be as strict as guest network for IoT devices only. It works great and I like the peace of mind that IoT devices cannot ping my computers Edit: I found out my DD-wrt box also supports OpenWRT and the firewall does not affect the unmanaged gigabit speed of the switch. Unified them to one device and added wireguard functionality

[@MrOlegrom]

Thank you very much for the video. It's a pitty, it is outdated. I cannot follow with the video, because in the new openwrt version things are different, starting with creating interfaces. Is it possible to update the instructions?

[@ClintonWBlackmore]

I've been needing this video for months. I've found OpenWRT to be so confusing. This is explaining exactly what I wanted to know. Thank you so much.

[@goppinaththurairajah760]

Simple and effective explanation by covering the audience from beginners to advanced.

[@OneMarcFifty]

Thank you very much for your feedback ;-)

[@PankajSharma-ir7fb]

Best set up video for beginner to achieve a perfect network settings with full understanding of how the os does this.

[@stbhg680p9]

i'm from indonesia, i didnt speak english well, need more focus to understand what the meaning of so i've watch this video again and again great job, thank for your explaining video

[@OneMarcFifty]

Hi, many thanks for your feedback. Please check out the subtitles. You should be able to use automatic translation to Indonesian.

[@sanyr80]

Thanks, this was really helpful. Your explanations gave me enough info to be able to tailor everything to my own needs without being completely lost. The screens shown are a little out of date for the latest version of OpenWrt but are still quite usable.

[@OneMarcFifty]

Hi, many thanks for the feedback - there's newer videos on OpenWrt 21 on my channel https:/kzbin.info

[@OneMarcFifty]

Please visit my channel page: kzbin.info Want to talk to me? Join my Discord Server: discord.com/invite/DXnfBUG

[@colinnich]

Just the video I needed - can't wait for the VLAN to 2nd access point episode! I've just set up a two OpenWRT router system because of your fast roaming video.

[@OneMarcFifty]

Many thanks Colin! Perfect timing ;-) I hope that I get this ready until next monday. But it will come _very_ soon.

[@cau8777]

This is the best channel on Openwrt and some more, please continue !

[@OneMarcFifty]

Many thanks for your kind feedback. There will be more to come. I have taken some days off in August and will definitely produce more ;-)

[@Hydrokracker1]

@OneMarcFifty at the 10:39 mark you ticked the bridge interface box, in 22.03 that box no longer appears and we have to manually create a device to configure. What physical devices are you bridging by ticking that box?

[@OneMarcFifty]

Hi Randy - as such you're just creating an empty bridge where you can add devices later. In Versions 21 and later you would create a bridge under devices and then add the devices you want to the bridge.

[@kuzuryu186]

Hi Marc, quick question for you. @10:30 you mention to Bridge Interfaces, but now on latest 22.03 version that isn't there anymore. Do we need to do something different now? The only thing I could see in regards to bridging was to select the device to "Bridge: "br-lan" (lan)" but that seems to do something different...Thank you.

[@OneMarcFifty]

Yes, you can use br-lan or any other bridge that you create under the devices tab. That does the same.

[@andspenrob]

@@OneMarcFifty Thanks for looping back around to this! Is there any benefit to setting up a separate bridge for the guest and iot interfaces, or can they all safely use the same bridge? (i.e. why would you have set up separate ones in earlier versions?)

[@crazylio]

This is such an awsome video! I am just getting started with OpenWRT and LUCI and I have been looking for this kind of video for weeks. Love the level of detail and the screen captures.

[@OneMarcFifty]

Hi Lionel, many thanks - I am glad that you like it !

[@Danacus]

You are doing exactly what I am trying to do. Thank you for the clear explanation!

[@OneMarcFifty]

Awesome- thanks a lot!

[@Christian_Ky]

To be honest, brilliant! It's not only that you explain it simple and brilliant, in addition you really lern!

[@OneMarcFifty]

Hi Christian, many thanks - glad you like it ;-)

[@bradkaral1188]

Darn, your videos are so clear and well-presented.

[@ricardos3756]

This is a great video, and I used it to setup my home network with just a few customizations, but I just tried this again using OpenWRT 22.x and the changes are just too important, especially the missing "Bridge Interfaces" option which also breaks the wireless network setup. Can you please consider updating this video with a 22.x version? Thank you.

[@OneMarcFifty]

It’s true - things have changed a bit. I’ll probably do some follow up as soon as the remaining dependencies to iptables will have been removed

[@TheKan3nas]

@@OneMarcFifty Please confirm can we overcome this by using a specified bridge e.g. br-lan? or I am missing something

[@ictstelucjam3604]

Thanks so much for all those great video Marc.. It's really helping me to go everyday a step further on my home network. It takes time, but I will get there...

[@OneMarcFifty]

Awesome, many thanks for your feedback!

[@tolisl5013]

Hi Marc. I would like to see another video in this series and I believe it is a must. Setup of IGMP snooping and mDNS so devices and services can be discovered across the network. This would provide a seamless experience for the users.

[@OneMarcFifty]

Hi, definitely. mdns and IGMP are on my list - but unfortunately not at the very top ;-( The use case would be airprint / airplay etc.

[@tolisl5013]

@@OneMarcFifty also this would be beneficial when using smart home apps like home-assistant, where devices discovery is very convenient

[@henning7801]

Another great video. I've been reading documentation for days to find out what and how I have to configure a OpenWrt router. Just like Franceso Pocci, I find the OpenWrt documentary very confusing. Only when you understand how it works can you understand it :( And like Colin Nicholson, I'm excited about the expansion to include VLANs. You have a talent for explaining complicated things simply. Great. And that with the proverbial "German thoroughness" Last night I managed to flash my Archer C7 on OpenWrt. Had the latest TP-Link firmware and unfortunately only worked with TFTP. It took me a long time to find out that media sensing was the problem to get TFTP to work. :( I'm going to do the configuration right now. I will try myself to get VLAN working too... Many greetings from Braunschweig to Berlin

[@OneMarcFifty]

Many thanks for your kind feedback!

[@henning7801]

@@OneMarcFifty Got VLAN's for IOT / Guest work on my Archer C7 :) LAN Ports and Wireless works as expected. Thanks to your video "Building a managed switch with OpenWrt on old Wifi Router" Next step is to add an additional dump AP with VLAN support, fast roaming, ...

[@henning7801]

I would like to see another episode on the topic. Extended firewall configuration according to the blacklist principle when using VLANs. E.g. allow HTTP / HTTPS from LAN / Guest zones, but stop sending SMB packets over the WAN interface.

[@VadimRotaru]

Marc, great video, convinced me to move to OpenWRT with all my thought to restrict the local devices I have as much as possible. One question though - why not restricting IoT devices to access my router? I'm not an expert, but doesn't those smart plugs represent a trojan horse for someone who knows what to do with them once they can ssh to my router? What if we "reject their input" and create the same rules as for Guest Network with DHCP rule only?

[@OneMarcFifty]

Hi Vadim, valid approach. There is no 100% Security ;-) If someone takes over your router then you might have a whole bunch of other problems as well ;-)

[@atravels1055]

Hi - I'd like to add a comment that took me hours of frustration. The 'interface' names need to be created in lowercase - otherwise there will be no IP assigned even if it's setup properly. I didn't try all capital - but a mix of lower/upper case resulted in a connection to the guest network, but no internet/obtained IP. One thing I can't get working, is connecting over wifi to the "IOT" wifi network. Was that not the intention based on these instructions? Basically, I wanted a separate "guest" network for IOT devices that can't see my LAN. I can connect to the "GUEST" network fine, but not the "IOT" one.

[@robyp]

Thanks for the explanation, it was very clear. I have been fooled by that double "forward" setting! If I can ask, what hardware did you use to install OpenWRT on?

[@OneMarcFifty]

Yeah, that one is hard to explain because the terms are so similar. Honestly I can’t remember which hardware I used for the video - one of Archer C7, D-Link dir2660 or potentially a VM.

[@catsupchutney]

I am *completely* in agreement with you about the need to block IOT devices from phoning home.

[@OneMarcFifty]

Many thanks for the feedback ;-)

[@Eurobunker]

@10:30 what does the enabling "Bridge interfaces" here actually do? How did it help in the "next episode" and what would have happened if we didn't enable it? BTW: GREAT OpenWRT explanation. Firewall Zones on OpenWRT is a hard topic for me, but now I more or less get it.

[@OneMarcFifty]

Mainly "enabling bridge" in OpenWrt 19 links the interface to a bridge rather than one single interface. The advantage is that you can add multiple devices (Ethernet, VLANs, Wireless) to one single interface rather than have one single interface. Things have changed in OpenWrt 21 as well w/r to the separation of "interface" and "device"

[@katywu1]

Marc - great content really enjoyed it. Just one observation in relation to the OpenWrt firewall gui screen and your comments around 6:30. Earlier in the video you explained nicely about the different tables and chains involved but your comment about ignoring the forward chain setting on the right hand side of the screen threw me at first. You are basically saying ignore it (in fact I could just set the forward action to reject) as it has no effect at all as you should actually control forwarding through the edit menu function and by how you configure the two drop down menus at the bottom of the screen i.e. "allow forward to destination zones" and "allow forward from source zones". Just thought I would check my understanding is correct? thanks again

[@OneMarcFifty]

Hi - many thanks for asking ! I had to look it up before I made the video ;-) the third setting on the right is actually forwarding WITHIN the zone, i.e. if you had multiple networks inside the LAN zone and would want to allow or deny forwarding between them. So it's INSIDE one given zone. The setting that we change in the vieo is the forwarding BETWEEN zones, i.e. from one zone to another ;-) Great question - many thanks for your feedback !!!!

[@gasparem16]

Definetly one of the best videos on OpenWrt Firewall settings. Thanks a lot! brillant.

[@OneMarcFifty]

Thank you very much !

[@oKP77o]

Just to double check two things at 5:32 when you say that the output is set by default so the router may access all other zones, can you think of a scenario where you wouldn't wat that to happen? Also at 5:40 you mention that everything is kept its in own zone, do you mean that everything its kept in its own network within the zone that the forward policy is applied to? Want to make sure my understanding is correct, thanks again for the wonderful vids!

[@Ilshatms]

Hi Mark! In openwrt version 22.0.3, when creating a network interface, you need to select a device. Apparently for the guest and IOT you need to create a new device?

[@OneMarcFifty]

Either you create a device for each VLAN (eth0.44 or the like), add it to a new bridge or you can use Distributed Switch architecture DSA. There is a video about VLANs on version 21 on my channel page

[@cattivello]

Hi, you are a great trainer. Your explanations are clear and calm. I do have a problem.. I followed your steps but I run into some issues: 1) any cable I plug in the router LAN ports seem to be routed to guest lan. 2) also the normal wifi is routed to Guest lan. I checked and rechecked your video and I dont seem to do anything different. I use Luci 21.02. Do you think that has different settings? I must say that the GUI is just a bit different an so some of the options. Any chance you can review this tutorial with the latest Luci? or give me some suggestions? Thank you

[@karpwgalarecie2406]

That's true there is new framework called DSA instead swconfig from video. it's quite embarrassing for newcomers like me too.

[@OneMarcFifty]

Hi, first off - many thanks for your feed-back! Actually yes, things have changed in OpenWrt 21 and more importantly with Linux Kerne 5 and the way VLANs are handled - the new DSA architecture is customized on the interface itself, there is no "switch" menu item any more. I'l see if I can update the series.

[@OneMarcFifty]

Ah - saw your reply - yes correct - DSA requires configuration on the interface itself. I'll take a note of this and update as soon as I can.

[@rlajos]

Thank you for the great content! I would like to know a bit more, how do you configure the provider's router LAN output and the first OpenWRT WAN input area? Do you allow the provider's router to make the NAT? Or will it be done also in the OperWRT?

[@OneMarcFifty]

In my case, I just set the WAN interface of OpenWrt to DHCP, i.e. I let the ISP do NAT. From a performance standpoint not the best solution but the easiest to implement as from the ISP router's standpoint it looks like there is just one client.

[@MrBrownpotato]

That was excellent - thank you for demystifying openwrt firewall settings

[@OneMarcFifty]

Thank you very much!

[@tonybell1597]

After many hours of struggling with OpenWRT in the past months, finally came back to it and re-watched your series on OpenWRT, I think I have a handle on it now (which probably means I don't understand it 🙂 ), and now have Guest Access points and its all working well..... its a steep learning curve with Openwrt, didn't get the fundamental building blocks of "interfaces" and how they relate to the router, to physicall ports and other network dark arts, but its now making much more sense. Many thanks Marc....

[@OneMarcFifty]

Hi Tony, glad to hear that the videos helped bringing pieces together. It's true that every software has their own look and feel and also - I'd say "philosophy" of looking at things. the main thing I personally struggle with products that are new to me seems to be exactly what you describe - getting my head around the "way of thinking" - or building blocks like you called it. Don't give up ;-)

[@dogcatmause]

if I set up the IOT as described here, my IOT devices become useless as far as I understand. If I use Home Assistant or any other IOT server located in the home network, according to my understanding, the devices are now isolated in such a way that they cannot transmit information to the HA. How do you solve this problem?

[@OneMarcFifty]

Hi, it depends on what you want to achieve. If you want your devices to be discoverable by HA then HA needs to have a leg in that network segment. You could therefore assign an additional network interface to the HA Server and modify routes/forwarding etc. or you could define routes on the router allowing HA access into that segment. Alternatively (this is my use case with FHEM, but would work with any Home Automation that supports MQTT) - install Mosquitto on the router and have the IOT devices communicate with HA over MQTT. Mosquitto would listen and broadcast in all segments and hence be an application gateway or middleware for all home automation over all network segments without exposing devices or http interfaces and the like.

[@blanked_out_chin]

Marc, do I need to add a new interface for each Vlan ID I want my router to recognize or is adding it on the "Switch" page enough? And also do i add firewall zone settings for each? I may be thinking too complicated for this and it's much simpler than I thought

[@OneMarcFifty]

It depends on the OpenWrt version. I briefly touch on this in the "VLANs in OpenWrt 21" video.

[@_k5271]

Super knackig erklärt. Vielen Dank. Genau danach habe ich gesucht. Sehr guter Content.

[@IndiaRan]

Well explained and sumarized the firewall concept of openwrt, not available in utube though it is in openwrt forum scattered in bits and pieces. Looking for videos on : 1. parent contro traffic rules, esp this pandemic season it all the more imperative. Kids are smart with their whack a mole device outwits the tagged IP or MAC in traffic rules. 2. Access openwrt router from internet (we have one of the wifi tagged to OpenVPN). No videos on this in you tube. Hope there would be enough requests for these and would be helpful to mmany openwrt users. Thanks in advance.

[@OneMarcFifty]

Many thanks for your feedback @Ranish and thank you for the suggestions - port forwarding is on my list but parental control was not - I‘ll have a look into options (hint: give your kids a separate Wifi in a separate FW zone, this is resistant against ip/mac changes)

[@cheapthrills280]

Thank you for this tutorial good Sir! This is verify helpful to me. Just want to add 1 question Sir. Is there a way to separate browsing (wanA) and gaming (wanB) on different wan interfaces with a failover option?

[@OneMarcFifty]

Yes you can do that. Just define two lan interfaces, attach a wifi to each one and define the same or different firewall rules for each (basically allow forward to wan)

[@AntonPopov_]

Thank you for that great explanation of firewall rules! I really needed this. Great work!

[@OneMarcFifty]

You're very welcome! Glad you liked it !

[@joefrank133]

Really well organized and informative! Thanks so much! Just wanted to clarify around the 8:52 mark: If I want to separate these rules, wouldn’t DNS be using UDP and DHCP using TCP? I think you might have flipped them.

[@OneMarcFifty]

I am actually simplifying the rule in order to just use one. I open both protocols tcp and udp on both ports. But because there is nothing else on the opposite protocol there should be no risk to that.

[@chenkarenina4299]

@@OneMarcFifty According Wikipedia, looks only need open port 67 for DHCP cause port 68 only use to reply to client, so it not necessary. zh.wikipedia.org/wiki/%E5%8A%A8%E6%80%81%E4%B8%BB%E6%9C%BA%E8%AE%BE%E7%BD%AE%E5%8D%8F%E8%AE%AE

[@MrEqtube]

@@OneMarcFifty You said that DNS uses only TCP. False! DNS uses UDP unless answer is too big to be delivered over UDP, in which case server tells client to connect again using TCP.

[@thelightings]

The best video for openwrt. Thanks you so so much for this.

[@OneMarcFifty]

Many thanks for your kind feedback ;-) kzbin.info/door/G5Ph9Mm6UEQLJJ-kGIC2AQ

[@philtype-r810]

Thank you very much for your videos, they were really helpful for setting up OpenWRT :) Quick question: How can we isolate devices from each other in the guest network? I have created a bridge device br-guest bridging br-lan.3 and bat0.3 (I use batman-adv) and added it to the guest network. Communication between lan and guest is blocked, however the devices in guest can see and access each other. Checking AP isolation on the radios and bat0 seems to change nothing. On DD-WRT i had to manually setup ebtables. Is there any way to set this up with luci? Thanks a lot!

[@OneMarcFifty]

I have not yet found a good way to do this. If you set up Wi-fi isolation, it will work on one AP but not over many APs. Firewall-wise you can't really define such a rule in LuCI. You would need to come up with some rule based on the MAC addresses (deny all traffic from GUEST except to the router itself).

[@philtype-r810]

@@OneMarcFifty Thanks for your response! I have researched a bit and found some ways to achieve this. One easy and efficient way would be to enable VLAN filtering in the br-guest settings and simply setting 1 PVID Egress untagged on each Port there. This would effectively deny all local communication on that bridge. However there are two problems: Using batman-adv on nodes, this would also deny communication to the gateway router via bat0.3. Also, there is currently a problem with the bcm4366 driver (?), where wifi does not work on bridges with VLAN filtering enabled. I did the following to achieve this goal: - Enable AP isolation on guest Wifis on each node - Install ebtables-nft and add the following to the startup of the gateway router: ebtables -A FORWARD -logical-in br-guest -logical-out br-guest -j DROP - Add this to the startup of all other nodes that are connected via batman-adv: ebtables -A FORWARD -logical-in br-guest -logical-out br-guest -in-if ! bat0.3 -out-if ! bat0.3 -j DROP I read a lot online that ebtables is quite inefficient, however this is the only way that worked for me. I didn’t notice any performance degradation doing this.

[@OneMarcFifty]

Great one! I’ll add that to my router for testing as soon as I can - thanks for sharing!

[@lamb237]

Great video, i'm often refering to it whenever my memory fail me :) I do have a question: On my iot zone, how would you enable smtp only to go through wan so my wireless cameras can send me emails on events. Your instructions on iot zone restrict access globally under zone forwarding proving no wan access. Would you go the by the trafics rules instead to permit only smtp protocol. Thank again for your great tutorial.

[@TimoteoTomas]

Very enlightening! What if i have an NVR and connected it the IOT wifi, will it be able to notify me incase I turned on the Detect Motion and Notify me. Thanks and More Power!

[@OneMarcFifty]

Hi, thanks for your comment - I personally like to do notifications over network boundaries with MQTT - for this I have Mosquitto running on my router which is accessible from all network segments

[@patrick1020000]

Hey Mac, question you might be able to answer - I have my access point set to AC mode on 5Ghz, but my devices don't seem to connect on that mode. I have one device with an AX WiFi chip which connects via 802.11a band and a device with an AC WiFi chip which connects on 802.11n. How can I make them connect on AC, and how can I confirm my access point is correctly broadcasting AC?

[@OneMarcFifty]

Hi - in order to check what the access points are broadcasting I suggest running "iw scan" on a Linux workstation with Wifi hardware. That will show you everything.

[@WillClarke91]

Hi, great videos. One question though, why does your IoT network have access to the router interface/login page? I had a rogue IoT device previously attempting user/Pw combinations, I really want to avoid this. How would I block them from seeing my router? You also said you don't want devices on your IoT network to phone home. How would they continue to work if blocked from WAN? E.g blink cameras, nest doorbells etc as they need Internet?

[@OneMarcFifty]

Hi Will, mainly this was just for the sake of simplification. You could as well set the default Input to "drop" and then enable only needed services (such as DNS, DHCP, maybe NTP). W/r to internet access - the IOT devices that I use are no cloud devices. They are mainly DIY devices built with ESP8266 or ESP32 micro controllers and don't need internet access. My vacuum cleaner is an exception. It does need internet access and is in a separate DMZ.

[@AkshayCS1]

Thank you so much for this wonderful video! At 10:25, I'm not seeing a "Bridge Interfaces" option in the current version of Luci. Proceeding to create an interface without that option shows "Device: Not Present" under status. Any idea what could be wrong?

[@sidbyron210]

I have the same problem. Did you resolved?

[@OneMarcFifty]

Things have changed in OpenWrt 21 - video is in the making and will come out in December !

[@AkshayCS1]

@@sidbyron210 Yes, I managed to resolve it. I created separate VLANs and used them.

[@avsomeren]

@@OneMarcFifty Am I correct that I can just create a custom device named br-GUEST and br-IOT?

[@dronerequest]

@@OneMarcFifty Hello, did you ever make this video? I am stuck at this part. Thank you!

[@ghkpr]

This channel is a treasure! Thanks you!

[@torstenwohemer6543]

Hey Marc, first of all thanks for this very good tutorial, which helped me very much! Also I got a question: I would like to specify a firewall zone for a specific port on my router. Is that possible? How? Thanks a lot in advance!

[@OneMarcFifty]

Yes that’s possible. You would just have to assign a port untagged to a VLAN and then define an interface that is using the specific VLAN. With DSA on version 21 you could also just define an interface that has the port device (e.g. lan2) as the physical device and assign it to the desired zone. Just make sure the port is not on any other bridge or the like.

[@ColdScarecrow]

Thank you for this superb video. I finally could understand the firewall in OpenWRT easily!. Subscribed and waiting for more OpenWRT master classes 😉

[@OneMarcFifty]

Awesome, thank you!

[@Smitch1971]

Great video again Marc :-) I have a question, is it possible to put one or more of the ethernet ports in a zone that way putting it on a seperate real network like you did with the firewall zones as opposed to a vlan?

[@OneMarcFifty]

Thanks mate! What you are looking for _is_ effectively VLAN, you can‘t assign a switch port to a firewall zone without eth.x interface.

[@Neo198431]

Great video helped out a lot as openwrt does things differently than other custom firmwares. One thing though my tv won’t connect to the IOT wifi I created is it due to way the forwarding because the tv needs an wan connection? Or am I understanding this wrong.

[@OneMarcFifty]

It might need a default gateway- or maybe it’s checking internet access? Dificult to say from a distance

[@JAAPOP8]

Hey, Marc! isn't it time to redo this episode with the latest OpenWRT version? Consider this a humble request...

[@JAAPOP8]

Maybe just a quicky...

[@OneMarcFifty]

Hi, many thanks for the suggestion - following your comment I have re-watched the video - it's true that some things have changed in OpenWrt 21 - especially with bridging and how we assign the Wi-fi etc.... Need to think this over ;-)

[@JAAPOP8]

@@OneMarcFifty I'll become a patreon if you do...

[@skynetdyson3970]

Great openwrt videos,same case in my home,i want to trunk two openwrt routers with diferent vlans,thanks!!

[@OneMarcFifty]

Many thanks for your feedback!

[@k0nstant1n0s]

Thank you so much for the effort you put to create this video.

[@OneMarcFifty]

Many thanks ;-)

[@adityajoshi321]

Nice explanation. I just flashed openwrt to my router. I have a raspberry Pi running multiple applications on docker connected via ethernet. They all have unique IP's on my LAN ( by creating a macvlan network). Is it possible to isolate one application (using one unique lan ip) so that it cannot access other LAN devices?

[@OneMarcFifty]

Hi Aditya, that scenario would require the implementation of VLANs on the host and then binding the docker containers to the separate VLANs (e.g. eth0.3 / eth0.4)

[@Andrew-by5yo]

Would you mind sharing what router models you use/suggest for the Router/Firewall and Access Point Devices? Thanks for these videos, I've been struggling in vain to do a similar setup using dd-wrt.

[@OneMarcFifty]

Hi Andrew, in the video I had been using Archer C7's but I have replaced them with D-Link DIR-2660's these days. You might want to check my video on Router models here: kzbin.info/www/bejne/rYGUi5aHd7F_Z80

[@ShadowingforEnglish]

Thanks for the great content. I followed the procedure and put iot devices as well as my printer into a different subnet. Now my computer can't find the printer. Could you please tell me how to make my printer accessible by my computer and mobile phones?

[@OneMarcFifty]

You'd need an mdns repeater/IGMP proxy style of software in order to use Airprint and the like so that your phone sees the printer. Omcproxy might do the trick or else mdns-repeater in a linux container or Avahi with echo function. Plus you need to allow ports 9100, 631, 443 TCP and 5353 UDP to the printer

[@CEPTha_78BANG]

Thanks so much for being so clarified, Mr.!☺

[@Bobhavlin]

Thanks for the videos! I am trying to follow you to achieve the dumb AP vlan over one cable, but when I try to create the new interface I do not see the "Bridge Interfaces" checkbox (video @ 10:44) and then when adding Interface my status shows "Device: Not Present" while you show "br-GUEST" (video @ 10:54). I am on the Belkin RT3200 snapshot r21517-d7876daf65. Anyhow, it seems maybe I missed where the device br-GUEST was created. Any ideas?

[@OneMarcFifty]

This has changed in OpenWrt 21. You now create a bridge device under Network-Interfaces-devices tab, add the Ethernet ports to it. Define an interface and attach it to the bridge. When you create a Wifi you can then attach it to the network.

[@miguelangelpatlan294]

Hi, thank you for sharing this info, question, is there a way for Block access using MAC Filtering , I just want to allow wireless connection for those devices with MAC address in my list. Regards !

[@OneMarcFifty]

Hi, you can do that on the "Security"tab of the Wireless. Another possibility would be to just not give them IP addresses over DHCP.

[@lcbdias]

Will my IOT devices continue to be able to perform firmware updates even without internet access? Also, after starting the Guest and IOT interfaces my AdGuard Home is no longer being used as main custom DNS Server by the LAN interface... I dont get it, i didnt change any setting on the LAN interface. On the Guest interface i manually set some custom DNS Servers of my preference, on Guest network i want to bypass the AdGuard Home

[@dalew7491]

I setup your configuration on a WRT610N running OpenWRT 19.07.7. Each of the 3 Wifi work perfectly as standalone but when I try to start all 3 together Radio0 fails on restart. Radio0 is 2.4 GHz. 5 GHz is not recognized by OpenWRT. Any suggestion as to what might be causing this problem would be appreciated. I suspect the router hardware cannot support this configuration.

[@OneMarcFifty]

It ooks like there is a hardware revision that has issues with 5 GHz - if your HW Revision is V1.0 (Serial number CTG01...) then it might not be possible as of now - please see openwrt.org/toh/linksys/wrt610n_v1

[@LeonidMutti]

First of all, I would like to thank you. And I would like to ad just one small thing. I forgot the rule for the IOT-DHCP part in the firewall configuration section. Without it the IOT devices will never get the IP addresses 😀

[@Andrew-by5yo]

Marc, I have a use case where a guest on the Guest lan needs access to a printer on the LAN lan. I've tried adding a firewall traffic rule to allow access to the printer ip address from the Guest lan. This doesn't work as it appears the general lan to guestZone forwarding rule is executed first and blocks all traffic from the Guest lan to the LAN lan. How do you handle forwarding exceptions to the general zone forwarding rules?

[@OneMarcFifty]

The general setting should not be evaluated before a traffic rule. However, if there is a traffic rule above then this goes first

[@Andrew-by5yo]

@@OneMarcFifty You were spot on, there was another conflicting traffic rule.

[@brianpayne5773]

This is am outstanding video. I hope your channel is successful. You deserve it. I am subscribing.

[@OneMarcFifty]

Hey Brian, many thanks for your kind feedback and for subscribing!

[@АлександрКабанец-х8з]

Hi! Actions ACCEPT, REJECT ... etc. are used when we talk about rules in the chain (with appropriate criteria for a packet in these rules) but not to the chain itself. How it can be understood? Does it mean that chosen action is applied for all rules in the chain? Thank you!

[@OneMarcFifty]

Hi Aleksandr, those rules are default settings, i.e. they apply for everything. If you want then you can have exceptions in the traffic rules and be more specific on Source IP, Destination IP and many more.

[@donpetties1817]

Is there to still block devices on the iot firewall from the internet, but also certain ones. For example a smart TV, Google home, or HA server

[@OneMarcFifty]

You could add another zone and call it "Multimedia" or the like

[@mandozuken]

Sorry for bothering you. I am new to openWRT and I followed your video, but for a more simple setup. I have two 2.4 lan’s and the issue I have is when I finished in the IoT network the devices did not connect within each other. My cameras need to record the videos to a Sync device. I did not checked the isolation option. I will really appreciate if you can point me on the right direction. Thank you

[@michaelb.7610]

i want to open the iot network for mqtt at port 1883 for the lan network, so that my iot devices can send packages to a mqtt broker which is in lan. I dont know how to handle it.

[@archibored2533]

Hey there. I know that this video is 3 years old. But I'm trying to add another IOT zone for things like smart tv that still needs to connect to internet. From my understanding from your video, I needed to create an IOT zone but with almost the same settings with guest. The problem I am having is I cannot cast from my main SSID to the SSID of the IOT with the internet.

[@ThePunkyDrewster]

Hi Marc. First of all your videos are very helpful and I'm great full for you putting in the time in teaching. However, I'm having an issue that didn't work on my end (7:08 mark). I followed everything on the guest zone, then I tried on that zone with my laptop to see if it works but, it let me ssh. I must've missed a step. I watched the video over a bunch of times. And I can't seem to get out of this loop.

[@OneMarcFifty]

Hi Drew, are you saying that you _can_ ssh into the router's guest IP even though your expectation is that you can't ? Presumably then you are connecting to the router over the LAN and not the GUEST network ? Even connecting to another IP _on_ the router would NOT go through the forward chain but through the INPUT chain of the network that you are connecting from. So if you connect from LAN, then yes - you can ssh to the guest's IP address. ut you can't do that if you come FROM guest.

[@blanked_out_chin]

Yes, as Marc has said, simply put: your laptop needs to be connected ONLY on your Guest Network for this to work (well, not work for the SSH part heh) if you're plugged in with ethernet, you need to make sure that port is a Guest only port and not a LAN port (via Switch>VLAN ID).

[@anatolistrechen6619]

So good. Thank you for clear explanation!

[@OneMarcFifty]

Many thanks Anatoli.

[@johanna-bapt.martaasaeda9499]

Hello ! I have a question again: I left MAC address the same for all the interfaces, like you did in this video. And I think it's been fine in terms of internet usage. Now, I am using OpenNDS captive portal, and it's hooked on just one interface. But it also reads the devices on other interfaces, and I suspect that it might be because the MAC address is the same. Could that happen? Do you change MAC address for new interfaces when you create them for yourself ? (i.e. not to make a teaching video) I would appreciate your hints !

[@OneMarcFifty]

Generally speaking I change MAC addresses of interfaces if there is DHCP involved, i.e. if I want an interface to get a specific IP address. It won't do harm if your interfaces support promiscuous mode which should be the case on most routers.

[@johanna-bapt.martaasaeda9499]

@@OneMarcFifty Thank you for your reply ! I think my interfaces do support promiscuous mode. Is it safe to change Mac addresses of interfaces on production system on the fly ? Would it cause any disruption of internet connection? (like, having to restart the router?)

[@elpeperumanof236]

I think I should follow all the instructions in the video, even liking and subscribing hahaha

[@tolisl5013]

Thank you very much 😊 Great explanation

[@OneMarcFifty]

Thank you

[@iamrage4753]

question, would you class android streaming boxes and Chromecast googletv as IOTZone worthy and what about making casting work in this type of configuration?

[@OneMarcFifty]

Hi, I have added my Multimedia devices (Kodi, bluray player, TV Sets and the like) into a separate Multimedia Zone. Getting mDNS and broadcasts to work requires a lot of fine tuning and configuration... not easy ;-(

[@iamrage4753]

Can you possibly cover how to set that up please?

[@samstringo4724]

Thank you for the video! I have set up a guest wifi on my Openwrt 19.07 router. Everything works as it should, and the guest clients connected to the guest SSID cannot ping LuCi or any other IPs in the LAN zone. BUT I want the guests to be able to communicate with one IP in the LAN zone, a brother network printer. I checked what common ports are used for network printers and I have set up a traffic rule allowing use use of those ports only to the IP of the printer in the LAN zone. But I cannot access it from the guest clients. Only if I allow "Forward to destination zone LAN" in the firewall zone settings in the guest zone, the devices in the guest zone is allowed to reach the printer, but then they can access the rest of the IPs in the LAN zone as well. How can I make the traffic rule somehow override the Firewall zone settings?

[@OneMarcFifty]

Create a traffic rule (Network - Firewall - Traffic rules). Set the protocol to TCP. Source Zone to GUEST, do NOT add a source IP. Set the destination Zone to LAN, specify the IP of your printer in the "Destination address" drop down. Specify the destination ports (e.g. "9100 631 515 443") and set the Action to "accept". Make sure that the rule is ABOVE any other deny rule (i.e. move it to the top of the list).

[@joshenders]

This is so good. Thank you very much for sharing.

[@OneMarcFifty]

Hi Josh, thank you very much !

[@joshenders]

@@OneMarcFifty it’s silly but after a 15 year career at big tech companies in Silicon Valley, this is the video which made iptables finally click in my head! Would love to see a deeper dive, I feel like you have a lot to share.

[@GLHerzberg]

Great channel, Great instruction too but for the life of me just could not get this tutorial to work on a Linksys EA3500 running OpenWRT 21.02.3. That said, OpenWRT's Guest WiFi Basics CLI command list also would not work which may mean the issue is with the router (or the seat to kybd interface).

[@OneMarcFifty]

Hi Greg, some things have changed in OpenWrt 21 (what you have) as opposed to 19 (the video). Mainly bridging is done on the device tab under network-interfaces and you would then select the bridge as a device under your interface. Your Wi-fi is then added to that network.

[@Raukze]

Hi Marc, thanks for the video, it really helped me a lot! I have one question about my specific setup. I have one device which needs to be able to talk to all iot devices, the iot devices need to be able to talk to that one device and this but only this one device needs to be able to access the wan zone. Right now I located that one device in the iot zone but don't know how to setup a rule so that this one device can access the wan. Can you help me with this one? Thank you!

[@OneMarcFifty]

Go to Network-Firewall-Traffic rules, add a new rule. Name "IOT exception", protocol : TCP/UDP or whatever you need, Source Zone: IOT, Source Address: Select the device that should be able to talk to the internet. Destination Zone: WAN, Action: accept. Mae sure that rule is at the top of the list or at least before any deny rule, save and apply ;-)

[@Raukze]

@@OneMarcFifty Thanks for the quick reply. What I was missing was that I just allowed TCP/UDP and I was testing my connection via a ping 🤦‍♂️

[@francocastilloAR]

@@Raukze Perhaps you had to indicate the protocol as "Any".

[@sidney2170]

What happens of I set output of GuestZone to reject? Does the lan also lose DNS etc? OpenWrt can connect or not to wan and is not aware who is asking at application level anything. Right?

[@dasgoll]

Any recommendations for a WiFi card that will work with openWRT? What kind of cards do you have?

[@OneMarcFifty]

The Qualcomm Atheros QCA9880 work quite well. The Mediatek seem to be good as well.

[@evadtgov9845]

I only have 2 radios, so I created my primary and Guest network as described in the video. I'd like an IOT network, so how can I create a second network on one of the radios?

[@OneMarcFifty]

You can create multiple networks on one radio just by clicking on "Add" next to the radio under Network-Wireless. I have 6 SSIDs running here per radio.

[@tonebaxter]

Awesome content! Thank you… I see many new projects in my future. New sub!!! 👍🏾❤️

[@OneMarcFifty]

Awesome - many thanks for watching and subscribing !

[@jbgrenouille2527]

Hello, excellent your lessons! :) any lesson to configure "Nat 1:1 in openwrt " or netmap - Dnetmap "??

[@OneMarcFifty]

Hi JB, many thanks ;-) I'll need to have a look at NAT networks and possible videos on that - comes up quite often. But none for the time being I'm afraid ;-( kzbin.info/door/G5Ph9Mm6UEQLJJ-kGIC2AQ

[@cattivello]

Hi thanks for the tutorial. Very well done. I have a question: since I follow the tutoria and created the 2interfaces for IOT and guest, all my physical ports seems to fall under the IOT DHCP server. What am I doing wrong?

[@OneMarcFifty]

Hi Cattivello, difficult to say from a distance - are you using OpenWrt 19 or 21 ? in 21, the configuration of the VLANs is different.

[@cattivello]

@@OneMarcFifty 21 (yes, i noticed some differences) for the rest it all works. But at the moment i have to create static leases to make sure my devices stay in the correct subnet

[@francocastilloAR]

@@cattivello You may be allowed to forward between firewall zones.

[@qrisjin]

If you isolate devices on IOT network from the internet, how do you control them from an app on your mobile device? Case in point: I have IP cams I would like to 1) isolate from my LAN 2) stop from "phoning home" and 3) still control/receive notifications from when at and away from home LAN

[@OneMarcFifty]

Hi - the main reason for me isolating my IOT devices is that I didn't have any cloud based IOT devices at the time of making the video (All my IOT devices where more or less DIY solutions based on ESP8266 / ESP32 at the time). I do in the meantime have some cloud devices, but I moved them again to a separate VLAN - All you'd have to do in order to adapt is add internet access to the IOT zone really.

[@qrisjin]

@@OneMarcFiftyOk makes sense. Well done on all the OpenWrt videos. Very thorough and explained succinctly.

[@zeal514]

Running 22.03, and setting up a zone to reject input, let's say from a guest network, is yielding all devices on the interface, in that zone, with the inability to get a IP from the DHCP server. In order for the devices to connect to the internet, they need to be configured on the device end to have a static IP within the range... I think openWRT in a update changed the way these firewall zone rules work?

[@deNuNietNooitNiet]

This video only made me realize I do not have the basic skills. This is gonna take a while. But hey, that's the fun of it!

[@OneMarcFifty]

Hi, many thanks for your comment! Oh yes - I know the feeling ;-) You know, many of my videos are born out of ideas where I had absolutely no clue before I started producing the video! I take a lot of inspiration from the discussions on Discord - basically I am only sharing my learnings ;-) If you do however have an idea on how to support with a video on basics or the like then please let me know!

[@tommasoanastasio7775]

Hey man, big big work...This is not a video. This is the bible 🙂 I have, if possible, a question. I have successfully implemented three vlans. One "Lan", one "Guest" and one for IOT devices. I have extended the implementation to WIFI as well. The Lan reaches the Internet and the other two zones, the Guest only reaches the Internet and the IOT does not reach any area including the web. Everything seems to work and the results of the various pings are consistent with the infrastructure. The problem is with IOT devices. I have a single smart plug correctly connected to the IOT (it receives the IP from the interface's DHCP server). I connect my mobile phone to the IOT network and the application, specifically SmartLife, sees the device and manages to interact with it. If I connect to the LAN the device goes offline but I can still ping it...I'm going crazy! Thank you so much for any advice.

[@OneMarcFifty]

You would need to figure out what ports and protocols the app is using to communicate with the devices and then open those for communication really ;-(

[@tommasoanastasio7775]

@@OneMarcFifty Many thanks for the reply. I am currently experimenting with the mDNS protocol implemented by the avahi package. But the results are disappointing ... I will try to understand, through tshark, what happens on the net :)

[@carelverwey9958]

With regards to a guest network, how do you prevent non-guests clients that are in range to abuse your wifi? e.g. a neighbour permanently connecting and taking up valuable bandwith. Is there a way to mitigate this risk?

[@OneMarcFifty]

Put a password on the guest wifi ;-)

[@bifkinuk]

I have followed this guide to the letter multiple times (factory resetting and applying latest firmware) but can't seem to get the internet to work on the Guest wifi, even after entering 8.8.8.8 DNS server and using 255.255.255.0 netmask. Internet only works on the main wifi. Any ideas?

[@OneMarcFifty]

Hi, difficult to say from a distance without logs etc. Maybe hop on the discord server and ask there

[@bifkinuk]

@@OneMarcFiftythanks for your response I figured it out eventually was because I needed to set the access point IP on the same subnet as the router