Flying Without Elytra

In this episode we start by exploring the basic AFK fishing farm. While building a potato farm we learn about the scientific method and how we can apply it to Minecraft to find a new fishing farm design for 1.19. Unfortunately we are still on 1.18.2, so we have to develop our own autofish mod. From the newly found programming experience we then are able to develop our own fly hack and bypass the server flying detection!
Simple AFK Treasure Fish Farm Concept for 1.19 Sculk Sensor:
• Simple AFK Treasure Fi...
Easy Carrot & Potato Crop Farm Tutorial | Simply Minecraft (Java Edition 1.17/1.18)
• Easy Carrot & Potato C...
MrTroot/autofish github.com/MrTroot/autofish
Trolling 2b2t Players with a "Magic Carpet" • Trolling 2b2t Players ...
Episode 04:
00:00 - Intro
01:23 - AFK Fishing Farm Explained
05:30 - Let's Play: Villager Breeder & Potato Farm
07:00 - The Scientific Method
10:27 - Inventing a 1.19 AFK Fish Farm
12:25 - Developing AutoFish Mod
18:14 - Bypassing Server Flying Detection
23:32 - Flying without Elytra!
24:52 - Outro
Music:
C418 - Minecraft Soundtrack
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[@marchembernnadlor4460]

This is actually a good way to learn cyber security many people wouldnt understand the moment they step in since its very confusing at the start. If you start it off via a game that a lot of people play it tends to be easier

[@wlockuz4467]

Exactly my thoughts!

[@v380riMz]

It’s a good way to start for fun yes, but you’re not going to learn AD exploitation from this lol

[@huhulili9021]

@@v380riMz why bother with AD exploits when you can do RCE?

[@v380riMz]

@@huhulili9021 I was giving an example. AD exploitation is something comparable to real life (i.e. taking over the whole network with domain admin access). RCE depends on the context of what youre trying to achieve

[@kaljinx]

@@v380riMz Hey, I was wondering how should I as a beginner get into all of this. I have programming experience, but nothing low level.

[@leonader9465]

I love how this video starts like a normal Minecraft tutorial and then suddenly turns into a Minecraft hacking tutorial halfway through. Excellent video. Thanks for sharing.

[@Liz4rdMan]

This is the perfect combination of what interests me. Gaming + Hacking + detailed explanations + Easter eggs (herobrine)

[@le9038]

wait. herobrian?

[@Liz4rdMan]

@@le9038 Yes. 12:36 is one of the times. Check the comment section for more time stamps.

[@AnalyticalReckoner]

Just wait until you are old enough to get into boys.

[@epicm999]

@@Liz4rdMan Virgin Herobrine vs Chad LiveOverflow

[@willtn]

@@AnalyticalReckoner very unfortunate typo, u meant "bots" right?

[@cauhxmilloy7670]

4:22 "When we understand it, we can also change stuff." This is really the heart of engineering. The best way to make better stuff is by understanding the underlying mechanisms at play. This series has been fun this far. Speaking as both a low level programmer, and someone who has spent a lot of time making custom redstone circuits, I really enjoy watching and I really hope that this series reaches a lot of people to get them interested in engineering.

[@lisam5802]

Redstone's systems are very helpful in understanding how computers process logic. (Though I assume at least arm devices probably don't use one meter tall pistons/j)

[@patfre]

The reason you can go so fast in a boat before it kicks you is because when you sit in it on blue ice you can go really fast but if it looked at the default max boat speed it would kick people who didn’t hack

[@noir9235]

This isn't true, vanilla minecraft doesn't include a speed check.

[@nathankrehbiel105]

@@noir9235 He is running a Paper server.

[@noir9235]

@engineer gaming Nope that's not a movement speed check that is just the server waiting for a confirm teleport packet.

[@noir9235]

@@nathankrehbiel105 paper doesn't add a squared move check but does include the extraneous movement check from spigot.

[@noir9235]

@engineer gaming 8 blocks a packet not a second you can simply send more move packets at smaller intervals

[@misspotato813]

I can't remember the exact reason a noteblock was used over say a chest, but I'm pretty sure it's performance related. Chests are pretty laggy in terms of client render. I also assume there are way less validity checks the noteblocks have to make. Chests check if they're connected to another chest, if it has a cat is on top of it, if it has a block on top of it, etc. A noteblock only checks if it has a block ontop of it.

[@LiveOverflow]

I assumed there must be a reason like that. Makes sense :)

[@char8169]

A cat??

[@HritikV]

@@char8169 i guess chest with a cat on top of it just opens normally and kicks the cat

[@malbacato91]

@@HritikV nope - cats block chests opening, just like solid blocks. cats also have it as part of their AI to sit on chests and beds. not a very well known interaction but it's quite old

[@CeilingPanda]

Minecraft dev, but I'm just relaying what I've heard, chests needs to be "ready" to be animated at any point so they are way more laggy.

[@alexander3293]

the fall damage is actually calculated on the diff between the heighest point of the time you were flying and the landing y pos you can set the onground boolean on some movement packets and the server will reset "the heighest point"

[@Kynatosh]

I am not sure.. if you hang something on a rope for a long time it will bounce, the fall damage will add up and when they will fall they will get a lot of fall damage (at least it was like this in 1.8 I believe)

[@checkmate1284]

@Kynatosh I don’t believe the entity would ever be “on ground”, thus never sending the required packet to reset the highest point.

[@tr7zw]

Added to this, just setting the onGround flag in each movement packet basically lets you fly all the time without the y velocity every so often, and without any fall damage(since for the server you are "on the ground", so neither falldmg or the flyhack check gets triggered).

[@RigelNarcissus]

@@tr7zw I don't think that's true, but i cant dig through the source to confirm right now. I remember however that standing on solid ghost blocks would get you kicked after a while, so the "on ground" flag would def be set to true, while the y velocity would be zero. Though this is all for older versions than 1.18.2, I don't know if this holds true for that version, though I bet it does. I might look into this later if nobody else does :B

[@DefineOutside]

The client is authoritative about their ground status. This is to stop fall damage when a player is jumping up and down on ghost blocks, for example. Additionally, it's likely mojang has just never gotten around to fixing minecraft's netcode as it seems like they only care about singleplayer, most of their netcode only really works at 0 ping anyways and even then it barely works and is all around terribly designed. Fall damage is added when an entity goes downwards. Going upwards doesn't change fall damage at all. You can die from a 1 meter fall if you go up and down rapidly 40 times without touching the ground. One funny way to stop fall damage is to never touch the ground. sending onGround = false every tick bypasses some anticheats who only check for faking being on the ground. it's the simplest method to never take fall damage. Also sending onGround = true every few packets resets fall damage in vanilla and works.

[@Lougehrig10]

11:58 FYI, villagers have an internal inventory. They will only share food if they have enough food to share. This mightve been why they werent sharing. Also, are you aware of update suppression? I find it fascinating as it is exploiting a stack overflow exception handling routine in the code to deliberately prevent certain lines of code from running.

[@brxne]

Update suppression regarding what?

[@DanielLiNeutrinos]

@@brxne I think one example is removing the nether portal obsidian without breaking the portal, I learned this from one of scicraft builds exploiting this

[@BastetFurry]

@@brxne Check out docm77 exploiting the living hell out of this the last and current Hermitcraft. According to Mojang it will be fixed in 1.19 tough.

[@brxne]

@@BastetFurry Wow, first time seeing/hearing about this. Thanks, it's wild.

[@ElrondTheGreat]

Even though my first language is Persian and my English isn't perfect, it's clear how passionate you are about the mechanics. Your teaching is really deep and insightful. As a Minecraft fan and a computer science student who's also into programming and security, I find your content super valuable and enjoyable. Thanks for sharing your knowledge!

[@gazehound]

You should write a NoFallDamage hack! That one's pretty interesting- the server keeps track of how many blocks you have descended without your character being grounded.

[@ees4.]

You can also just reverse the fly hack: send occasional packets upward.

[@Soykaf_]

I just wanted to say, I love this series. it's a great introduction to hacking explained using a really fun subject that almost everyone can relate to.

[@kubakakauko]

Hands down my favorite series on youtube. Keep it going!!!

[@tristanmacc]

i love this series so much, please keep it up

[@dabrick100]

I love this series! I've always wanted to learn Minecraft modding, but it's always seemed so daunting. Seeing you go through the beginner steps has motivated me to as well! Danke Freund!

[@rx97_mc]

I'm loving this series please continue! I hope you cover the cool built-in datapacks and resourcepacks as they are insane for customizing the game without code!

[@lennyphoenixc]

Just wanted to say I love the idea behind this series, keep it up

[@MaheshDodke]

Loving the series 🤗

[@KentHambrock]

I'm loving this new series, it deserves so many more views than it's been getting.

[@LionBrine]

Love this series!!! Amazing job

[@emblemi6345]

00:46 liveoverflow goes phishing _:_ he's a full hax0r now!

[@SuperNeon4ik]

I love these series. your content is just on the another level.

[@beersforever]

Really enjoyable videos, thanks for posting these.

[@m4rt_]

22:50 I think that is because people have made contraptions that make you go fast, and they don't want to break that.

[@evgenkonyshock4913]

This is the best series ever. Do more!

[@eswee6780]

great video as always! A very minor reason to not use chests in fish farms may be because chests are what's known as tile entities; they need to be able to store data whereas note blocks just have sort of a 'different block' coded in for each different note in modern versions. This could maybe cost a bit more computing power when chests are loaded, though I don't see a reason for the game to run code for idle chests that are already loaded, which is why I think people (myself included) just use note blocks because they didn't know you could use chests instead.

[@Maxjoker98]

I really like these videos. Keep it up!

[@darraghd493]

4:59, it’s more common for noteblocks to be used in redstoning than chests so it’s likely that it was just a first idea and then stuck that way.

[@EliteSparklz]

Its also not a contanerized entity, you are right that noteblocks are common but the reason for that is to prevent lag. No inventory on a block reduces lag (Doesnt really matter with this small 1 off contraption, but that's the history of it)

[@elliot_yoyo]

Great series, great work ! Danke :)

[@krestofelo8757]

I really like the way you tell about your experience in making hacks for the game I played for years, It really inspires me to tackle with it too. Only thing distracting my interest is the parts where you switch to normal gameplay and\or explaining simple concepts way to long, as if for some newby (not to offend anybody). But overall impression from the video is still amazing, so keep going, it's really interesting content!

[@NilesBlackX]

This is just an excellent video series on all counts

[@Reeces_Pieces]

I'm really loving this series.

[@joiscode3832]

This is realy cool. Its good to learn on what you love. Right now im learning via a few ctfs but picoctf is what im most addicted to

[@user-tk4nv7zy6z]

I cant wait next episode! It's Amazinig!!!!!!!

[@Brewt_]

12:36 LOOK AT THE RIGHT AHHH

[@hasnieking]

I love how you are doing basically the opposite of me. My first 'big' coding project was a Minecraft mod back when I was 14 years old or something, for version 1.5. Before that I only had made some websites with basic HTML. I followed a KZbin series for the mod as I had no experience in any other language than HTML, but I really loved it. I think that project is one of the reasons I am where I am now. Now I'm following Computer Science at university and am mainly interested in cyber security, and almost graduating! It's really fun to see how Minecraft modding nowadays is done really different than back in the days (as far as I can remember). A modloader called Forge was used in my time mainly, which I think was based on decompiled code as well, but would replace some original code.

[@DavidCampbellIII]

12:56 anyone else notice that old familar face standing off to the right?

[@ziccodx]

Wow, interestingly, this feels much more fun then creative since you had to work your way up, research, write code to enable these functions. Great work and dang it's enticing me to try much more than the analytical web hacking videos. I'm a game dev, so that's probably why.

[@heitormbonfim]

Man, I'm just loving it, you're a genius

[@fabriperoconalgomasytodojunto]

You're amazing dude. I love this video

[@SoicBR]

23:55 code a NoFall hack. It's possible to use a NoFall hack to completely bypass fall damage and it's present in various open-source utility mods

[@davidawesome0248]

If you want to try it, here is how to fix fall damage. Your fist video on quarry exited me and now I am trying to make a hacked client using only that; It turns out is is very easy to override the advancements and show a chest. I have also made a anti-fall damage mode in it, all you have to do is hook into the movement and rotation packets. They send if the player is on ground, if this is always true no fall damage is calculated

[@9maxmaz]

i think if u send packet falling down to server and fly up to position u fake falldown its should be stable to stand in the air infinitely for the client

[@ivankatalenic]

Great educational and fun video. I've never tried developing mods for Minecraft (or any game), and now once I saw your video it seems extremely easy (well, at least for Java, and Minecraft 😄). Thanks for sharing the knowledge, but also, it's not all great since people will now exploit this to develop even more hacks for this incredible game. I always had problems with cheaters while playing Minecraft with friends on a public server since it was rarely fair play, and I strongly wished it was. If I were to start playing it again, I'd consider creating anticheat software for it. 😃

[@RiesenpiIz]

Es sollte eigendlich auch ein scheduler geben, den du benutzten kannst und statt deine eigene flying logic hättest du isFlying vom Spieler auf true setet können und dann versuchen die flying check zu umgehen. Trotzem gutes vid :D

[@darki741]

Bester mann kannst miese gut erkären und sehr gut englisch ohne den aktzent hätte ich nicht gedacht du wärst deutsch

[@gargshadowofficial8750]

About the inventing a 1.19 fishing farm chapter of the video you should really look into different ways of implementing vertical redstone. there are a lot of cool solutions of instantly transmitting signals using block updates and observers

[@iteragami5078]

Rays Works already showcased a compact design for a treasure AFK fish farm using skulk sensor, so thankfully, he doesn't need to worry about instant redstone.

[@TheStiepen]

One Thing you could easily bypass for years on a vanilla server (though not bukkit/spigot) was Fall damage, simply by making the client send onGround = true, even when not actually on the ground. How Fall damage was calculated was basically talking a snapshot of your y position when setting onGround = false and when it went back to true, it would calculate how far you have fallen, subtract 3, and then that's the amount of damage you take.

[@xXDarkRevolutionHDXx]

Btw fabric has an inbuilt config thing too. Many mods use that

[@Furetto126]

what do you mean by that?

[@1e1001]

@@Furetto126 (it's not actually built-in but) with the modmenu mod you can pretty easily add a configuration screen to your mod,

[@Furetto126]

@@1e1001 thx for explaining

[@xXDarkRevolutionHDXx]

@@1e1001 oh right yes it's with mod menu.. but ye that's the go to way to make configs on fabric :D

[@billymays8864]

this is really helpful

[@BaxAndrei]

20:21 the first one will check If You are in Air when loggin in, I Guess. I saw it few times on my server when players logged out while /Fly was enabled then disabled on reconnect.

[@Povilaz]

Very interesting.

[@Lichtx]

best Minecraft channel on KZbin

[@thecrazymoon6578]

You are very good at explaining

[@Modslover]

I'm sure this would be easy, since you are flying into dark caves what if you had night vision? Maybe even a toggle one and off at certain light levels? What other effects could you have? Maybe feather falling for .5 secs before you land so you don't take damage from flying?

[@jesseb0rn51]

Nice touch with the herobrine at 12:44

[@DarmiGames]

In the next episode, you shold explore fall damage, and try to do nofall. It'd really go hand in hand with flying.

[@rick-sanchez]

Probably too late for the series but you can use F3+H to render hitboxes. Useful when explaining the fish farm. There are also other shortcuts press F3+Q to list them all in chat.

[@Plyrs]

ok i played minecraft for years and never understands how that afk fishing works. but this video changes everything and blow my mind

[@thisconnectd]

I remember when I first had an Eureka in Minecraft when a parkour mod (climbing fences I think) worked in multiplayer

[@nrliii]

Yeah movement mods would work on servers with some old ass anti cheat

[@Xylight]

Are you using shaders? That ambient occlusion is oddly satisfying

[@4cps777]

The reason why the boat fly works is the fact that 2bt2 use an outdated and custom version of NCP. Now the problem with this is the fact that 2bt2 is on 1.12 and vehicles are controlled by the client on versions 1.9 and above. Before that, the client would just send the key presses (specifically by sending location updates with hardcoded values) and the server would move the vehicle accordingly. This, however, meant that anti cheats also didn't check the player when they were moving in a vehicle (since their movement was controlled by the server) and continued to not check the movement even after the update. They of course fixed the exploit after the exploit became public, but vehicles in general are a bit tricky to say the least (For example, I later discovered that leaving a vehicle enabled you to perform arbitrary movements for one tick on AAC3, AAC4 and Intave 13, with the latter two being the latest versions of those specific anti cheats at the time). The reason why the vanilla fly check doesn't kick in is the fact that dedicated anti cheats need to disable the vanilla anti cheat because not doing so would allow a range of other exploits (eg packet fly).

[@frekafrekason5457]

I love the little easter eggs like the hidden herobrine

[@etopowertwon]

You know what also would be fun to watch -- the opposite videos, where you try to build server-side plugins that either prevent flying/lag machines or at least log sus players and log/record their activity.

[@kj4derEchte]

i want a tshirt with the citate: "Definitions of words are bullshit anyway"

[@cyan2048]

LiveOverflow playing Minecraft is just the cutest thing I have ever witnessed in my entire life

[@nirui.o]

"and they producted a baby" Ah, the straight forward honesty the world deserve. 🤣

[@einsjannis]

Amazing educational content, I don't think theres anyone else making cyber security this approchable, thanks a lot man

[@coffee-is-power]

the isOnGround variable is set from the client and can be spoofed

[@Elementening]

what shaders/configs are you using? it looks really vanilla and cool

[@Cryptizism]

You should stream 1 of these videos so we can get a more in depth view of your thinking process

[@etopowertwon]

Wait. Now you unironically entered the circle of my favorite minecraft players. Please do more explanations of the farms. Also server does checks the speed somewhere, I know it as it sometimes give false positives. There's a mod, called PSI that allows you to create spells. You can create a spell which propels you so quickly, server literally reverts your position to the point where you started the movement.

[@monkaSisLife]

You can do a no fall damage hack, which is pretty easy, if I remember correctly hacking clients just prevent the fall damage packet from being sent

[@JasonSquirrels]

4:30 I wonder why people don't just use a chest instead of a noteblock in the AFK-fish farm. If you put a block on top of the chest, it will act the same way as the noteblock, but it is cheaper to craft.

[@QuietStorm4964]

Liveoverflow modpack for Minecraft sounds dope

[@bylin04]

5:01, not sure exactly how the fishing mechanics work when trying to get treasure, but could'nt you just build the farm in the middle of the ocean with the flowing water connected to the sea so that you can farm treasures too?

[@EliteSparklz]

Game checks for ANY non water blocks around the bobber in a 5x5x4 or some range, if it detects any non water or air block you cannot get treasure

[@synctic]

I have a question do I need both the mixin one and the normal one so I mean when liveoverflow did the flying mod he just shows the normal one so what is the mixin used for?

[@yusus_]

its for tick funktion... i think

[@S4ber_]

Good Video

[@samo_lego8465]

Fall damage can be really easily negated, as there's a boolean value in the move packet if player is on ground. Server blindly accepts it and doesn't apply any fall damage if it is set to true ("as player is on ground anyways" :P )

[@flakanec666]

LifeOverflow: Maybe players use boat fly hacks because when player sits in boat flying is not detected Me: Gets kicked while chilling in boat

[@real1cytv]

So from what I remember boatflying was actually an exploit to bypass the 2b2t anticheat plugin. The reason hausmaster doesn't want people to fly is because it absolutely TANKs the server performance if people are flying fast and constantly loading new chunks etc. There were also other really cool methods to fly (for example riding a pig, which is why you used to have pig spawners in the nether)

[@fritzfahrmann4730]

I like the new series, however it feels a little bit "thinner" than the pwnadeventure series. maybe it is possible to add more programming/hacking content?

[@clubpurpel4003]

For some reason the 'public void tick(...) {' line doesn't work for me. The tick bit is gray for me, whereas for him it's yellow. Also I tried putting some debugs in and the one right after tick doesn't send a message.

[@corpsecoder5216]

from cybersecurity to minecraft this is history right here

[@MCLooyverse]

I keep forgetting that I'm listening to LiveOverflow, not ilmango. You guys don't really sound the same, but ilmango was the only German technical Minecraft player I watched, until now.

[@jonathanschenck8154]

Maybe a shulkerbox could work like the chest. Barrels are not going to be grate for fishing.

[@Spiralem]

If flying is detected via Vertical Velocity checks, wouldn't TNT cannon cause you to be booted from the server?

[@ZucchiZ]

When a computer scientist plays Minecraft

[@Bartek2OO219]

I think that injection into bobber entity is bad idea because when you play on servers you can have multiple entities of that kind

[@mic27381]

I didn’t realise that all those features (eg sculk sensor) existed for that long…

[@LukenSkyne]

You could look into how falldamage is calculated and applied :D

[@webentwicklungmitrobinspan6935]

i love that you teach this with minecraft, what a great way to help young people discover cyber security! edit: dude you are getting me hooked into java altough i hated it for the time i was in university

[@Redstoneprojrjr]

Making a nofall module would be very easy :)

[@ItsGlucose]

Take a look in qnti fly plugins, they doesn't allow player to float.

[@Megaheropap]

Please do more Minecraft cyber security videos and your thought process

[@jordon_]

try spoofing the client sending whether its on ground, does that change anything? (Minecraft - atleast used to i dont think it still does but it might - trusts the client sending whether its on ground. With this you can make a no fall damage hack by spoofing that you're "on ground". (there's also other methods but thats a simple one and it works as far as im aware)

[@m4rt_]

the trick is to slowly fall downwards, and not stay still in mid air. that's how you bypass the minecraft flight check thing

[@nitaki_]

Would it be possible to get access to the Flying code?

[@BodyAlhoha]

Now, why you don't make that fly bypass using packets ^^

[@greatgamegal]

Do striders count as vehicles? Can you maybe fly a strider stack if you do while (object.hasVehicle()) instead of if (client.player.hasVehicle())? Edit: You could just call client.player.getRootVehicle() apparently to define object. It defines entity as "this" in the beginning, then does a while entity.hasVehicle so it should return the entity you called it on if the entity isn't riding a vehicle.

[@convince_me]

How can I make the tick function work???