Introduction to Docker for CTFs 

Who felt triggered by me using python2?

liveoverflow : docker tutorial everyone: where r u these days ?

I made a docker-like program (called doqueru-kun) and a tutorial that made me understand how docker works. Waiting for your next video to link it in my project!

You could use a bridge network for inter-container communication. With it you don't need to expose any port to the local network and can use the name of the container as IP address

Please explain Ctrl-C and Ctrl-V.

>beginning of video: Docker. Docker container. Docker. >Middle of video: docker docks docking docks docker dock >end of video: dakka dakka durka durka docka docka dock i think im going insane XD

When using VSCode there is that awesome plugin that runs your current workspace on docker, so the set up is much easier and the development is much cleaner.

Useful information as always. Thanks LiveOverflow

So, basically Docker is like a solution to "works on my machine ¯\_(ツ)_/¯" syndrome. 😛

Great way of explaining things, kudos to you!!

holy crap. nice animation.. very descriptive.. do this more often..

Love docker, especially when I'm working on a M1 Mac book and need to install tools developed for linux...

Dockers are truly a gift for CTFs. I love them so much. And the best thing is that Docker Engine was written in Go!

if u want your last container to execute an arbitrary command, you can prefix the command with docker exec -it $(docker ps -lq) maybe someone reads this and finds it useful (in an automated setup ofcourse)

Loved it, this was awesome and now I know what to use! Thx

Hey, a video around pwntools would be awesome!

Keep doing what you are doing! Greets from Germany :-)

Awesome Work Man! Good content

Welcome back pro

*he bacc*

If you want to run something on the host machine ip from a container you don't need to look for the ip you can just use host.docker.internal :)

This intro to docker has made the most sense out of every other explanation I have been given, but I still don't get what the difference between this and a VM is.

Ehh Welcome Back! MIssed you, dude!

Minor correction: Docker on Windows can run without Linux, but usually doesn't

That's cool

`docker-compose` is its own package and ‘docker compose` is just docker with the compose plugin, which comes by default. You shouldn’t need the docker-compose package if all you’re doing is basic compose launching.

Didn't undertsnad half of the video. But the video is still good, ty

finally a new video

I'm used to use Netcup for servers because a) it's a german service so the data is stored in germany and b) from what I had seen it seemed far less expansive even considering the free bonus I get as a student or by such promotions.

Miss your videos

L33t is back :)

I have a container setup with the Kali Linux Desktop Environment running and I use Reminna to access it; But it slows my machine done as much as a VM does.

Any good ctf list to download I need many of them

Please don't run your docker commands as root. That can break some docker images. It is way better to add your user to the docker group, which will give you (for docker) pretty much the same abilities. There is also a really nice utility called ctop(github/bcicen/ctop) which is pretty much htop for docker. Also, look into docker registries (for example hosted on GitLab) to save your Docker images so you don't have to recompile them every time. Also using networks or the deprecated link flag can save you the trouble of exposing hosts to the outside world, and can make it a lot more comprehensible to see which container is connecting to which.

Have you heared about hetzner.de? It is basically like digital ocean but cheaper. They have server farms in Germany and Finland.

thx for the vid

Could you please tell in future video the differences between Packer, Vagrant and Docker? Awesome video! :P

Hey, ist da ein weg um mit dir zu kommunizieren? habe heute möglicherweise einen iteresanten bug gefunden in einem Parkautomaten. Muss aber mal wieder zurück und austesten ob das wirklich so jedesmal funktioniert. Wenn ja, dann gibt es einen weg um ohne zu bezahlen aus dem parkhaus raus zufahren;)

Hi, I have a problem using ctfdocker ---- when using "gdb.attach(io)" with pwntools, how Launch a new terminal in docker container?

💥💥💥

wow this looks so complicated, Makes me hate hacking 😕

Can I use docker for doing CTFs? Many recommend using a VM to participate in CTFs for security purposes. But are docker containers more secure than a VM sandbox?

The digital ocean refferral link didnt work for me :((

This is more than docker documentation

Don't use `sudo` to run docker commands! add your user to the `docker` group instead, no more nagging for passwords for using docker!

Not (necessarily) true: "Docker on Windows runs a hidden Linux VM" The Windows kernel actually supports something quite similar to the Linux namespaces thingy, called "Containers". When using Docker in Container mode on Windows, no VM is necessary or used. In fact this feature even enables Windows to be able to run both Linux Containers AND Windows containers (yes, you can download and run a Windows 10 container) side-by-side simultaneously.

nice content, @liveoverflow I have been following for a while an I have been wanting to start playing RE/ ctf's and I suck at it, I have been looking for a strong basics where I can start and get a hold of the sub, please refer a source since you are good at it I was hoping you would know a better place to begin for a noon.

how to doing like gdb.attach on docker ?

Damn. Awesome. Time to spend the day trawling through docker docs and learning. This is wouldnt work for anything with a gui right? Like a crackme with a window pop up for a password would just have to run on your main host wouldnt it?

Finallyyyyyyyy

Gasp running docker as super user

What's CTF?

Is it possible to expose ports for one container to be used by other containers, without exposing it to the host system?

apt-get install docker.io docker-compose -y

what is ctfs?

Perhaps first?

9:58 WHY PYTHON 2??

All IT work should be security work.

Hi

13th

It should work on windows. Well yes but actually no.

I think docker is silly. Why would you download and set up a whole thing that's basically a chroot, just to run some tool? If you don't trust that software then yes, fine. But other than sandboxing, I don't think it's useful for tooling. Maybe I'm thinking about this wrong, but why would i have a container for hashcat and another container for jtr and another container for nmap and another for wfuzz, and so forth. It makes no sense and all you accomplish is wasting your hard drive space on redundant data. And don't tell me that's not how it works, because you literally install stuff with `docker pull`, creating one container image for the one tool you pulled. If you just want a linux environment, feel free to use linux. If you're running on windows you get WSL2. If you are running on mac, get a computer that works and where you don't have to pay for every little thing.

I have actually seen way better docker videos...kind of disappointed.

OK, if you starting with docker, you probably want to know that: 8:55 When you start container you can ofc give it a name with `--name some_name` (if you do not give any name it will assign some radom one, in this case it was `cool_yonath`) later if you want to exec something it there, instead of using id, you can use that name. Also if you are using if, you don't need to use full id (in fact that id that is displayed when you use `docker ps` is also first 12 characters of id) you need to use enough characters to have single matching result (it might be even only 1 character) ps: if you using distro with selinux enabled, mount your volumes with `:z` at the end, eg: `-v $PWD:/pwd:z` ps2: if you run container with `--link container_name:hostname` you are getting connectivity to mentioned container (`ping hostname`)

Docker is just amazing, Kubernetees is the next step

nc host.docker.internal 1024 (instead of finding the IP address of host), or just use the host network when creating the container

Looking forward to the next video. (Also Holy shit, I have the green icon now)

Can you update this man

I was wondering what docker was!

Docker Docs are actually too much to lean food someone not too familiar with it. It can be frustrating and a waste of time. I’d recommend some videos from RU-vid to help you with it

I guess using WSL is perfectly fine if not better in this particular use case? A Windows user's point of view

dumb question, what is CTF??

hi first

Nice x)

CT-Who?

these videos are amazing, keep up the great work.

Great video, for me Docker already starts to feel a old tech , because I am already working with Docker for 2 years but it is so rare to see videos for new guys talking about docker. But side note, in the first time you talk about the docker build command was to create a container that it is incorrect, but I think that was just a little mistake