linuxserver/endlessh
Endlessh is an SSH tarpit that very slowly sends an endless, random SSH banner. It keeps SSH clients locked up for hours or even days at a time. The purpose is to put your real SSH server on another port and then let the script kiddies get stuck in this tarpit instead of bothering a real server.
Simply pulling
lscr.io/linuxserver/endlessh:latest should retrieve the correct image for your arch, but you can also pull specific arch images via tags.The architectures supported by this image are:
Architecture | Available | Tag |
|---|---|---|
x86-64 | ✅ | amd64-<version tag> |
arm64 | ✅ | arm64v8-<version tag> |
armhf | ✅ | arm32v7-<version tag> |
The app listens on the port mapped for ssh connections. To log to file, set the environment variable
LOGFILE to true and map a volume for /config. The logs will be under /config/logs/endlessh.To help you get started creating a container from this image you can either use docker-compose or the docker cli.
---
version: "2.1"
services:
endlessh:
image: lscr.io/linuxserver/endlessh:latest
container_name: endlessh
environment:
- PUID=1000
- PGID=1000
- TZ=Europe/London
- MSDELAY=10000 #optional
- MAXLINES=32 #optional
- MAXCLIENTS=4096 #optional
- LOGFILE=false #optional
- BINDFAMILY= #optional
volumes:
- /path/to/appdata:/config #optional
ports:
- 22:2222
restart: unless-stopped
docker run -d \
--name=endlessh \
-e PUID=1000 \
-e PGID=1000 \
-e TZ=Europe/London \
-e MSDELAY=10000 `#optional` \
-e MAXLINES=32 `#optional` \
-e MAXCLIENTS=4096 `#optional` \
-e LOGFILE=false `#optional` \
-e BINDFAMILY= `#optional` \
-p 22:2222 \
-v /path/to/appdata:/config `#optional` \
--restart unless-stopped \
lscr.io/linuxserver/endlessh:latest
Docker images are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate
<external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.Parameter | Function |
|---|---|
2222 | ssh port |
Env | Function |
|---|---|
PUID=1000 | for UserID - see below for explanation |
PGID=1000 | for GroupID - see below for explanation |
TZ=Europe/London | Specify a timezone to use EG Europe/London |
MSDELAY=10000 | The endless banner is sent one line at a time. This is the delay in milliseconds between individual lines. |
MAXLINES=32 | The length of each line is randomized. This controls the maximum length of each line. Shorter lines may keep clients on for longer if they give up after a certain number of bytes. |
MAXCLIENTS=4096 | Maximum number of connections to accept at a time. Connections beyond this are not immediately rejected, but will wait in the queue. |
LOGFILE=false | By default, the app logs to container log. If this is set to true, the log will be output to file under /config/logs/endlessh (/config needs to be mapped). |
BINDFAMILY= | By default, the app binds to IPv4 and IPv6 addresses. Set it to 4 or 6 to bind to IPv4 only or IPv6 only, respectively. Leave blank to bind to both. |
Volume | Function |
|---|---|
/config | Required if LOGFILE is set to true. |
Miscellaneous Options
You can set any environment variable from a file by using a special prepend
FILE__.As an example:
-e FILE__PASSWORD=/run/secrets/mysecretpassword
Will set the environment variable
PASSWORD based on the contents of the /run/secrets/mysecretpassword file.For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional
-e UMASK=022 setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up here before asking for support.When using volumes (
-v flags), permissions issues can arise between the host OS and the container, we avoid this issue by allowing you to specify the user PUID and group PGID.Ensure any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic.
In this instance
PUID=1000 and PGID=1000, to find yours use id user as below: $ id username
uid=1000(dockeruser) gid=1000(dockergroup) groups=1000(dockergroup)
We publish various Docker Mods to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.
- Shell access whilst the container is running:
docker exec -it endlessh /bin/bash
- To monitor the logs of the container in realtime:
docker logs -f endlessh
- Container version number
docker inspect -f '{{ index .Config.Labels "build_version" }}' endlessh
- Image version number
docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/endlessh:latest
- 23.09.22: - Migrate to s6v3.
- 20.07.22: - Rebase to Alpine 3.16.
- 16.04.22: - Rebase to Alpine 3.15.
- 07.10.21: - Fix typo on MAXLINES var.
- 08.06.21: - Add BINDFAMILY option.
- 16.04.21: - Initial Release.
Last modified 2mo ago