Thanks to visit codestin.com
Credit goes to github.com

Skip to content

docker README adds fail2ban setup instrctions #7993

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

docker README adds fail2ban setup instrctions #7993

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
30 changes: 30 additions & 0 deletions docker/README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -147,6 +147,36 @@ Steps to upgrade Gogs with Docker:
- `docker rm gogs`
- Finally, create a container for the first time and don't forget to do the same for the volume and port mapping.

## Fail2ban

It's a bit tricky to setup fail2ban to protect sshd inside the container.

1. setup docker to use journald to log: `daemon.json`.
```json
{
"log-driver": "journald"
}
```
2. confirm gogs container's name and accessable with `journalctl -e CONTAINER_NAME=git-gogs-1`.
3. fail2ban accessable to journald (with `python3-systemd`, and `ipset`)
4. setup the following jail `/etc/fail2ban/jail.d/gogs.conf`
```
[gogs]
enabled = true
backend = systemd[journalflags=2]
port = ssh
findtime = 90m
bantime = 7d
maxretry = 5
chain = DOCKER-USER
banaction = iptables-ipset-proto6[blocktype=DROP,protocol=all]
journalmatch = CONTAINER_NAME=git-gogs-1
filter = sshd[__prefix_line="^\s*\S+\s+[^[]+\[\w+\]:[^\]]+\]:\s+", __pref="",_daemon=git-gogs-1]
ignoreip = 127.0.0.1/8 ::1
```

**Explain**: the jail adds ban rules into the iptables `DOCKER-USER` chain, which is located in filter-FORWARD chain, which is after a nat-PREROUTING (dest port already rewrited), so whatever port you set the container's external port (10022) is, the rule should match the to internal port (22, `port = ssh`).

## Known issues

- The docker container cannot currently be built on Raspberry 1 (armv6l) as our base image `alpine` does not have a `go` package available for this platform.
Expand Down