fail2ban version 0.11.1 not supported

[kamilkobak]

In Docker version:

This is fail2ban-dashboard v0.7.1 (5aaa722acc7)
2025/12/22 10:28:55.104915 fail2ban-dashboard.go:127: [Info] Will use socket at /var/run/fail2ban/fail2ban.sock for fail2ban connection
2025/12/22 10:28:55.106908 fail2ban-dashboard.go:141: [Info] fail2ban version found: 0.11.1
2025/12/22 10:28:55.106938 fail2ban-dashboard.go:150: [Error] fail2ban version 0.11.1 not supported

[michalkulik]

similar problem:

`This is fail2ban-dashboard v0.7.1 (5aaa722acc7)

2025/12/27 13:47:44.765820 fail2ban-dashboard.go:127: [Info] Will use socket at /var/run/fail2ban/fail2ban.sock for fail2ban connection

2025/12/27 13:47:44.772878 fail2ban-dashboard.go:141: [Info] fail2ban version found: 1.0.2

2025/12/27 13:47:44.772908 fail2ban-dashboard.go:150: [Error] fail2ban version 1.0.2 not supported`

[jeantoussaint1-sketch]

Same issue.

2026/01/02 14:07:31.113927 fail2ban-dashboard.go:127: [Info] Will use socket at /var/run/fail2ban/fail2ban.sock for fail2ban connection
2026/01/02 14:07:31.115196 fail2ban-dashboard.go:141: [Info] fail2ban version found: 1.0.2
2026/01/02 14:07:31.115224 fail2ban-dashboard.go:150: [Error] fail2ban version 1.0.2 not supported

[giftkugel]

fail2ban version 1.1.0 is the most recent one. Right now I am only able to test this version and checking for that version.
You may consider updating your fail2ban.

If an update is not possible, I've added the --skip-version-check flag to fail2ban-dashboard version 0.7.2 which will disable this check. Use it at own risk as I don't know whether the communication will work for older versions.

The check can also be disabled with the environment variable F2BD_SKIP_VERSION_CHECK=true.

Would be awesome when some of you could report whether the fail2ban-dashboard is able to communicate with specific fail2ban versions or not.

Happy testing 🙌

[jeantoussaint1-sketch]

I got everything working.
It was running for 2 weeks.
Last week, Fail2ban was failing. After reinstalling, retry's, I could nog get Fail2ban working anymore.

I removed all the filters, jails and Fail2ban was running again.
After restarting the dashboard, fail2ban again stopped (without jails, filters).

After disabling all the jails, reinstall the jails (only fail2ban), no issues. After reinstalling the dashboard, Fail2ban stopped again.
No errors....

[giftkugel]

Which fail2ban version did you use?

[jeantoussaint1-sketch]

Version 1.02
Ubuntu 24.04

[giftkugel]

@jeantoussaint1-sketch I do not understand how the fail2ban-dashboard was working for you since 2 weeks with fail2ban version 1.0.2 as the fail2ban-dashboard was only supporting fail2ban version 1.1.0 until 23th of January 2026. 🤷🏼

Only fail2ban-dashboard version 0.7.2 and above can deal with fail2ban older then 1.1.0. In fail2ban-dashboard version 0.7.2 with the --skip-version-check flag, in version fail2ban-dashboard version 0.7.3 and above because it was tested and is now supported by default.

In general fail2ban-dashboard should not be responsible for fail2ban crashes at all. The fail2ban-dashboard only reads data from fail2ban via socket. No data is send.

Which version of fail2ban-dashboard are you using, and how did you install it? 🤔

Wondering whether the new fail2ban-dashboard versions are working for @kamilkobak or @michalkulik

[giftkugel]

After months of being stale, I will close this issue.