Fail2Ban Error

Webmin
1

Dear All,
I am using software as follows.

Webmin 1.8 x
fail2ban 0.9.3
ubuntu 16.x

now the problem is when i start fail2ban service in default mode. i get this error message.

Feb 9 14:05:13 Ubuntu-1604-xenial-64-minimal fail2ban-client[6738]: ERROR Failed during configuration: Bad value substitution: option ‘backend’ in section ‘sshd’ contains an interpolation key ‘sshd_backend’ which is not a valid option name. Raw value: ‘%(sshd_backend)s’

would you guys please help.

Thanks,
Yousuf

2

Post the content of your f2b conf files or local in case you followed the proper setup of f2b as conf files get overwritten during the updates.