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driverdave 20th December 2010 09:58

Fail2ban is not installed at this server - Centos 5.5 64 bit
followed the guide posted below

centos 5.5, 64bit, ispconfig

i've installed fail2ban, it's running, but does not appear to be doing anything. contents of fail2ban.log are empty.

ispconfig tells me "fail2ban is not installed at this server."

i believe the problem is that the fail2ban binary is not in my path.

here is the output of some which commands


which fail2ban
/usr/bin/which: no fail2ban in (/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)

which fail2ban-server

which fail2ban-client

my problem is i have no idea what the fail2ban binary is, or where it's located.

any help would be greatly appreciated.

till 20th December 2010 19:06

ISPConfig checks for fail2ban with the command:

which fail2ban-client

driverdave 20th December 2010 19:17

hi till,

thanks. here is the output of that command on my system

which fail2ban-client

log file location is: /var/log/fail2ban.log

i'm not sure what else to check for.

- dave

falko 21st December 2010 17:14

Did you disable SELinux?

driverdave 21st December 2010 19:54

SELinux was disabled by doing the following

ran the command: system-config-securitylevel

set the following.

Security Level: ( ) Enabled (*) Disabled

SELinux: Disabled

then selected OK, followed by a reboot.

tuxlux 21st December 2010 20:39

Try to make a link for fail2ban in /usr/bin to fail2ban-client.

The script does not recognize fail2ban on CentOS, at least not on my 5.5 install, without the link. I have seen specific testing is done in /usr/local/ispconfig/server/mods-available/ for CentOS to find fail2ban and that checks for 'which fail2ban'.

Still investigating this, but could be something to do with the fact that on my install, 5.5 is not recognized as CentOS, but as RedHat unknown....

driverdave 22nd December 2010 01:37


i made a symlink to fail2ban-client

ln -s /usr/bin/fail2ban-client /usr/bin/fail2ban

rebooted, ran the ispconfig update in the installer directory. ispconfig is still showing the message "fail2ban is not installed at this server."

output of which fail2ban is now

which fail2ban

fail2ban is running, as far as i can tell.

service fail2ban status
Fail2ban (pid 4498) is running...
|- Number of jail: 0
`- Jail list:

tuxlux 22nd December 2010 02:11

Yes, fail2ban is running but not configured with any jails. So currently it does not do anything.

Please check if you have a readable /var/log/fail2ban.log with content inside.

driverdave 22nd December 2010 02:55

hi marco,

i do have a log file in /var/log/

-rw------- 1 root root 0 Dec 16 22:15 fail2ban.log

it's empty.

tuxlux 22nd December 2010 11:24

Configure a jail in fail2ban and make sure logging output will be in the logfile.

The table for monitoring in the dbispconfig mysql db will not be updated if there is no logging and the "fail2ban not installed" error keeps returning.

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