p0f fails to start with socket error

Symptoms

The p0f service fails to start, and this error appears when you run /scripts/restartsrv_p0f:

SYSTEM ERROR : bind() on '/var/cpanel/userhomes/cpanelconnecttrack/p0f.socket' failed.

Description

This error appears because the /var/cpanel/userhomes/cpanelconnecttrack directory is missing:

[root@server]# ls -l /var/cpanel/userhomes/cpanelconnecttrack/
ls: cannot access /var/cpanel/userhomes/cpanelconnecttrack/: No such file or directory

Workaround

Recreate the /var/cpanel/userhomes/cpanelconnecttrack directory, and assign it the proper ownership and permissions:

[root@server]# mkdir /var/cpanel/userhomes/cpanelconnecttrack
[root@server]# chown cpanelconnecttrack:cpanelconnecttrack /var/cpanel/userhomes/cpanelconnecttrack
[root@server]# chmod 0711 /var/cpanel/userhomes/cpanelconnecttrack/
[root@server]# ls -ld /var/cpanel/userhomes/cpanelconnecttrack/
drwx--x--x 2 cpanelconnecttrack cpanelconnecttrack 4096 2020-11-17 01:34 /var/cpanel/userhomes/cpanelconnecttrack/