Comment 1 for bug 1548432

I forgot to mention the most annoying aspect of the bug, which is that there is no workaround.

If I change rkhunter's configuration file to use "permitrootlogin" (all lower-case), somewhat unsurprisingly, the problem still occurs.

[09:34:26] Info: Found SSH /etc/ssh/sshd_config configuration file:
[09:34:26] Info: Rkhunter option ALLOW_SSH_ROOT_USER set to 'permitrootlogin'.
[09:34:26] Info: Rkhunter option ALLOW_SSH_PROT_V1 set to '0'.
[09:34:26] Checking if SSH root access is allowed [ Warning ]
[09:34:26] Warning: The SSH and rkhunter configuration options should be the same:
[09:34:26] SSH configuration option 'PermitRootLogin': yes
[09:34:26] Rkhunter configuration option 'ALLOW_SSH_ROOT_USER': permitrootlogin

But, surely, if we change the directive in the SSH configuration file, and even restart the SSH daemon, the problem will be solved! Nope, wrong.

[09:39:11] Info: Found SSH /etc/ssh/sshd_config configuration file:
[09:39:11] Info: Rkhunter option ALLOW_SSH_ROOT_USER set to 'permitrootlogin'.
[09:39:11] Info: Rkhunter option ALLOW_SSH_PROT_V1 set to '0'.
[09:39:11] Checking if SSH root access is allowed [ Warning ]
[09:39:11] Warning: The SSH and rkhunter configuration options should be the same:
[09:39:11] SSH configuration option 'PermitRootLogin': yes # <--- This is wrong! The sshd_config file contains "permitrootlogin"!
[09:39:11] Rkhunter configuration option 'ALLOW_SSH_ROOT_USER': permitrootlogin

So, we're stuck with a warning on every run, with no means by which to suppress it effectively. This renders the tool useless.