[NTLUG:Discuss] port 22 "filtered"

[Victor Brilon]

Is sshd running as a daemon or from xinetd? If it's the latter check 
/etc/hosts.deny

terry wrote:
> cannot ssh to a (Fedora core1) PC, even though sshd IS running on that 
> machine, and 'ssh localhost' DOES work [on that target machine].
> 
> nmap (from outside) reports port 22 is "filtered"
> (I have to run nmap with -P0 option)
> ie. nmap -P0 -p22  **.***.**.***
> Port       State       Service
> 22/tcp     filtered    ssh
> 
> So, how do I un-filter port 22 ?
>