On Sunday 26 December 2004 10:33, Gabor Szabo wrote:
> I am trying to secure a new server and as I am not an a real
> security expert I'd be glad to get some inuput.
> This is a Fedore-3 based server (I already shut down cupd -
> why do they need this in a server anyway ?)
> I ran nmap on the server and got this:
>
> Port       State       Service
> 22/tcp     open        ssh
> 55/tcp     filtered    isi-gl
> 80/tcp     open        http
> 135/tcp    filtered    loc-srv
> 137/tcp    filtered    netbios-ns
> 138/tcp    filtered    netbios-dgm
> 139/tcp    filtered    netbios-ssn
> 225/tcp    open        unknown
> 443/tcp    open        https
> 445/tcp    filtered    microsoft-ds
> 4444/tcp   filtered    krb524
> 12345/tcp  filtered    NetBus
> 12346/tcp  filtered    NetBus
> 27374/tcp  filtered    subseven
>
>
> Port 22 and 80 are OK
> I guess I'll have to shut down the betbios and microsft-ds things,
> what are these? Samba ?
man nmap:
"Filtered means that a firewall, filter, or other network obstacle is covering 
the port and preventing nmap from determining whether the port is open."

Your firewall probably filters these ports (but verify this in your FW 
configuration).

Dotan.
>
>
> I was surprised to see NetBus ports. I though this meant my server was
> *already* broken in (this is a brand new machine).
>
> Any specific RTFM would be also appreciated.
>
> Gabor
>
>
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