Open port

[William O'Higgins Witteman]

On Thu, Apr 27, 2006 at 10:02:07PM +0300, Peter wrote:
>
>On Thu, 27 Apr 2006, William O'Higgins Witteman wrote:
>
>>On Wed, Apr 26, 2006 at 08:08:42PM +0300, Peter wrote:
>>
>>>>What is the "unknown" process listening on 816?  I notice that this is
>>>>different port than it had before a reboot, but there was still an open
>>>>port (I think it had a port around 900-ish).  If I "telnet localhost
>>>>816" a session is opened, and I am informed that ^] is the escape key,
>>>>but that's all it says, and I don't know how to further investigate
>>>>this.
>>>
>>>root# fuser -vn tcp 816
>>
>>Thank you, that tells me that the user process is "rpc.statd", which I
>>assume is supposed to be there and nothing to worry about.  Thanks also
>>to Vince, who suggested the same thing.
>
>Actually you should firewall it imho. Same for all rpc* ports. Do not 
>connect to the internet with that port open. It belongs to nfs/nfsd and 
>portmap. So stop and disable that service if not using it.

The machine is behind a firewall, which is why I wasn't too worried, but
thank you.  I am not using NFS, so the culprit is portmap.  What does
portmap do that I need?  Why is it installed by default?
-- 

yours,

William

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