Re: [debian-knoppix] why is port 111 open?
On Fri, Mar 05, 2004 at 04:49:59PM +0100, Robert Storey wrote:
> Maybe this is no big deal, but I'm wondering why port 111 is open by
> default...
>
> bob@sonic:~> netstat -an | more
> Active Internet connections (servers and established)
> Proto Recv-Q Send-Q Local Address Foreign Address State
> tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN
> tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
> tcp 0 0 0.0.0.0:631 0.0.0.0:* LISTEN
> udp 0 0 0.0.0.0:111 0.0.0.0:*
> udp 0 0 0.0.0.0:631 0.0.0.0:*
>
> I do understand that port 22 is for ssh, and port 631 is for cupsys -
> both of these I want to keep open.
Non of these is open on Knoppix, unless you start the corresponding
services manually.
> According to the information I've been able to find, port 111/tcp is
> sunrpc (SUN Remote Procedure Call). I haven't seen this particular port
> open on my other two currently installed OSs (Slackware and FreeBSD).
> There may be a valid reason for keeping it open, but if not, I'd like to
> close it. I'm actually not sure how to close port 111, so any advice on
> that would be appreciated.
Port 111 is open if you start portmap, which is used for NFS.
> Knoppix is actually pretty lean on the number of ports it opens by
> default - Slackware in particular seems to keep a lot of ports open. So
> I'm not complaining, but merely curious.
Knoppix only has open ports for services you start by yourself. No port
is open by default.
Regards
-Klaus Knopper
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