On Tue, 8 Jan 2002, Werner Puschitz wrote:

> 
> On Mon, 7 Jan 2002, Monte Milanuk wrote:
> 
> > I need to know what ports to leave open so I can firewall my server, but
> > still allow access for NFS mounted /home directories.
> > 
> > I gather that I will probably have to leave open the tcp/udp ports 111 for
> > sunrpc and tcp/udp 2049 for NFS, but what else?  I've seen mention of
> > specifying a port for mountd in /etc/services in the ~600 range and
> > leaving it open too.
> > 
> > Anyone have some specific information on this to share?
> 
> I would just run a portscan on the NFS server and then identify all 
> listening ports that are related to NFS. 
> 
> nmap -sT <server>
> 

BTW, if you want to know which process is listening on a port, you can use 
losof:

# nmap -sT localhost
[snip]
663/tcp    open        unknown
683/tcp    open        unknown
6000/tcp   open        X11
32770/tcp  open        sometimes-rpc3

# lsof -i :32770
COMMAND    PID USER   FD   TYPE DEVICE SIZE NODE NAME
rpc.mount 1150 root    4u  IPv4   1796       TCP *:32770 (LISTEN)
#

Werner




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