[gentoo-user] OT - Finding the port NFS runs on

[gentoo-user] OT - Finding the port NFS runs on

[Michael Sullivan]

How can I find out what port NFS is running on so I can let it through
my subrouter?

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Re: [gentoo-user] OT - Finding the port NFS runs on

[Chris Brennan]

install nmap and port map yourself ... or netstat -a | grep nfs(d) ....

Michael Sullivan wrote:
> How can I find out what port NFS is running on so I can let it through
> my subrouter?
> 
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Re: [gentoo-user] OT - Finding the port NFS runs on

[Alan McKinnon]

On Friday 14 March 2008, Michael Sullivan wrote:
> How can I find out what port NFS is running on so I can let it
> through my subrouter?

It tends to vary somewhat. portmapper is quite loose and fancy free with 
port numbers, you will often find 2049 in use and others around 900 or 
so. nmap is your friend here, as well as netstat and tcpdump in extreme 
cases

If this becomes a problem, most nfs tools support a -p option where you 
define which one you want.

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Alan McKinnon
alan dot mckinnon at gmail dot com

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Re: [gentoo-user] OT - Finding the port NFS runs on

[Etaoin Shrdlu]

On Friday 14 March 2008, Michael Sullivan wrote:

> How can I find out what port NFS is running on so I can let it through
> my subrouter?

rpcinfo -p <hostname> should tell you. Note that you might need to open 
other ports in addition to those used by nfs itself. In particular, the 
statd, lockd and mountd daemons usually use random ports, and I don't 
know whether and how they can be instructed to use fixed port numbers in 
Gentoo. Refer to this document for more information:

http://www.lowth.com/LinWiz/nfs_help.html
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Re: [gentoo-user] OT - Finding the port NFS runs on

[Dave Jones]

Etaoin Shrdlu wrote on 14/03/08 09:38:
> On Friday 14 March 2008, Michael Sullivan wrote:
>> How can I find out what port NFS is running on so I can let it through
>> my subrouter?

> rpcinfo -p <hostname> should tell you. Note that you might need to open 
> other ports in addition to those used by nfs itself. In particular, the 
> statd, lockd and mountd daemons usually use random ports, and I don't 
> know whether and how they can be instructed to use fixed port numbers in 
> Gentoo. Refer to this document for more information:

> http://www.lowth.com/LinWiz/nfs_help.html

Modify /etc/conf.d/nfs to setup the ports you want to use:

OPTS_RPC_MOUNTD="-p nnnnn"
OPTS_RPC_STATD="-p mmmmm -o pppppp"

Modify /etc/sysctl.conf to set up the lockd port:

fs.nfs.nlm_udpport = xxxxxx
fs.nfs.nlm_tcpport = xxxxxx

NFS uses port 2049 as standard, portmap uses port 111

Cheers, Dave


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