[linux] Force mountd to use UDP

Doug McLean dougmc at u.washington.edu
Wed Dec 1 21:40:49 PST 2004


Or maybe V4 (which is in the new Fedora) can do it? That's just a guess
though.

Doug McLean
CSS Systems Administrator
University of Washington, Bothell
http://staff.washington.edu/dougmc/pgp.html

Meanwhile, in Gotham, Cere M. Davis wrote:


>

> You might want to try just running nfs version 2 as one of you mountd

> flags (mountd -V 2). version 2 didn't even have tcp based services as I

> recall...

>

> On Wed, 1 Dec 2004, Michal wrote:

>

>> Date: Wed, 1 Dec 2004 17:54:22 -0800

>> From: Michal <michalg at gmail.com>

>> To: Linux/Unix Users Group at the UW <linux at u.washington.edu>

>> Subject: [linux] Force mountd to use UDP

>>

>> I posted this question to comp.protocol.nfs this morning, but things

>> are slow there.. so I'm hoping someone here can chime in with a clue.

>> Thanks!

>>

>> ---

>>

>> My goal is to configure a server to avoid exporting its files over

>> TCP. I want to force UDP.

>>

>> The server is Fedora Core 1, Linux kernel 2.4.22. On this server,

>> "/usr/sbin/rpcinfo -p | grep nfs" reports:

>>

>> 100003 2 udp 2049 nfs

>> 100003 3 udp 2049 nfs

>> 100003 2 tcp 2049 nfs

>> 100003 3 tcp 2049 nfs

>>

>> I modified the script /etc/init.d/nfs which starts NFS services such

>> that rpc.mountd is started with the "--no-tcp" argument. The

>> rpc.mountd documentation says this means "Don't advertise TCP for

>> mount." Yet, rpcinfo still reports NFS services for both UDP and TCP.

>> Mounting its exports on remote systems causes them to be mounted with

>> "proto=tcp".

>>

>> There is another NFS server with an older version of Linux (2.4.18)

>> running RedHat 7.3. Running "rpcinfo -p | grep nfs" on it reports:

>>

>> 100003 2 udp 2049 nfs

>> 100003 3 udp 2049 nfs

>>

>> Mounting its exports on remote systems causes them to be mounted with

>> "proto=udp".

>>

>> I don't know what else to try on the FC1 box to force it to stop

>> servicing NFS/TCP services.

>>

>> Can anyone help?

>>

>> -Michal

>>

>

> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

> Cere Davis

> Unix Systems Administrator - CSDE

> cere at u.washington.edu ph: 206.685.5346

> https://staff.washington.edu/cere

>

> GnuPG Key http://staff.washington.edu/cere/gpgkey.txt

> Key fingerprint = B63C 2361 3B9B 8599 ECC9 D061 3E48 A832 F455 9E7FA

>

>

>

>




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