Date: Tue, 31 Mar 1998 17:34:50 -0500 (EST) From: spork <spork@super-g.com> To: hackers@FreeBSD.ORG Subject: NFS over TCP Message-ID: <Pine.BSF.3.96.980331172734.6720A-100000@super-g.inch.com>
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Hi,
It's my understanding that NFS in -stable can be run with TCP as the
transport rather than UDP.
As an exercise in firewalling, I'm trying to make the entire nfs suite
work over TCP, as it seems easier to control than UDP. Looking at
rpcinfo, mountd, portmapper, and nfsd all listen on TCP ports, and
telnetting to these ports shows that there is indeed something there
listening:
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100005 3 udp 967 mountd
100005 3 tcp 1012 mountd
100005 1 udp 967 mountd
100005 1 tcp 1012 mountd
However, if I disallow UDP traffic between the nfs server and client, I
see a whole bunch of UDP packets denied by ipfw. I have started nfsd with
the "-t" flag on the server, and am specifying a version 3 tcp mount on
the client. Is it possible to actually disable udp in mountd and portmap?
I couldn't find a flag for this in the manpages...
Thanks for any info,
C
Charles Sprickman
spork@super-g.com
----
"I'm not a prophet or a stone-age man
Just a mortal with potential of a superman
I'm living on" -DB
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