[NFS] nfs-over-tcp still needs udp ports? (SLES 11)

[Frank Steiner <fsteiner-mail1-G0GEQqhI7DhYiKXMg8wJIg@public.gmane.org>]

Hi,

I'm fighting with my firewall to get nfs-over-tcp through. 

The server is outside the firewall, the client is inside. The firewall
allows all tcp back-connections (without syn), no UDPs. Mount on the
client side worked fine with kernel 2.6.16 in SLES 10.

Now when the NFS client is running SLES 11 with its kernel 2.6.27, 
the NFS server tries to make UDP connections from its ports 111 and 
700 to different ports on the client.

If the client is running SLES 10 with 2.6.16, those connections are
not tried from the server, no matter if the server runs 2.6.16 or
2.6.27.

So I've two questions:
1) Should nfs-over-tcp still use any UDP ports at all?
2) What has been changed in the client code between 2.6.16 and 2.6.27
   that could cause this behaviour?

Is there a way to prevent those UDP connects?

cu,
Frank

-- 
Dipl.-Inform. Frank Steiner   Web:  http://www.bio.ifi.lmu.de/~steiner/
Lehrstuhl f. Bioinformatik    Mail: http://www.bio.ifi.lmu.de/~steiner/m/
LMU, Amalienstr. 17           Phone: +49 89 2180-4049
80333 Muenchen, Germany       Fax:   +49 89 2180-99-4049
* Rekursion kann man erst verstehen, wenn man Rekursion verstanden hat. *

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