At 11:26 AM 5/7/2009, Frank Steiner wrote: >Leonardo Chiquitto wrote > >>> Is there a way to prevent those UDP connects? >> >> Yes, add "mountproto=tcp" to your mount options. > >I was only aware of "proto=tcp" and indeed missed the mountproto option. > >Thanks both Leonardo and Trond for your answers! > There is one small caveat to using mountproto=tcp through firewalls: while the mount will succeed, there are some side protocol exchanges which may not. In particular, if you do NLM file locking, there is a server callback (NLM "granted") which the server may choose to issue via UDP. If this callback is not seen by the client due to firewall blocking, there may be a 30-second pause before a client retry unblocks the caller. Also, the NSM (status monitor) exchanges are often performed via UDP. Again, if you are using NLM and the server reboots, the client may not become aware of this promptly, and lock reclaim will be affected. OTOH, if your applications don't use locking on the NFS mounts, you'll probably be fine. Tom. ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ NFS maillist - NFS@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/nfs _______________________________________________ Please note that nfs@xxxxxxxxxxxxxxxxxxxxx is being discontinued. Please subscribe to linux-nfs@xxxxxxxxxxxxxxx instead. http://vger.kernel.org/vger-lists.html#linux-nfs -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
