NFS UDP is blocked

FW version:

I have installed a NFS server (hanewin nfs) on Windows XP SP2.

I can connect to it from Linux when using TCP but not with UDP. The firewall is setup correctly, all rules are for TCP and UDP.

When I set Comodo FW to disabled the UDP connection still does not work, however if I UNINSTALL Comodo the connection will work!


  • install hanewin (trial): Netzwerksoftware für Windows
  • modify the exports: c:\ -public -readonly
  • connect from linux OK: mount -t nfs -o tcp :/c /mnt/test
  • connect from linux fails: mount -t nfs -o udp :/c /mnt/test
  • disable FW
  • connect from linux still fails: mount -t nfs -o udp :/c /mnt/test
  • uninstall FW
  • connect from linux WORKS!: mount -t nfs -o udp :/c /mnt/test

I need to use UDP because my media player does not support NFS via TCP.

Does anyone know of a workaround?

I have the same problem.

I’m using a TViX mediaplayer along with the software NetShare.

NetShare set’s up NFS server and it’s not working dispite the correct settings in the firewall.

Could you verify that the following is true for your setup as well:

  • NFS is still blocked even when disabling the firewall
  • NFS works after the firewall is uninstalled (don’t forget to export your settings first)

I have filed a support ticket but so far they don’t appear to take me seriously. Maybe you can try your luck as well?

The only workaround I’ve found so far is to use another firewall - works perfectly with “Online Armor Personal Firewall (Free edition)”.

Yes on both.

Great news, just got this reply:

We have forwarded your issue to our developers. Our developers are working on it. We will get back to you shortly.

Hopefully they’ll be able to fix the issue soon!