Been searching the forum and Googling for an answer but found none
  yet.  I need to get m0n0wall v1.0 to permit voice chat thru windows messenger
  4.7 or 5.0.  I set up some NAT and fw rules to allow certain ports:
        UDP     *       *       192.168.1.6     2001 - 2120     NAT IM file transfer
        TCP/UDP         *       *       192.168.1.6     6901    NAT IM Voice
        UDP     *       *       192.168.1.6     6801    NAT IM Voice
        TCP     *       *       192.168.1.6     6891 - 6895     NAT IM File Transfer
        UDP     *       *       192.168.1.6     5000    NAT IM UPnP
        TCP     *       *       192.168.1.6     3389    NAT IM
        TCP     *       *       192.168.1.6     1603    NAT IM
        
  Now, on my old Coyote Linux fw using iptables, this seemed to work
  on occaision. Figured FreeBSD and ipfilter is superior to iptables
  so it should be easier to accomplish.  Probably is but I need
  someone to point out the answer to me.  Please help.

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