Recently we hade a security audit. One possible security issue was found
and explained as follow:

It is possible to by-pass the rules of the remote firewall by sending UDP
packets with a source port equal to 53.

Unfortunately I cannot find any information about this. Is there something
I can do against this possible security issue?

Im running BorderManager 3.7 with the sp3 and fp4c patches on a NetWare
5.1sp6 server.