I have BM3.8 on Netware 6.5 running proxy, have had no problems with access
to https sites with a standard 443 stateful filter so far.

Our accounts have started to use an online posting of data to a government
web site. Access via a web browser (https) is ok. When the accounts run the
posting program, the connection to the site fails. Unload the BM filters
(ipflt) and the posting works ok. The government department have not been
very forthcoming with information to help me find out the port usage for
this posting service.

Can anybody help? What is the best way to find out which port is being used?

Any info gratefully received.