I am encountering this strange problem. Following is the sequence of events:
1. SDSL modem hang
2. Modem restarted
3. connection from external possible
4. packet filter refuse connection after a few minutes of normal activity

If I unload ipflt, connections can be made without problem. I have tried
making changes under filtcfg but it didn't solve the problem.
Server has to be rebooted to resolve it.

We are having NW5.0+SP6a with BM3.5+SP3 utilizing:
- packet filter
- applications rules
- proxy