I have a fairly simple firewall configuration for a VoIP server.
The last rule is the DENY rule, and it's set to log.
I've turned off OS based spoof protection in case - but still can't work out what is going on.
VoIP calls are all failing - because asterisk and kamailio can't talk. But - no rejected packets appear in the log at all. When I disable the firewall - everything works again - but obviously - less then an ideal situation.