I have some custom programs that use tcp4444 and udp5061
The port suddenly becomes unavailable at the moment of firewall startup
Can freepbx firewalls open custom ports
Let me explain
I closed port 5060tcpudp
tcp 5061 is my sips port using fail2ban and freepbxfirewall, it is very important. There are many violent attacks from Russia IP…
udp5061 is other game port,this program has no vulnerabilities
The two programs are not connected
I think this firewall configuration haven’t security risk.
But the freepbx firewall is very special, and I’m not sure if it can distinguish between TCP and UDP on the same port.