Bind won't accept request on port 53 UDP protocol, on TCP is fine.
I enabled it on firewalld but it don't mater, because it same if firewalld is disable.
Bind listening on port 53 UDP on server. There isn't other services listening on port 53 UDP on server.
I can dig from server on port 53, UDP and TCP protocols both local and external IP.
I can dig from outside server on port 53, TCP protocol.
But I can't dig from outside server on port 53 UDP protocol.
result scan nmap form outside server port 53 UDP protocol:
Code: Select all
PORT STATE SERVICE 53/udp open|filtered domain