Hi,
I have a node.js based dns program on port 53 and have it working as localhost on debian 8.5 but I cannot seem to get it to work externally despite getting the firewall rules right having tested them with Bind9.
-A INPUT -p udp --dport 53 --sport 1024:65535 -j ACCEPT
-A OUTPUT -p udp --sport 53 --dport 1024:65535 -j ACCEPT
-A OUTPUT -p udp --sport 53 --dport 1024:65535 -j ACCEPT
-A INPUT -p udp --dport 53 --sport 1024:65535 -j ACCEPT
-A OUTPUT -p udp --sport 53 --dport 53 -j ACCEPT
-A INPUT -p udp --dport 53 --sport 53 -j ACCEPT
Also I have done :-
setcap cap_net_bind_service=+ep /usr/bin/nodejs
to allow node to work with ports less than 1024.
I have my node dns program working on port 53 UDP with dig from localhost but Basically not externally on the local network and cannot work out why ?
I have mainly been using :-
for testing.
Its probably something obvious hope someone can help !
--
Aaron Gray
Independent Open Source Software Engineer, Computer Language Researcher, Information Theorist, and amateur computer scientist.