suspicious named-udp-port?
hi list, today i found an open unprivileged udp-port on my server listening on 0.0.0.0 which i detected to be related to my named-server 8.2.3-REL (update done...;-) if i shut down the named and restart it another (possibly random) high udp-port is used in addition to the privileged udp-port 53 listening on my "real" interfaces. is this something to worry about?! a nervous list-reader...;-) daniel -- Machen Sie Ihr Hobby zu Geld bei unserem Partner 1&1! http://profiseller.de/info/index.php3?ac=OM.PS.PS003K00596T0409a -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net
today i found an open unprivileged udp-port on my server listening on 0.0.0.0 which i detected to be related to my named-server 8.2.3-REL (update done...;-)
if i shut down the named and restart it another (possibly random) high udp-port is used in addition to the privileged udp-port 53 listening on my "real" interfaces.
is this something to worry about?!
No, your name server sends requests as a client to other name servers, using both UDP and TCP/IP (zone transfers etc). There's an option in Bind 8 to use privilged DNS port 53 if it bothers you, that the client part of your name server, is originating requests from another port. Look for a comment about, an option that may be need with firewalls, in the named.conf. Regards Rob
participants (2)
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Daniel Quappe
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Robert Davies