I've had a short period of time recently to learn and implement DNS cache-only in our organisation. Trouble is, according to my tcpdumps, the amount of traffic on port 53 has increased. This is of course the exact opposit of the desired effect. Would y'all mind looking over my config?
FYI, the machine is an Exim MTA handling mail traffic. There are 2 internal and 2 external DNS servers as well as this machine. resolv.conf is pointed to local. Stuff I dig appears in the cache dump. I'm not sure if I should have the zone specified as there is no zonefile on this machine, but it did seem to get the internal traffic going again.
Since no one has given a shot at your question, I will sidestep the question and answer with: get DJB's dnscache program. It's part of his larger DNS server toolset; we use another DNS product completely for external DNS handling, and dnscache for forwarding internal requests. This is more secure, faster, and simpler to configure. You would have BIND "listen" on the external IP, and dnscache listen on the internal IP; this way they can co-exist on the same router.
Hi
Please can you help on this: the Net Admins decided to use DNS to resolve names, so this is preventing mail being delivered when using commands like date | mailx -s "test" abc.xyz@asdf.xx.yy.
What we were asked was to edit /etc/resolv.confand add 3 entries, in all servers (10 Replies)
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Hi again guys,
It seems this is a global thing affecting all the DNS bind versions prior to July 28 2008. I have my work cut out for me very soon, I see at least a handful of servers in my list that either need to patching or upgrading.
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Hello all,
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I cant open anyother site!!! :eek:
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