Manish Kathuria wrote:
The idea is to switch between multiple internet links for the same internal network, without making frequent changes to /etc/resolv.conf. The ISPs here don't allow DNS look ups from an IP not belong to their address, so a number of look up requests get denied when the outgoing connection is through another ISP. Of course, I can run a caching nameserver on the small network or use Open DNS servers but that adds to the delay.
not half as bad as having every lookup try and go to the first server in /etc/resolv.conf, then fail, and try the 2nd, repeating until one resolves.
sounds like you should be running a caching name server, maybe even something thats aware of your ISP multiplexing scheme so it can dynmically choose forwarders
a local caching name server shouldn't add any significant delay, and will greatly speed up frequent lookups.
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