question about dns

crash88 · 06-23-2006, 10:21 AM

I changed the ip to one host on my lan and it won't resolve. I restarted bind thinking it would automatically start resolving for the machine I changed the ip address on. Does this have something to do with the value in refresh in one of the files? If that's the case, I'm assuming there's a cache somewhere. If so, how could I change it right away without waiting? Thanks in advance.

acid_kewpie · 06-23-2006, 10:58 AM

restarting BIND does flush the cache out, so that's not your problem. what your problem seems to be is that you just change an IP address on a box without reflecting the change in BIND's zone files. how is BIND supposed to know your address has changed? you coul dbe doin gthis with automated updates via DHCP, but i'd assume this is not the case from the way you have asked the question.

crash88 · 06-23-2006, 12:27 PM

sorry I wasn' tclear. I did change the ip address in bind. it just won't resolve properly when I try to ping the host. The problem is something like this:
dig earth.antilogy.net: this resolves to the correct address.
ping earth.antilogy.net: this resolves to 192.168.1.4 (should be *.*.*.3

acid_kewpie · 06-23-2006, 02:19 PM

that would suggest a local cache issue. by definition a BIND server isn't going to cache a name that it holds a zone file for. what happens if you do a full zone transfer on your domain - "dig antilogy.net axfr @bindipaddresshere" that'll dump the authoritative zone file right on your lap if BIND allows it.

crash88 · 06-23-2006, 02:53 PM

everything I do through dns (host earth, dig earth, etc) will turn up correctly. the zone transfer showed everything correctly, but a simple ping will show the last octet as .4 instead of .3. My dns server is also a bridge so the interface's name is "venus". I can't get the machine "earth" to resolve either so my windows box is useless for any kind of internet usage. I've looked through every zone file and they all show earth as 192.168.1.3. Dunno what the deal is. Thanks for your help though.

scowles · 06-23-2006, 03:22 PM

Does your /etc/hosts file possibly contain the original .3 entry? Ping will use your systems resolver lib configuration (usually hosts/bind), while dig only uses bind.

As for your winders box...

1) check that its DNS config is pointing to the correct address
2) type: "ipconfig /flushdns" in a command prompt
3) try disabling the "DNS client" service

crash88 · 06-24-2006, 02:32 PM

I'm not at home right now, but come to think of it I think I do have the hosts file with that windows box set with the ip address that's causing the problem. Thanks a bunch.