StokeBloke.com

OpenDNS failure?

Well I spent a few hours yesterday trying to figure out why DNS was failing in some cases.

We use OpenDNS server then fallback to googles.

E.g.
208.67.222.222
208.67.220.220
8.8.8.8

Yesterday nslookup test.uribl.com.multi.uribl.com failed.

After a while I found the following …

OpenDNS server returns server unknown :
nslookup test.uribl.com.multi.uribl.com 208.67.220.220
Server: 208.67.220.220
Address: 208.67.220.220#53

** server can't find test.uribl.com.multi.uribl.com: NXDOMAIN

While google works correctly :
nslookup test.uribl.com.multi.uribl.com 8.8.8.8
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: test.uribl.com.multi.uribl.com
Address: 127.0.0.14

I have now switched to use google DNS only. I have no idea why OpenDNS fails for this lookup but not any other.

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