Hello, If I try to resolve oss.trac.sara.nl from work (aarnet), it works. If I try to resolve it from home (internode) it doesn't work. WTF? brian@webby:~$ host -C sara.nl. Nameserver nsauth1.sara.nl: sara.nl has SOA record nsauth1.sara.nl. nic.sara.nl. 2012122001 14400 7200 604800 86400 Nameserver nsauth2.sara.nl: sara.nl has SOA record nsauth1.sara.nl. nic.sara.nl. 2012122001 14400 7200 604800 86400 Nameserver ns2.surfnet.nl: sara.nl has SOA record nsauth1.sara.nl. nic.sara.nl. 2012122001 14400 7200 604800 86400 Maybe this is the reason? brian@webby:~$ host -r -a oss.trac.sara.nl ns2.surfnet.nl Trying "oss.trac.sara.nl" Received 82 bytes from 2001:610:3:200a:192:87:36:2#53 in 332 ms Trying "oss.trac.sara.nl.pri" Using domain server: Name: ns2.surfnet.nl Address: 2001:610:3:200a:192:87:36:2#53 Aliases: Host oss.trac.sara.nl.pri not found: 5(REFUSED) Received 38 bytes from 2001:610:3:200a:192:87:36:2#53 in 334 ms (the other two DNS servers are fine) Thanks -- Brian May <brian@microcomaustralia.com.au>
Brian May <brian@microcomaustralia.com.au> wrote:
If I try to resolve oss.trac.sara.nl from work (aarnet), it works. If I try to resolve it from home (internode) it doesn't work.
WTF?
Perhaps either the address or the NXDOMAIN response is cached on one of the name servers. I'm with Internode, but I run my own recursive name server (Bind 9). I can look the address up here. jason@jdc:~$ host oss.trac.sara.nl oss.trac.sara.nl is an alias for xtrac.osd.sara.nl. xtrac.osd.sara.nl has address 145.100.12.233 jason@jdc:~$
Brian May wrote:
Hello,
If I try to resolve oss.trac.sara.nl from work (aarnet), it works. If I try to resolve it from home (internode) it doesn't work.
OK, step #1 is use dig, not host. $ dig oss.trac.sara.nl +short $ ...doesn't resolve for me behind internode, so great, I can reproduce the issue. Let's see if the problem is internode, or upstream: $ dig oss.trac.sara.nl +short @8.8.8.8 xtrac.osd.sara.nl. 145.100.12.233 Google's happy, at least. What about the original nameservers? $ dig NS oss.trace.sara.nl sara.nl. 3600 IN SOA nsauth1.sara.nl. nic.sara.nl. 2012122001 14400 7200 604800 86400 $ dig NS trace.sara.nl +short $ dig NS sara.nl +short nsauth2.sara.nl. ns2.surfnet.nl. nsauth1.sara.nl. $ for i in nic.sara.nl nsauth{1,2}.sara.nl ns2.surfnet.nl do echo == $i == dig +short oss.trace.sara.nl @$i done == nic.sara.nl == dig: couldn't get address for 'nic.sara.nl': not found == nsauth1.sara.nl == == nsauth2.sara.nl == == ns2.surfnet.nl == Hm, not very helpful. And I'm bored now, so you're on your own. (Hint: remove +short and read the details, I only added it here to keep the email terse.)
participants (3)
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Brian May -
Jason White -
Trent W. Buck