On Sun, 2011-01-02 at 08:45 +0000, Dick Holland wrote: > On Sun, 2011-01-02 at 00:33 -0800, Gordon Messmer wrote: > > On 01/01/2011 05:59 AM, Dick Holland wrote: > > > I've installed F14 on a box that was running F8 (I know, I know...) and > > > DNS is not working properly. > > ... > > > I've trawled the forums and mailing list archives and I've searched > > > Redhat bugzilla. I've seen references to 64-bit DNS problems in F10-F11, > > > but nothing still open that I can find. > > > > You might be running into this: > > https://bugzilla.redhat.com/show_bug.cgi?id=505505 > > > > As far as I can tell, DNS won't work unless your DNS server supports > > IPv6 (AAAA) queries. If this sounds like your problem, I'd appreciate > > the input. The glibc devs have been ignoring this. > > > > I'm not sure if dig can tell you what you need to know here. You could > > try "dig -t aaaa google.com" and see what you get. Otherwise, try to > > use "tcpdump -w /var/tmp/dns.dump -s0 port 53" to capture the DNS lookup > > that happens when you try to connect with telnet. Use Ctrl+C to stop > > capturing, and then send /var/tmp/dns.dump back to the list. > > Gordon, that bug report certainly looks promising, doesn't it? I'll try > those commands you suggest and post the results. I'm a bit suspicious, > though, as I have tried removing my local DNS server from the config and > using only my ISP's servers. I got exactly the same result (see my > response to Doc earlier in this thread); I guess if my ISP's DNS servers > don't support IPv6 then none of their customers can be using recent > Fedoras. > > I'll try the commands you suggested on both configs: with my DNS server > in; and with it out. > > > -- > Dick Holland OK, here are the results of making IPv6 type AAAA DNS requests. -------------------------------------------------------------------------- Sending "dig -t aaaa google.com" to my local DNS server: ; <<>> DiG 9.7.2-P2-RedHat-9.7.2-2.P2.fc14 <<>> -t aaaa google.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39018 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;google.com. IN AAAA ;; Query time: 5 msec ;; SERVER: 192.168.181.254#53(192.168.181.254) ;; WHEN: Sun Jan 2 08:56:13 2011 ;; MSG SIZE rcvd: 28 So the "no response" I guess means IPv6 is not supported by the server. -------------------------------------------------------------------------- Sending "dig -t aaaa google.com" to my ISP's DNS servers: ; <<>> DiG 9.7.2-P2-RedHat-9.7.2-2.P2.fc14 <<>> -t aaaa google.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39018 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;google.com. IN AAAA ;; Query time: 5 msec ;; SERVER: 194.168.4.100#53(194.168.4.100) ;; WHEN: Sun Jan 2 09:05:52 2011 ;; MSG SIZE rcvd: 28 No answer from the ISP either! So I guess that means they don't support IPv6 either. -------------------------------------------------------------------------- Just to be sure, here's resolv.conf for that last dig: # Generated by NetworkManager search xegetix.com nameserver 194.168.4.100 nameserver 194.168.8.100 -------------------------------------------------------------------------- So I'm sure my DNS server wasn't being queried. I've also been to my ISP's website and established that they don't support - and have no plans to support - IPv6. In fact there are A LOT of complaints on their support forums about this! The ISP is Virgin Media in the UK who are the largest - if not the only - cable broadband ISP in the UK. If there is no way of turning the IPv6 requests off, Virgin Media customers cannot use Fedora! Thank you, Gordon, you were absolutely spot on by the looks of it. All this leaves me with one question: is there a way of turning off these IPv6 DNS requests in Fedora? -- Dick Holland -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
