help with FC3 and Bugzilla Bug 161181 DNS truncation
Skunk Worx
skunkworx at verizon.net
Wed Aug 24 04:15:33 UTC 2005
Paul Howarth wrote:
> On Mon, 2005-08-22 at 12:58 -0700, Skunk Worx wrote:
>
>>Paul Howarth wrote:
>>
>>>On Sun, 2005-08-21 at 16:54 -0700, Skunk Worx wrote:
>>>
>>>
>>>>My FC3 local caching DNS is placing the AUTHORITY section in the
>>>>responses. I think this exceeds a certain size threshold and I get this :
>>>>
>>>># dig @10.0.0.2 www.wikipedia.org
>>>>;; Truncated, retrying in TCP mode.
>>>>
>>>>When I go directly to my ISP's dns, it is fine, I assume because there
>>>>is no lengthy AUTHORITY section in their reply.
>>>
>>>
>>>What lengthy AUTHORITY section? I'm getting just this:
>>>
>>>;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 3, ADDITIONAL: 3
>>>
>>
>>So far I always get back AUTHORITY: 13 from my local caching DNS with
>>lines in the form of :
>>
>>. 28240 IN NS A.ROOT-SERVERS.NET.
>>
>>If I make an empty root.hints file I get SERVFAIL. If I try trimming
>>down the root.hints file, or removing it, I get all 13 entries back.
>>
>>Dig'ing directly to my ISPs DNS returns AUTHORITY: 0 (no list), so the
>>size of the response is not big enough to trigger the glibc bug.
>>
>>I've been fooling with the root.hints, zone and conf files and reviewing
>>the caching DNS howto's (via google) but so far it's all or nothing (13
>>AUTHORITY: entries or SERVFAIL).
>
>
> What's strange about this is that the AUTHORITY section should be
> returning the 3 wikipedia.org nameservers, not the root servers.
>
> What do you get for:
> $ dig www.wikipedia.org +trace
> $ rpm -q bind
>
Thanks again for your continuing help. I must have some configuration
setting botched to be getting all those root server entries.
--
SW
$ dig www.wikipedia.org +trace
; <<>> DiG 9.2.5 <<>> www.wikipedia.org +trace
;; global options: printcmd
. 38309 IN NS D.ROOT-SERVERS.NET.
. 38309 IN NS E.ROOT-SERVERS.NET.
. 38309 IN NS F.ROOT-SERVERS.NET.
. 38309 IN NS G.ROOT-SERVERS.NET.
. 38309 IN NS H.ROOT-SERVERS.NET.
. 38309 IN NS I.ROOT-SERVERS.NET.
. 38309 IN NS J.ROOT-SERVERS.NET.
. 38309 IN NS K.ROOT-SERVERS.NET.
. 38309 IN NS L.ROOT-SERVERS.NET.
. 38309 IN NS M.ROOT-SERVERS.NET.
. 38309 IN NS A.ROOT-SERVERS.NET.
. 38309 IN NS B.ROOT-SERVERS.NET.
. 38309 IN NS C.ROOT-SERVERS.NET.
;; Received 260 bytes from 10.0.0.2#53(10.0.0.2) in 3 ms
org. 172800 IN NS TLD1.ULTRADNS.NET.
org. 172800 IN NS TLD2.ULTRADNS.NET.
org. 172800 IN NS TLD3.ULTRADNS.org.
org. 172800 IN NS TLD4.ULTRADNS.org.
org. 172800 IN NS TLD5.ULTRADNS.INFO.
org. 172800 IN NS TLD6.ULTRADNS.CO.UK.
;; Received 293 bytes from 128.8.10.90#53(D.ROOT-SERVERS.NET) in 103 ms
wikipedia.org. 86400 IN NS ns2.wikimedia.org.
wikipedia.org. 86400 IN NS ns1.wikimedia.org.
wikipedia.org. 86400 IN NS ns0.wikimedia.org.
;; Received 147 bytes from 204.74.112.1#53(TLD1.ULTRADNS.NET) in 20 ms
www.wikipedia.org. 3600 IN CNAME rr.wikimedia.org.
rr.wikimedia.org. 600 IN CNAME rr.pmtpa.wikimedia.org.
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.248
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.204
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.210
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.246
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.235
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.213
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.245
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.203
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.206
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.214
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.247
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.236
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.202
rr.pmtpa.wikimedia.org. 3600 IN A 207.142.131.205
;; Received 309 bytes from 145.97.39.158#53(ns2.wikimedia.org) in 168 ms
$ rpm -q bind
bind-9.2.5-3
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