Re: help with FC3 and Bugzilla Bug 161181 DNS truncation

From: Skunk Worx (skunkworx_at_verizon.net)
Date: 08/24/05

  • Next message: Ankush Grover: "Re: mount per user" 
    Date: Tue, 23 Aug 2005 21:15:33 -0700
To: For users of Fedora Core releases <fedora-list@redhat.com>

    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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