Re: can't resolve some addresses

Hi!

On Mon, Apr 06, 2009 at 05:21:47AM +0300, Alex Efros wrote:
> Also there wireshark dump (tcpdump-compatible, AFAIK) using filter 'port 53'
> in file 'dns2.dump'.

Actually, for me reading tcp dumps are much ease than dnscache logs. :-/
According to wireshark, after dnscache get IPs for 3 NS for mozilla.org
it send to each of these 3 NS request:

    releases.mozilla.org: type A, class IN

and each NS send same reply:

    Flags: 0x8105 (Standard query response, Refused)
    Questions: 1
    Answer RRs: 0
    Authority RRs: 0
    Additional RRs: 0
    Queries
	releases.mozilla.org: type A, class IN

Interestingly, when I send same request using dnsq I got another reply:

    Flags: 0x8400 (Standard query response, No error)
    Questions: 1
    Answer RRs: 1
    Authority RRs: 0
    Additional RRs: 0
    Queries
	releases.mozilla.org: type A, class IN
    Answers
	releases.mozilla.org: type CNAME, class IN, cname releases.geo.mozilla.com

# dnsq a releases.mozilla.org 140.211.166.194
1 releases.mozilla.org:
76 bytes, 1+1+0+0 records, response, authoritative, noerror
query: 1 releases.mozilla.org
answer: releases.mozilla.org 60 CNAME releases.geo.mozilla.com


Actually, it turned out requests ain't really same, there difference in flags:
dnscache send flags 0x0100 (Recursion desired: Do query recursively)
while dnsq send flags 0x0000.


But, even with all this information, I still have no idea what's wrong and
how to fix it.

-- 
			WBR, Alex.