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<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font><span lang=EN-US>-----Original Message-----</span></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font><span lang=EN-US>From: Simon Kelley
[mailto:simon@thekelleys.org.uk]</span></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font><span lang=EN-US>Sent: quinta-feira, 1 de março de
2007 11:21</span></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font><span lang=EN-US>To: Edson</span></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font><span lang=EN-US>Cc: dnsmasq-discuss@lists.thekelleys.org.uk</span></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font><span lang=EN-US>Subject: Re: [Dnsmasq-discuss]
Problems with SRV Queries</span></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> Edson wrote:</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > Hi, All...</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> ></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > I'm facing some really wierd situation here...</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > I have a Grandstream that depends on a SRV querie to resolve
the SIP</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> server</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > address. When I define a SRV clause in the DNSMasq config
file, and</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > configure the Grandstream to use it as DNS server, it works
smoothly,</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> the</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > registration is successful. But if I don't, I see the querie
being</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> forwarded</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > to the DNS upstream server, but the answer never hits the
Grandestream.</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> Small gotcha here: if you are relying on --log-queries for this
data,</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> then you won't see the reply logged, only replies to A and AAAA
queries</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> get logged.</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>I'm getting such logs:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Mar 1 12:53:27 repolho dnsmasq[25013]: query[SRV]
_sip._udp.alta.com.br from 192.168.100.26<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Mar 1 12:53:27 repolho dnsmasq[25013]: config _sip._udp.alta.com.br is
<NODATA><o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > And</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > if I configure the Grandstream to use DNS upstream server
directly (the</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> same</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> > that DNSMasq points to) it works.</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> ></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> </span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> This should work: dnsmasq will forward queries of any type:</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> Can you use tcpdump/ethereal/wireshark to get some packet dumps.</span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Yeap.... the packets that appear on the EXTERNAL
interface (PPPoE) and the packets that appear on the INTERNAL interface (where the
Grandstream is attached), are:<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>On the INTERNAL:<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>13:00:54.096729 IP 192.168.100.26.26789 >
192.168.100.1.domain: 11213+ SRV? _sip._udp.alta.com.br. (39)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>13:00:54.098221 IP 192.168.100.1.domain >
192.168.100.26.26789: 11213* 0/0/0 (39)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>13:00:56.596491 IP 192.168.100.26.26789 >
192.168.100.1.domain: 11214+ A? alta.com.br. (29)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>13:00:56.761629 IP 192.168.100.1.domain >
192.168.100.26.26789: 11214 0/1/0 (94)<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>On the EXTERNAL:<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
style='font-size:8.0pt'>13:00:56.599380 IP 201.25.215.89.1053 >
201.10.120.3.53: 48957+ A? alta.com.br. (29)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
style='font-size:8.0pt'>13:00:56.599966 IP 201.25.215.89.1053 >
201.10.1.2.53: 48957+ A? alta.com.br. (29)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>13:00:56.760071 IP 201.10.120.3.53 >
201.25.215.89.1053: 48957 0/1/0 (94)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>13:00:56.789314 IP 201.10.1.2.53 >
201.25.215.89.1053: 48957 0/1/0 (94)<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=2 face="Courier New"><span
lang=EN-US style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>As You can see, the querie is present on the INTERNAL,
but not on the EXTERNAL.<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>For simplicity I reduce the DNSmasq configuration to:<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>log-queries<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>bogus-priv<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>filterwin2k<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>listen-address=127.0.0.1<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>listen-address=172.27.248.1<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>listen-address=192.168.100.1<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>resolv-file=/etc/ppp/resolv.conf<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>user=dnsmasq<o:p></o:p></span></font></p>
<p class=MsoPlainText style='margin-left:35.4pt'><font size=1 face="Courier New"><span
lang=EN-US style='font-size:8.0pt'>group=dialout<o:p></o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoPlainText><font size=2 face="Courier New"><span lang=EN-US
style='font-size:10.0pt'>Edson.<o:p></o:p></span></font></p>
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