Hi ! Seems like that is an old google dns issue, look at http://9fans.net/archive/2008/10/37
On Tue, Nov 23, 2010 at 12:48 PM, Pavel Klinkovsky <pavel.klinkov...@gmail.com> wrote: > > Hi all, > > I am using Plan9 server as my home server (ip=192.168.15.20) > controlling DNS names in my LAN and relaying other requests to the > public DNS server (ip=88.146.135.10). > Up to now everything worked fine. > > > I discovered a problem with SRV request type from my Linux workstation > (ip=192.168.15.207): > > $ nslookup -type=srv _xmpp-server._tcp.google.com > ;; Warning: Message parser reports malformed message packet. > Server: 192.168.15.20 > Address: 192.168.15.20#53 > > *** Can't find _xmpp-server._tcp.google.com: No answer > > > I monitored DNS traffic on my server using 'snoopy': > > 091714 ms > ether(s=6cf0490d4ac0 d=00270e03ef27 pr=0800 ln=88) > ip(s=192.168.15.207 d=192.168.15.20 id=5a54 frag=0000 ttl= 64 pr=17 > ln=74) > udp(s=44912 d=53 ck=a748 ln= 54) > dns(id=49429 flags=0x100) > dns.qd(srv name=_xmpp-server._tcp.google.com ttl=0) > 091730 ms > ether(s=00270e03ef27 d=0013101df6b6 pr=0800 ln=88) > ip(s=192.168.15.20 d=88.146.135.10 id=f122 frag=0000 ttl=255 pr=17 > ln=74) > udp(s=40364 d=53 ck=6987 ln= 54) > dns(id=374 flags=0x100) > dns.qd(srv name=_xmpp-server._tcp.google.com ttl=0) > 091755 ms > ether(s=0013101df6b6 d=00270e03ef27 pr=0800 ln=458) > ip(s=88.146.135.10 d=192.168.15.20 id=ad4c frag=0000 ttl=126 pr=17 > ln=444) > udp(s=53 d=40364 ck=6873 ln= 424) > dns(id=374 flags=0x8500) > dns.qd(srv name=_xmpp-server._tcp.google.com ttl=0) > dns.an(srv name=_xmpp-server._tcp.google.com ttl=900) > dns.an(srv name=_xmpp-server._tcp.google.com ttl=900) > dns.an(srv name=_xmpp-server._tcp.google.com ttl=900) > dns.an(srv name=_xmpp-server._tcp.google.com ttl=900) > dns.an(srv name=_xmpp-server._tcp.google.com ttl=900) > dns.ar(ip name=xmpp-server1.l.google.com ttl=1800) > dns.ar(ip name=xmpp-server4.l.google.com ttl=1800) > dns.ar(ip name=xmpp-server.l.google.com ttl=300) > dns.ar(ip name=xmpp-server2.l.google.com ttl=1800) > dns.ar(ip name=xmpp-server3.l.google.com ttl=1800) > <after several seconds 'snoopy' inexplicably ends!> > > > You can see that: > - request is delivered from Linux to the server, > - relayed to the public server, > - answer is received from the public server, > - nothing is sent to the Linux. > > This is not fully true, I monitored the IP traffic on Linux using > 'wireshark'. > Linux received an answer, but as a malformed (cut) packet. > (Just note: This 'wireshark' dump does not match preciselly since the > the 'snoopy' dump was from different test. > But the behavior is always the same.) > > 0000 6c f0 49 0d 4a c0 00 27 0e 03 ef 27 08 00 45 00 > l.I.J..' ...'..E. > 0010 01 25 53 db 00 00 ff 11 c6 b8 c0 a8 0f 14 c0 a8 . > %S..... ........ > 0020 0f cf 00 35 cd c2 01 11 8f a0 53 4e 84 80 00 01 ... > 5.... ..SN.... > 0030 00 05 00 00 00 00 0c 5f 78 6d 70 70 2d 73 65 72 ......._ xmpp- > ser > 0040 76 65 72 04 5f 74 63 70 06 67 6f 6f 67 6c 65 03 > ver._tcp .google. > 0050 63 6f 6d 00 00 21 00 01 c0 0c 00 21 00 01 00 00 > com..!.. ...!.... > 0060 01 0a 00 20 00 14 00 00 14 95 19 78 6d 70 70 > 2d ... .... ...xmpp- > 0070 73 65 72 76 65 72 32 2e 6c 2e 67 6f 6f 67 6c 65 server2. > l.google > 0080 2e 63 6f 6d c0 0c 00 21 00 01 00 00 01 0a 00 > 20 .com...! ....... > 0090 00 14 00 00 14 95 19 78 6d 70 70 2d 73 65 72 76 .......x mpp- > serv > 00a0 65 72 33 2e 6c 2e 67 6f 6f 67 6c 65 2e 63 6f 6d er3.l.go > ogle.com > 00b0 c0 0c 00 21 00 01 00 00 01 0a 00 20 00 14 00 > 00 ...!.... ... .... > 00c0 14 95 19 78 6d 70 70 2d 73 65 72 76 65 72 34 2e ...xmpp- > server4. > 00d0 6c 2e 67 6f 6f 67 6c 65 2e 63 6f 6d c0 0c 00 21 > l.google .com...! > 00e0 00 01 00 00 01 0a 00 20 00 14 00 00 14 95 19 > 78 ....... .......x > 00f0 6d 70 70 2d 73 65 72 76 65 72 31 2e 6c 2e 67 6f mpp-serv > er1.l.go > 0100 6f 67 6c 65 2e 63 6f 6d c0 0c 00 21 00 01 00 00 > ogle.com ...!.... > 0110 01 0a 00 1f 00 05 00 00 14 95 18 78 6d 70 70 > 2d ........ ...xmpp- > 0120 73 65 72 76 65 72 2e 6c 2e 67 6f 6f 67 6c 65 2e > server.l .google. > 0130 63 6f 6d > com > > > It seems to me the DNS in Plan9 has a problem... ;-) > > Can anyone help me? > > Thanks in advance. > > Pavel > > -- С наилучшими пожеланиями Жилкин Сергей With best regards Zhilkin Sergey
