<div dir="ltr">I don't know with this version but certainly the SIP stack in earlier version would get blocked when it couldn't do a name resolution and cause symptoms exactly as you describe. It shouldn't happen but there you go.</div>
<div class="gmail_extra"><br><br><div class="gmail_quote">On 21 April 2013 12:24, Dereck D <span dir="ltr"><<a href="mailto:dereck.s@gmail.com" target="_blank">dereck.s@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
thank you , but how would it be DNS issue while other users drop<br>
unreachable too?<br>
all operators and SIP Peers go unreachable .. not only unable to register.<br>
oe peer using FQDN the rest are IP addresses.<br>
<div class="HOEnZb"><div class="h5"><br>
On Sun, Apr 21, 2013 at 2:18 PM, dotnetdub <<a href="mailto:dotnetdub@gmail.com">dotnetdub@gmail.com</a>> wrote:<br>
> Looks like a DNS issue.<br>
><br>
><br>
> On 21 April 2013 11:05, Dereck D <<a href="mailto:dereck.s@gmail.com">dereck.s@gmail.com</a>> wrote:<br>
>><br>
>> Hello List.<br>
>> Last month i started to face a strange issue on an asterisk server<br>
>> 1.8.9.3 built on Centos 5.3 x86_64 dedicated server.<br>
>> out of the blue UDP stops responding .. and keep getting the following<br>
>> output:<br>
>><br>
>> ---------------------------------- Opening message for the problem<br>
>> --------------------------------------------------<br>
>> [Mar 21 09:57:04] ERROR[6748] netsock2.c:<br>
>> getaddrinfo("<a href="http://pbx2.server.com" target="_blank">pbx2.server.com</a>", "(null)", ...): Temporary failure in<br>
>> name resolution<br>
>> [Mar 21 09:57:04] WARNING[6748] acl.c: Unable to lookup '<a href="http://pbx2.server.com" target="_blank">pbx2.server.com</a>'<br>
>> ----------------------------------------------------------------THEN<br>
>> -------------------------------------------------------------<br>
>> [Mar 21 09:57:04] NOTICE[6748] chan_sip.c: Peer 'YYYY' is now<br>
>> UNREACHABLE! Last qualify: 10<br>
>> [Mar 21 09:57:04] NOTICE[6748] chan_sip.c: Peer 'C1045' is now<br>
>> UNREACHABLE! Last qualify: 140<br>
>> [Mar 21 09:57:04] NOTICE[6748] chan_sip.c: Peer 'XXXX' is now<br>
>> UNREACHABLE! Last qualify: 33<br>
>> [Mar 21 09:57:15] NOTICE[6748] chan_sip.c: -- Registration for<br>
>> '<a href="mailto:8885008@pbx2.server.com">8885008@pbx2.server.com</a>' timed out, trying again (Attempt #3)<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C3000' is now<br>
>> UNREACHABLE! Last qualify: 87<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C5005' is now<br>
>> UNREACHABLE! Last qualify: 241<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1071' is now<br>
>> UNREACHABLE! Last qualify: 117<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1070' is now<br>
>> UNREACHABLE! Last qualify: 115<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1077' is now<br>
>> UNREACHABLE! Last qualify: 101<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1073' is now<br>
>> UNREACHABLE! Last qualify: 96<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1047' is now<br>
>> UNREACHABLE! Last qualify: 132<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1072' is now<br>
>> UNREACHABLE! Last qualify: 138<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1042' is now<br>
>> UNREACHABLE! Last qualify: 158<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C5006' is now<br>
>> UNREACHABLE! Last qualify: 267<br>
>> [Mar 21 09:57:21] NOTICE[6748] chan_sip.c: Peer 'C1053' is now<br>
>> UNREACHABLE! Last qualify: 136<br>
>> [Mar 21 09:57:41] NOTICE[6748] chan_sip.c: -- Registration for<br>
>> '<a href="mailto:8885005@pbx2.server.com">8885005@pbx2.server.com</a>' timed out, trying again (Attempt #3)<br>
>> [Mar 21 09:57:41] NOTICE[6748] chan_sip.c: Peer 'ipkall1' is now<br>
>> UNREACHABLE! Last qualify: 168<br>
>> [Mar 21 09:57:41] NOTICE[6748] chan_sip.c: Peer 'C1078' is now<br>
>> UNREACHABLE! Last qualify: 141<br>
>> [Mar 21 09:57:41] NOTICE[6748] chan_sip.c: Peer 'C1051' is now<br>
>> UNREACHABLE! Last qualify: 139<br>
>> [Mar 21 09:57:41] NOTICE[6748] chan_sip.c: Peer 'C1046' is now<br>
>> UNREACHABLE! Last qualify: 157<br>
>> [Mar 21 09:57:41] NOTICE[6748] chan_sip.c: Peer 'C1076' is now<br>
>> UNREACHABLE! Last qualify: 116<br>
>><br>
>><br>
>> this problem kept repeating randomly two or three times a day causing<br>
>> me losses. and then i migrated to another Centos 6x x86_64 dedicated<br>
>> server same asterisk version.<br>
>> everything returns to normal if i reboot the server. for a moment i<br>
>> thought i wasn't even able to nslookup but i could wget or yum or do<br>
>> other stuff..although i have my iptables disabled for a the last week<br>
>> for testing purposes.<br>
>> what i did today after the problem is:<br>
>> bindaddress: set to server IPv4 address instead of defaulting.<br>
>> disabled IPv6 from the server.<br>
>><br>
>><br>
>> any suggestions to what is causing this issue?<br>
>><br>
>> --<br>
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><br>
><br>
><br>
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</div></div></blockquote></div><br></div>