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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Asterisk doesn&#8217;t use PING to check the STATUS, it uses a SIP
OPTION message.<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Regards,<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Marc<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <b>On Behalf Of </b>Olivier<br>
<b>Sent:</b> mardi 17 février 2009 14:06<br>
<b>To:</b> Asterisk Users Mailing List - Non-Commercial Discussion<br>
<b>Subject:</b> [asterisk-users] Pingable and Unreachable at the same time !<o:p></o:p></span></p>

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<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Hi,<br>
<br>
Has anyone met something like this ?<br>
<br>
dialor*CLI&gt; sip show peers<br>
Name/username&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Host&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Dyn Nat
ACL Port&nbsp;&nbsp;&nbsp;&nbsp; Status<br>
7541/7541&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(Unspecified)&nbsp;&nbsp;&nbsp;
D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UNKNOWN<br>
7540/7540&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(Unspecified)&nbsp;&nbsp;&nbsp;
D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UNKNOWN<br>
7534/7534&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(Unspecified)&nbsp;&nbsp;&nbsp;
D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UNKNOWN<br>
7533/7533&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(Unspecified)&nbsp;&nbsp;&nbsp;
D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; UNKNOWN<br>
7531/7531&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
192.168.100.199&nbsp; D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
5060&nbsp;&nbsp;&nbsp;&nbsp; OK (10 ms)<br>
7530/7530&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
192.168.100.196&nbsp; D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
5060&nbsp;&nbsp;&nbsp;&nbsp; UNREACHABLE<br>
patton/patton&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
192.168.100.52&nbsp;&nbsp;
D&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
5060&nbsp;&nbsp;&nbsp;&nbsp; OK (33 ms)<br>
trunk/trunk4ipbx&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
192.168.64.2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
5060&nbsp;&nbsp;&nbsp;&nbsp; OK (1 ms)<br>
8 sip peers [Monitored: 3 online, 5 offline Unmonitored: 0 online, 0 offline]<br>
dialor*CLI&gt; !ping 192.168.100.196<br>
PING 192.168.100.196 (192.168.100.196) 56(84) bytes of data.<br>
64 bytes from <a href="http://192.168.100.196">192.168.100.196</a>: icmp_seq=1
ttl=64 time=0.334 ms<br>
64 bytes from <a href="http://192.168.100.196">192.168.100.196</a>: icmp_seq=2
ttl=64 time=0.305 ms<br>
64 bytes from <a href="http://192.168.100.196">192.168.100.196</a>: icmp_seq=3
ttl=64 time=0.305 ms<br>
<br>
Any explaination ?<br>
<br>
Regards<o:p></o:p></p>

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