<html><body bgcolor="#FFFFFF"><div>True, but with all due respect, if the cache's TTL expires and the OP's PBX cannot reach an external DNS server, they have bigger problems ;-)</div><div><br></div><div>Slainte all!</div><div>The Mick<br><br>Sent from my iPhone</div><div><br>On May 30, 2011, at 9:41 PM, Mark Deneen <<a href="mailto:mdeneen@gmail.com">mdeneen@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><div class="gmail_quote">On Mon, May 30, 2011 at 2:44 AM, gincantalupo <span dir="ltr"><<a href="mailto:gincantalupo@fgasoftware.com"><a href="mailto:gincantalupo@fgasoftware.com">gincantalupo@fgasoftware.com</a></a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi,<br>
<br>
it is a known problem, one of the worst. To avoid it:<br>
<br>
- do not use urls, only ip addresses in sip.conf<br>
<br>
or put your urls inside /etc/hosts (is what I do especially sip providers urls)<br>
<br>
or install a dns-cache on your pbx (maybe the best solution)<br>
<br>
Giorgio<div><div></div><div class="h5"><br><br></div></div></blockquote><div><br></div><div>Even a dns cache won't help you forever. Once the entry's TTL expires, your cache won't be able to give you an answer until it can contact root servers on the internet.</div>
<div><br></div><div>-M</div></div>
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