<div dir="ltr"><div>I resolved it when I read this: <a href="http://asterisk-support.ru/question/61578/asterisk-v13-unable-to-send-packet-address-family/">http://asterisk-support.ru/question/61578/asterisk-v13-unable-to-send-packet-address-family/</a> and then followed this <a href="https://community.rackspace.com/products/f/25/t/5110">https://community.rackspace.com/products/f/25/t/5110</a> to explicitly prefer IPv4 over IPv6.</div><div><br></div><div>What I don't understand is that while Ubuntu has IPv6 of course, the VPS host is set to V6 disabled. and as far as I am aware, and my ITSP doesn't have IPv6, so I just can't figure out why two IPv4 systems are getting IPv6 "pollution" as it were. And why now??!</div><div><br></div><div>Anyway, that's what fixed it for me. Thanks!</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 4 November 2016 at 21:31, Jonathan H <span dir="ltr"><<a href="mailto:lardconcepts@gmail.com" target="_blank">lardconcepts@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Two VPSs. Identical setups with the exception of the extension.<br>
<br>
Same version of everything, Asterisk 14.1, Ubuntu 16.10, same firewall<br>
rules and so on - box 2 was cloned from box 1.<br>
<br>
Both VPSs run in the same datacentre.<br>
<br>
Suddenly, after weeks of OK, I'm getting lots of this on ONE box only:<br>
<br>
[Nov 4 21:23:04] NOTICE[1468]: res_hep.c:466 hep_queue_cb: Unable to<br>
send packet: Address Family mismatch between source/destination<br>
[Nov 4 21:23:04] NOTICE[1468]: res_hep.c:466 hep_queue_cb: Unable to<br>
send packet: Address Family mismatch between source/destination<br>
<br>
Googling this brings up something about IPv6, but my VPS is not IPv6<br>
enabled, and nor is my ITSP, who can't think of why this is happening.<br>
<br>
It doesn't appear to be adversely affecting call quality, but it's<br>
making the console a bit busy. I know I can hide it, but I'd be<br>
interested to know if there's anything I can do to diagnose WHY this<br>
is happening.<br>
<br>
Thanks<br>
</blockquote></div><br></div>