<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I deleted the res_resolver_unbound.so module, and now it works as expected.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">So, the problem is related to the 'unbound' resolver?</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">FYI: I'm using Asterisk 16.2 installed from Debian 10 repository.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif">Best regards,</span><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Leonid Fainshtein<br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 27, 2020 at 3:01 PM Joshua C. Colp <<a href="mailto:jcolp@sangoma.com">jcolp@sangoma.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">On Thu, Aug 27, 2020 at 8:58 AM Leonid Fainshtein <<a href="mailto:leonid.fainshtein@xorcom.com" target="_blank">leonid.fainshtein@xorcom.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif">I see that pjsip_resolver.c tries unsuccessfuly to resolve the hostname each 10 seconds:</div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><span style="color:rgb(0,0,0)">[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Wrapper created
</span><br>[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Set timer to 2000 msec
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: Performing SIP DNS resolution of target '<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: Transport type for target '<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>' is 'Unspecified'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Created resolution tracking for target '<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Added target '<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>' with record type '35', transport 'Unspecified', and port '0'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Added target '_sips._<a href="http://tcp.rpi6.in.xorcom.com" target="_blank">tcp.rpi6.in.xorcom.com</a>' with record type '33', transport 'TLS', and port '5061'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Added target '_sip._<a href="http://tcp.rpi6.in.xorcom.com" target="_blank">tcp.rpi6.in.xorcom.com</a>' with record type '33', transport 'TCP', and port '5060'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Added target '_sip._<a href="http://udp.rpi6.in.xorcom.com" target="_blank">udp.rpi6.in.xorcom.com</a>' with record type '33', transport 'UDP', and port '5060'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Added target '<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>' with record type '1', transport 'UDP', and port '5060'
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Starting initial resolution using parallel queries for target '<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>'
<br>[Aug 27 07:51:36] DEBUG[605] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] All parallel queries completed
<br>[Aug 27 07:51:36] DEBUG[605] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Resolution completed - 0 viable targets
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_resolver.c: [0x7f75282fe7f8] Invoking user callback with '0' addresses
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: PJSIP tsx response received
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Cancelling timer
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Timer cancelled
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: Callbacks executed
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip.c: 0x7f75282eb150: wrapper destroyed
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_options.c: Contact g145/sip:<a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a> status didn't change: Unreachable, RTT: 0.000 msec
<br>[Aug 27 07:51:36] DEBUG[595] res_pjsip/pjsip_options.c: AOR 'g145' now has 0 available contacts<br>
<br></span></div><div><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif">But a DNS server is available at this time:</div><span style="font-family:monospace"><span style="color:rgb(0,0,0)"># host <a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>
</span><br><a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a> has address 192.168.0.175<br>
<br></span><span style="font-family:monospace"><span style="color:rgb(0,0,0)"><span class="gmail_default" style="font-family:arial,helvetica,sans-serif">#</span> ping <a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a>
</span><br>PING <a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a> (192.168.0.175) 56(84) bytes of data.
<br>64 bytes from <a href="http://rpi6.in.xorcom.com" target="_blank">rpi6.in.xorcom.com</a> (192.168.0.175): icmp_seq=1 ttl=64 time=0.990 ms<br></span></div></div></div></blockquote><div><br></div><div>What DNS resolver implementation is in use? system or unbound?</div><div><br></div><div>Asterisk itself doesn't do any caching, we defer it to the underlying implementation. It could be caching a negative response.</div></div><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-family:tahoma,sans-serif"><font color="#073763">Joshua C. Colp</font></div><div style="font-family:tahoma,sans-serif"><font color="#073763">Asterisk Technical Lead</font></div><div style="font-family:tahoma,sans-serif"><font color="#073763">Sangoma Technologies</font></div><div style="font-family:tahoma,sans-serif"><font color="#073763">Check us out at <a href="http://www.sangoma.com" target="_blank">www.sangoma.com</a> and <a href="http://www.asterisk.org" target="_blank">www.asterisk.org</a></font><br></div></div></div></div></div></div></div></div></div></div></div>
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