[asterisk-users] Asterisk temporary hangs when no internet connection

[Eric Wieling]

Seems like it would have been much simpler just to correct your 
/etc/hosts file.  Most systems check /etc/hosts before consulting DNS 
for IP and host information.

Loic DIDELOT wrote:
> Hello,
> sorry for dropping in so late but I encountered the same problems so I
> started playing around with IPTABLES and DNS servers. 
> 
> For me it looks like asterisk has a problem because it seems to do
> reverse dns lookups (PTR records). 
> 
> For me the following helped:
> I installed a local dns recursor. I used the one from powerdns (apt-get
> install pdns-recursor). Then I put 127.0.0.1 as only nameserver in
> my /etc/resolv.conf. Next thing I did is telling my dns server to be
> contain authoritative data for the "in-addr.arpa" zone. I added the
> following line
> "auth-zones=in-addr.arpa=/etc/powerdns/zone-in-addr.arpa"
> to /etc/powerdns/recursor.conf and then created an empty
> file /etc/powerdns/zone-in-addr.arpa.
> Now things seem to work without internet.
> 
> 
> I do not understand why a PBX is such dependent on internet (DNS)
> connectivity. Maybe someone from the dev list can clear things up.
> 
> If I disable DNS lookups by some router/iptables magic asterisk cant
> even do a normal reload.
wide.