[Asterisk-Users] Asterisk stops responding when internet is down

[Joshua Colp]

Asterisk is sensitive when it comes to DNS lookups. If the DNS server
configured on your Asterisk server is not reachable, Asterisk may block
while waiting for a result. This can cause chan_sip to hang and not allow
phones to register, or calls to be placed. One solution is to run a DNS
server on the same machine, and cache results or use IP addresses instead of
hostnames.

-- 
Joshua Colp
Software Developer
Digium
P - 256-428-6066
C - 506-878-0147
jcolp at digium.com

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