On 05/02/10 09:15, Randy R wrote: > On Fri, Feb 5, 2010 at 8:41 AM, Olle E. Johansson <o...@edvina.net> wrote: >>>> What I have seen on my asterisk box when I had a up/down adsl line was >>>> that the asterisk box couldn't do dns resolution and would hang( well no >>>> other internal calls could be made, seemed like some sort of semaphore >>>> was stuck) when the adsl came up and dns could be done, everything >>>> worked fine again > > Confirmed and experienced years ago in a release far, far away. > >> Yes, that is the case. Asterisk doesn't have asynchronus DNS support, so in >> order to work when the link is down, you need a local resolver, like a >> caching BIND server, on the same host. The calls to DNS resolvers in >> Asterisk is synchronus, so Asterisk will wait for the response to arrive. > > IIRC, at the time I had this problem, asterisk did not answer analog > phone lines either so as a company we had no phones and had to revert > to regular telephones plugged into the wall. Even if Internet is > working, if the configured DNS is down, you're still sunk. This sorely > needs to be fixed IMO. > > /r > Also had this many times, the installation and config of dnsmasq fixed it for my systems.
DC
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