config files and name resolution
said by nitzan:What, in your opinion, would then be the point of the supposed dnsmgr? said by sokhapkin:
No, it will not re-lookup! When dnsmgr is off asterisk does name resolution once and forever.
Interesting. That makes zero sense. The whole point of having a TTL is to have lookups refreshed when they expire... oh well, good to know.
It actually makes perfect sense when you think about it from the programming perspective: name resolution is only done when you load the config, so TTL plays no role whatsoever.
Basically, such a setup is only one step further from hardcoding IP-addresses by hand. A lot of system tools are designed like this (for one, firewalls come to mind, and ping, and ssh, and basically every other simple tool).