-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all,
I have a server currently running Asterisk 1.0.7 placed out in the wild (i.e. not behind NAT). I have groups of sip clients all behind various NAT firewalls (mainly adsl routers). Up to now I've mainly used Sipuras and not had any serious problems. Recently I've been experimenting with Snom phones and I have encountered problems where the Snoms register fine initially but after a while (which could be anything from 2minutes to 45 minutes) they lose their registration. Sample snom configuration in sip.conf follows: [888120] type=friend username=888120 mailbox=888120 canreinvite=no nat=yes secret=secret host=dynamic qualify=yes context=sipdemo subscribecontext=sipdemo I've experimented with several different adsl routers and was surprised at the difference this can make, however the problem is still there to a greater or lesser extent. I've also tried using a Stun server following recommendation here: http://www.asteriskguru.com/tutorials/sip_nat_oneway_or_no_audio_asterisk.html Again this makes a difference, but doesn't entirely solve the problem - there are still occasions where the Snom is unreachable or unknown. The implication seems to be that if asterisk does not send keepalives often enough then the way through the nat is lost. I've also tried lowering the expiry time of the asterisk sessions (in increments down to 30 seconds) in the hope that it would result in more activity and keep the firewall open, but it didn't help. Another strange factor is using the BLF on snoms - the situation seems to be worse with those enabled, but that might not be relevant. So I guess I have a few questions: 1) Has anyone had this happen before and what, if any, was the solution? 2) How do I increase the frequency with which asterisk sends keepalives? 3) Does SER handle this better - would placing this outside the NAT help handle connections from inside? 4) Do newer versions of asterisk handle this better? 5) Any other suggestions? TIA. - -- Richard Watson -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDeGAzP05lUVhVYk0RAkM1AKCepBdfTkLoqwNlnbMpH3CWGTWCcwCeOFlE jbKdXnKHNqG7951KlctSfek= =ttdo -----END PGP SIGNATURE----- _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
