Does the phone ocasionally prompt the user for a password? -Mike > -----Original Message----- > From: Richard Watson [mailto:[EMAIL PROTECTED] > Sent: Monday, November 14, 2005 5:00 AM > To: [email protected] > Subject: [Asterisk-Users] Snom clients deregistering > > -----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_aud > io_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----- > >
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