Hello Jan, the only way to limit the number of registrations (stored ones) is indeed via "max_contacts", but in this case, the newest registration attempts will be dropped. I mean this will protect your server, but the new Xten will not register anymore. regards, bogdan Jan ONDREJ (SAL) wrote: >Hello, > > I have problems with too many branches for latest X-Lite release 1011s >stamp 41150. Other phones are working properly. X-Lites are trying to >subscribe each 40 seconds with different rinstance strings. Example: > >mysql> select contact,last_modified from location where username='1538' >order by last_modified; >+-----------------------------------------------------------+---------------------+ >| contact | >last_modified | >+-----------------------------------------------------------+---------------------+ >| sip:1538@158.197.240.237:51092;rinstance=897b6ff9462755eb | 2007-06-13 >14:17:41 | | sip:1538@158.197.240.237:51092;rinstance=059223be49bdc5a4 | >2007-06-13 14:18:21 | | >sip:1538@158.197.240.237:51092;rinstance=e3b22d920bdd9b61 | 2007-06-13 >14:19:00 | | sip:1538@158.197.240.237:51092;rinstance=163058af66fd3b21 | >2007-06-13 14:19:39 | | sip:1538@158.197.10.104:5060 >| 2007-06-13 15:10:01 | >+-----------------------------------------------------------+------------------- > >After some time there is 30-90 subscriptions for some users (not for all >users of X-lite, but only for lastest Xlite). > >After some time openser is sending many SUBSCRIBE requests to these users >and eats all of CPU, my calls are very slow. > >I am now trying to play with "max_contacts" registrar parameter set to 5. >Is it a problem of X-lite and how to prevent these DOS attacks from wrong >softphones? > >Thank you. > > SAL > >_______________________________________________ >Users mailing list >Users(a)openser.org >http://openser.org/cgi-bin/mailman/listinfo/users > >

Jan ONDREJ (SAL) wrote: Out of curiosity, what is rinstance parameter, and what is it used for? The Internets doesn't seem to know.