hi, i have been trying to use the allow_trusted() to allow or disallow invite request from certain IP address. This is the block that i am using: loadmodule "permission.so" ...... ........ if(is_method("INVITE")){ if(!allow_trusted()){ sl_send_reply("403","Address Not allowed"); exit; } } but trying to restart kamailio after this fails. and from the syslog it says: Oct 9 03:19:49 ubuntu kamailio: ERROR: <core> [sr_module.c:378]: ERROR: load_module: could not find module <permission> in <//lib/kamailio/modules_k/://lib/kamailio/modules/> Oct 9 03:19:49 ubuntu kamailio: : <core> [cfg.y:3330]: parse error in config file //etc/kamailio/kamailio.cfg, line 151, column 12-26: failed to load module Oct 9 03:19:49 ubuntu kamailio: : <core> [cfg.y:3333]: parse error in config file //etc/kamailio/kamailio.cfg, line 356, column 21: unknown command, missing loadmodule?#012 I think i forgot to compile kamailio with the support of permission module . but i do not see it anywhere in the ignore list either. can anyone tell me what could be the problem -- Regards Shrouk Khan (Khan) System Administrator / Telecommunication System Developer Office: +354 4400807 (Reykjavik) +44 2031370800 (London) Mobile: +66 875049439 (Bangkok) Web: www.softverk.is Reykjavik, Iceland // London, UK // Bangkok, Thailand