Hi. What is the proper way of gateway identification in incoming call? The variable_sip_gateway looks like directly taken from the sip_req_user (username from INVITE). Examples: I am using two FS, FS2 as a gateway for FS1. Gateway name "testgw", username "testuser", and a lua script dumping variables. Case 1: ======= Simple configuration according to FS wiki. Everything looks fine, incoming call from FS2: FS2: Registred as: Contact: "user" <sip:gw+testgw@212.180.x.x:5080;transport=udp;gw=testgw> FS1: variable_sip_gateway: testgw Case 2: ======= Configuration with added: <param name="extension-in-contact" value="true"/> FS2: Registered as :Contact: "user" <sip:testuser@212.180.x.x:5080;transport=udp;gw=testgw> FS1: variable_sip_gateway does not exist (!) Case 3: ======= Configuration from Case 1. I am using Linksys SPA adapter, calling FS1 directly by ip, using "gw+testgw" as a destination user/number. FS1: variable_sip_gateway: testgw (looks like serious security flaw) -- Artur Cichocki