Hi, I'm pretty ignorant about Kamailio, sorry for it and possible terminology mistakes. I'd like to allow any user to register. Ideally, I'd like to make some script (Lua/whatever) function to check some data encoded in a username and allow registering based on that username only. I undefined WITH_AUTH in kamailio.cfg, and it used to work for me; but sometimes I'm starting to get "SIP Progress: 100 trying -- your call is important to us ()" and the call never reaches the other party. Here's a sample of my logs during the failed call: https://gist.github.com/singalen/c343f09b67dcf7731fe0 What is the problem here? I start and stop the clients all the time, so there might be some garbage registrations accumulated. I assume I also need a user registration to discard all his previous registrations? Thank you!