Is it possible to change the user portion of the URI in the contact header ? I know you can change it when originating a call using sip_contact_user but there doesn't appear to be a way to change this on a per-profile basis so that it's also used in REGISTER and NOTIFY. I want to hide it in order to obscure what I use for security - in much the same reason as you would disable or obscure the Server header in Apache HTTPD or the greeting from an SMTP server. Anywhere someone sees mod_sofia@ they know FreeSWITCH is at the other end and can refine an attack based on this. I appreciate that FreeSWITCH is quite secure, and there aren't many known exploits for it - but every little helps to give a potential intruder less information to go on. Ross