Hi list, i ran into a problem configuring the german voip-provider 1und1.de as a gateway. I have not completed my configuration yet, but in a first test the registration fails: The response to the second REGISTER message is "403: Contact User und Anrufernummer verschieden" (en: 403 Authentication User Name does not match account name). The visible difference between the REGISTER of freeswitch and the (working) SIP-client twinkle is indeed the user-string in the contact-header. Freeswitch: (gw + name) Contact: <sip:gw+1und1.de@<public-ip>:5080;transport=udp;gw=1und1.de> Twinkle: (extension / login-user) Contact: <sip:4921XXXXXXXXX@<public-ip>;transport=udp>;expires=3600 If this is the cause of the error message, is this expected behavior of a provider? And more important is it possible to configure freeswitch to set a specific contact-user? Thank you for your time. Christian Tausch -- Attachment (conf/directory/default/1und1.de.xml): <include> <user id="1und1.de"> <gateways> <gateway name="1und1.de"> <param name="realm" value="1und1.de"/> <param name="username" value="4921XXXXXXXXX"/> <param name="password" value="password"/> <param name="auth-username" value="4921XXXXXXXXX"/> <param name="proxy" value="1und1.de"/> <param name="expire-seconds" value="600"/> <param name="register" value="true"/> <param name="retry-seconds" value="30"/> <param name="context" value="public"/> </gateway> </gateways> <params> <param name="password" value="password"/> </params> </user> </include>