I'm failing to configure the SIP account correctly.
I enter the following data:
User: <1und1 phone number starting with 49...>
Authentication User: <1und1 phone number starting with 49...>
Using another application "PhonerLite" with exactly the same data, the connection works.
But with Ekiga 3.2.7 I get this error message:
Status: Cound not register (Forbidden)
Are there any other configuration settings that needs to be modified?