what i want is for it to use your caller id as an authentication method, and have the caller id numbers stored in a text file, maybe in /etc/asterisk/passwords.txt
is this possible, if so please specify in what format should i have the numbers in the passwords.txt
Well it wont as it is, you need to ammend it to your requiremnts and add the entries to the database, But yes it does work and is used extensively on all my sites.