[Serusers] ser configuration issues

[AChin63457 at aol.com]

I just started installing ser  the other day and the installation was smooth 
and painless.  I am know  not quite sure about about the configuration files 
and how to set  them.  Here is my current setup --  I have a fedora 3 linux box 
 obtaining a dhcp assigned address with currently no hostname set and no 
FQDN--  localhost.localdomain.   I signed up the other day to iptel.org to  
register for a username and password -- ie, _example at iptel.org_ 
(mailto:example at iptel.org) .
 
So i have 2 issues.   1.  What should i specify in my /etc/profile for 
SIP_DOMAIN -- should  i use my _example at iptel.org_ (mailto:example at iptel.org)  or my 
internal lan address or my wan address  available to the outside?
 
2.  Same question when  it comes to configuring the  
/usr/local/etc/ser/ser.cfg
what should be listed on  the listen parameters
listen=127.0.0.1
listen=192.168.x.x or should  it be the wan address
 
also can i use the  alias
alias=_example at iptel.org_ (mailto:example at iptel.org)   or should this be my 
machines  hostname. 
 
Regards,
 
Alfred
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