[asterisk-users] Telco with multipe SIP servers

Markus Reschke madires at theca-tabellaria.de
Sun Feb 2 08:42:28 CST 2014


My telco is Deutsche Telekom and they got about 30 SIP servers right now. 
Currently I've set up a template for incoming calls in sip.conf and added 
each SIP server by it's IP address like this:




I've done that to improve security and to be able to assign all calls 
coming in via Deutsche Telekom to a dedicated dialplan context. 
Unfortunately this approach is not scalable and it's a PITA to maintain a 
list of server IP addresses since Deutsche Telekom will get more SIP 
servers in the future. They've started to migrate the classic POTS/ISDN 
network to VoIP, the goal is get it done by 2016. Customers with DSL get 
VoIP directly, i.e. they need SIP phones or a SIP PBX, and customers with 
a phone line only are converted by the MSAN. And they don't provide an 
official list of the SIP servers :-( By some reverse engineering I found 
out that all SIP servers are within a specific subnet. Is there any way to 
match peers by subnet(s) instead of FQDNs or single IP addresses? If not, 
it would be a feature really needed to be able to cope with telcos running 
multiple or tons of SIP servers.

cu, Markus
/ Markus Reschke \ / madires at theca-tabellaria.de \ / FidoNet 2:240/1661 \
\                / \                             / \                    /

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