[asterisk-users] Telco with multipe SIP servers

Michelle Dupuis mdupuis at ocg.ca
Sun Feb 2 11:27:01 CST 2014


We are developing an Asterisk intrusion detection & prevention tool which will allow you to limit connections by geographic region (continent/country/region/city), and include/exclude IP subnets, etc.

If you are interested let me know off-list (we're looking for beta testers!).  


From: asterisk-users-bounces at lists.digium.com [asterisk-users-bounces at lists.digium.com] On Behalf Of Markus Reschke [madires at theca-tabellaria.de]
Sent: Sunday, February 02, 2014 9:42 AM
To: Asterisk Users List
Subject: [asterisk-users] Telco with multipe SIP servers


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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