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Shawn, I am running ISA 2004. As you know this
firewall is not SIP aware. I’ve spoken with MS LCS devs and they don’t
know of any SIP filters on the horizon. As far as IAX… not sure why you
would be having problems. In our environment we have an ISA 2004
firewall at the central office and several remote offices with a site-to-site
VPN nailed up using one of the Linksys VPN routers. There is an article on
isaserver.org for establishing a site-to-site using IPSEC tunneling a new
feature of ISA 2004. This works extremely well! SIP traffic is routed around ISA using a
product by INGATE called the SIPARATOR. This helps us with inbound SIP calls
and in/out bound calls to broadvox.net who provides PSTN gateway functionality. As far as clients…. The cisco 7960 is the only way to go in my
mind. Once you get the infrastructure setup to support them they are solid! As
far as softphones…we use XTEN and try to use messenger. Both solutions
work via site-to-site VPN or dial-up VPN using the standard PPTP. The latest
version of XTEN seems to work the best. I would love to jump on the IAX bandwagon
but have several partners to work with. I this case I must choose SIP. Thanks, From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Shawn Dillon I have just finished compiling and installing Asterisk on a test
Debian system. All is working well. We are now attempting to get remote offices
to test the system I have installed both a SIP and an IAX client at a remote
office. Then I connect to our office via Microsoft ISA firewall and the Windows
XP VPN client. Neither of the softphones will connect. On the IAX softphone I
just get a ringtone , on the SIP client nothing. The Debian machine has two
NIC’s , one with a static external IP and one with an internal IP. Our
remote offices are behind a mixture of firewalls. I have some questions with regards to our testing and setup. 1) Is there a
way to get the SIP/IAX client to work via the VPN? This would be the easiest
way. 2) If not can I
install a STUN server on the same machine as the * server? Can it use the same
internal and external IP’s as the * server? 3) Is there a
hardphone that supports VPN that has been tested? 4) What is the
best hardphone to use with Asterisk? Thanks for the input Shawn Dillon |
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