This should not be a problem. Keep in mind if all you are using is a PIX then you can't get any QoS. Are you doing a VPN tunnel back to your company? Give a litle more info on how the connection is going to be set up and the VoIP gurus will chime in.
Well we have a demo room that has voip setup in it along with my firewall. I just wanted to staticaly translate an ip address to the call manager and have the phone at my house behind a dsl connection. Do I need a vpn tunnel? I am sure this has been done but have not found and good documentation of it.
If I understand what you are planinig on doing is mapping a public IP to the private IP address of the Call Manager. If I not mistaken this would require putting a public IP address on the IP Phone as well. The VoIP gurus can confirm this but I think that would be the case. In the absense of a VPN I don't see another way for the phone to get to the Call Manager but this could just be my limited knowledge. I seem to recall another post about putting CM on a public IP and some security gurus shot it down. Can't remember why though. Why don't you at least make things a little more secure and have the PIX create a tunnel back to the company and keep your data and phone calls more secure? I knwo someone doing this now w/o any problems with just a PIX and a cable modem but he is using a VPN.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...