We have four different sites connected over public network; Therefore, we are running site-to-site VPN tunnel to encrypt the data. Now we are ready to deploy Voice over VPN between four sites (CM Clusters are already deployed in all the locations).
I know the follwoing:
Standard IPSec copies the Type of Service (ToS) byte from the original IP
header of the Voice-over-IP packet to the new IP header added by IPSec. So
the original packet priority is preserved even after encryption.
However, My question is....
Can we do it on our current PIX firewalls?
what is the right code that we need ?
Does it work right w/single DES?
Any help Would be appreciated
Thanks,
-Zulfi
