if you want to make use of that IP range for some PC's/subnets or servers, you can directly create NAT entries (static/dynamic or PAT) with those new public IP addresses for any new inside subnet. Just make sure you add routes on the internet router for this new public pool to reach the PIX outside..
YOu need to do the following:
1) Identify the subnet/ host which requires to go out to internet with the new IP range
2) You should not use the same subnet which is presently using the old IP.
3) configure NAT/PAT with the inside subnet to the new IP address pool on the outside
4) add routes on the internet router for the new pool directed to the PIX outside.
5) check the connection
If you are thinking of configuring a new /30 subnet on the PIX with the new IP pool, it isnt possible, since PIX does not support configuring multiple IP addresses on a single interface , like routers (secondary IP).
Hope this helps.. all the best.. rate replies if useful..
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...