There is no hardware based firewall module for the access router series (only the FWSM in the 6500/7600 platforms). There is however a software based firewall feature set available for the 2600 series. It would just be an IOS upgrade (and possibly some memory and flash). Here is some infomation concerning this feature set:
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...