Hello
NAT is supported on IPBase images.
The image c2600-ipbase-mz.123-26.bin supports the following NAT features:
NAT - Default Inside Server Enhancement
NAT - Stateful Fail-over of Network Address Translation (SNAT) Phase 1
NAT - Ability to use Routes Maps with Static Translations
NAT - Enhanced H.225/H.245 Forwarding Engine
NAT - Network Address Translation
NAT - Static Mapping Support with HSRP for High-Availability
NAT - Support for NetMeeting Directory (Internet Locator Service - ILS)
NAT - Support of H.323v2 Call Signaling (FastConnect)
NAT - Support of H.323v2 RAS
NAT - Translation of external IP Addresses only
NAT-Support of IP Phone to Cisco Call Manager
Regards
Sush