What are the limitations of Windows 2003 NAT?

-> Supports only TCP/IP
There is no support for IPX or other protocol.
No support for:
-> SNMP (so we cannot do SNMP monitoring for our NAT devices)
-> LDAP
-> Com / Dcom
-> Kerberos V5
-> RPC
-> IPSec
Note: Windows 2000 NAT doesn’t allow L2TP traffic, it allows only PPTP traffic.