I'm experiencing a strange problem with NATing on a PIX 515 running 6.3. I have 2 statements:
nat (inside) 1 10.0.0.0 255.0.0.0
global (DMZ2) 1 192.168.194.0 netmask 255.255.254.0
With this config I can get no packets at all to pass from the inside and out of the DMZ2 interface (using debug any any on both interfaces). Yet when I change the global to a /8 mask (i.e 192.0.0.0) packets pass through fine. I've noticed on the debug trace that the source port is altered even where the subnets are of equal size on the nat and global (i.e where both subnets are /8 Port address translation is occurring) so I'm at a loss why the larger (/8) pool cannot be translated sucessfully to the smaller (/23) pool.
Does anyone know of a bug in the software or am I missing some config?
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...