Can you suggest a method to configure the PIX 315e firewall to handle Internet (VPN) connections and at the same time allow us to utilize our Public IP addressing scheme for our interion LANs (i.e. 130.xxx.xxx.xxx)? The Internet host PCs will utilize a private IP addressing scheme (i.e. 10.xxx.xxx.xxx).
whereas being able to use your existing IP addresses for your interior LAN's is simply a matter of defining the right address on the inside interface of the PIX, defining any static routes necessary to get to other internal networks, then if you don't want to do NAT at all, use the "nat (inside) 0 0 0" command. The command reference is here:
This question was in response to a consultant who claimed that we could not use the PIX 315e and maintain our internal (public) IP addressing scheme if our remote laptops were to access our WAN via an Internet connection.
He claimed that there is no way the host could find a server within our internal WAN if the Server used a public IP address (i.e. 130.xxx.xxx.xxx). I felt he was incorrect, but needed input from someone with more knowledge about the Cisco system. He said that if there was a way to do this, he'd like someone to show him how it could be done.
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...