Exchange server & ASA 5540 outside interface sharing same IP address?
Need some assistance here?
1.Need email access from outside but don't have a dedicated public IP for mail server. Can i share the same IP for both like the way ISA works? i.e PAT inside to outside then static NAT for exchange IP to public IP & allow smtp access from outside?
2. Need to inside to access DMZ without translation. I have done this:
ip address 172.31.1.2 255.255.255.0 standby 172.31.1.3
ip address 192.168.168.1 255.255.255.248 standby 192.168.168.2
Re: Exchange server & ASA 5540 outside interface sharing same IP
In PIX 6.0, the Port Redirection(Forwarding) feature was added to allow outside users to connect to a particular IP address/port and have the PIX redirect the traffic to the appropriate inside server; the static command was modified. The shared address can be a unique address, a shared outbound PAT address, or shared with the external interface.
when a host on one PIX Firewall interface initiates a connection to a host on another interface, the PIX must have a way to translate that host's IP address across itself. Even if it is not necessary for the IP address to be translated, a translation must still occur. Therefore, in order to allow hosts on the inside access to hosts on the DMZ, a translation that does not actually translate must be configured.
Refer the following url for more info on allowing Inside Hosts Access to a DMZ without Translation:
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,
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