I have the following scenario that I need some help with.
[CISCO ASA 5540]
[BARRACUDA] [Exchange SRV]
Mail Domain: mail.domain.com (126.96.36.199)
Ok so the mail flows to the Barracuda using a static 1:1 NAT configuration and then gets delivered from the Barracuda to the Exchange server. I want to implement active sync (Direct Push) for Windows mobile devices. They need to communicate with mail.domain.com over port 443. The problem is I want mail to continue to flow to the Barracuda, but direct Direct Push traffic to the Exchange server.
I cnow I can't implement two 1:1 NAT mappings from the same external hostname to 2 different servers. The question is how do I accomplish this.
So basically you will need incoming traffic via SMTP to 10.10.10.2 that goes to the barracuda, but if the request comes on port 443 that it goes to the Exchange? Is that it? If it is, you will need to configure port forwarding instead of 1 to 1 translations.
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