Setup webmail with public IP on a ASA 5512x

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Jun 4th, 2014
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I have a 5512x Running ASA Ver 9.1(2) ASDM  Ver 7.1(3) and I am trying to figure out how to setup my companys Webmail, The webmail is on a public ip addres seperate from the address of the ASA, the request will be coming in the 0/0 port from the outside looking for the webmail address, so how would I set this up. with a static route or?




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smason1970 Wed, 06/04/2014 - 08:29
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Could I add a nat rule and create a network object for the owa ip, say source interface outside destination int any, destination address OWA?  just a thought..:)

Lee Dress Wed, 06/04/2014 - 09:08
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Create a network object with the inside IP Address of your OWA server (ie and add a static nat

object network owa-server

 nat (inside,outside) static interface service tcp https https

then create an access rule to allow outside traffic to be directed to that server

access-list outside_access_in extended permit tcp any host eq https

that should be all you need. then to access the server, just type in your public IP Address i.e.  (or if you have dns setup, you would do  and you should be good.

Hope this helps.


smason1970 Wed, 06/04/2014 - 14:09
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Ok thanks for that reply I havent tried it yet , I went live with this after work and our echange can send email but not recive. strange

Marvin Rhoads Wed, 06/04/2014 - 14:33
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Even though your client sends and receives with https when using OWA, the server also needs to be able to receive mail (from external servers) via smtp (tcp/25). So add an ACL entry to the outside_access_in list above with "eq smtp" at the end. e.g.:

access-list outside_access_in extended permit tcp any host eq smtp


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