About nikolaj777

nikolaj777 · 06-11-2009

Hi,We have a Cisco ASA 5520 in our setup and in the dmz we have a postfix server, where we have applied a certificate and configured postfix to use that certificate.When connecting from outlook 2007 using TLS from the inside and to the postfix server...

nikolaj777 · 06-13-2009

Yes, if you upgrade to the newest firmware (version 8, my ASA is running 8.0(4)) then it support TLS in the esmtp inspection policy.I think that the support was there from version 7.2 or so, but I am not sure.

nikolaj777 · 06-13-2009

TLS is related to smtp. You enable TLS to be able to make sure that the smtp authentication of the user is not sent in clear text. Further you enable TLS to be able to pass data encrypted.Using TLS for SMTP authentication will not use port 465. It us...

nikolaj777 · 06-13-2009

When you have esmtp inspection enabled it does all those things you write, but when using TLS it does not work (the inspection engine strips out the TLS information of the traffic since it things that the protocol is not adhered to) unless you do a f...

nikolaj777 · 06-13-2009

Hi,The problem was not with the ASA in our datacenter, but with my router here at the office.When I disabled esmtp inspection on the router here at the office, it worked.At first I just focused on the ASA, but all along the error was at my local rout...

nikolaj777 · 06-12-2009

I found the error. The error was not in the ASA it was in my Cisco 1811 which is in my office an through which I connect to the internet from the office.The C1811 also had an inspection policy enabled for esmtp, and it was that policy that stripped o...

Member Since	‎06-11-2009 11:41 PM
Date Last Visited	‎08-18-2017 03:54 AM
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Cisco ASA 5520 blocks SMTP when using TLS

Re: Cisco ASA 5520 blocks SMTP when using TLS

Re: Cisco ASA 5520 blocks SMTP when using TLS

Re: Cisco ASA 5520 blocks SMTP when using TLS

Re: Cisco ASA 5520 blocks SMTP when using TLS

Re: Cisco ASA 5520 blocks SMTP when using TLS