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a_basharat_2591's avatar
a_basharat_2591
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Apr 29, 2019

SMTP [port25] VS configuration

Hi, I need to configure an SMTP [port 25] Virtual Server. I am used to configure VSs on port 443, my question regarding the new VS for SMTP is what I need to configure on the 'Configuration' section ...
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Per_Hagstrom's avatar
Per_Hagstrom
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Apr 29, 2019

It might depend on how you want the SMTP traffic to work.

 

In my case with an Exchange 2016 server, the "default" SMTP setup caused us to not see the originating client IPs, which is a big deal for us, and since it's not HTTP/S traffic, X-Forwarded-For is of no help. I did get it to work by changing the Type to 'Performance (Layer 4)', and creating a fastL4 Protocol Profile (Client), and setting it to 'Loose Close: Enabled'

 

Source Address Translation: None

 

Source Port: Preserve Strict

 

Hope that helps?

 

Per_Hagstrom's avatar
Per_Hagstrom
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Apr 30, 2019

I think in my example, the traffic is "tunneled" through the F5, and the SMTP/TLS settings are all set on the Exchange server itself. So I believe you could use my example fine, if you want to keep the client IPs intact. (which is the main purpose I set it up that way) I guess, give it a try and see if it works?