SSL Inbound decryption and SMTP
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SSL Inbound decryption and SMTP

L2 Linker

Hi,

 

does anybody have issues with ssl inbound decryption and setting the smtp decoder in AV Profile to reset-both (antivirus + wildfire)? When the firewall receives an email (with ssl/tls enc enabled) and successfully decrypt the message and found a virus the firewall is not sending a SMTP response code 541. The firewall just block/reset the session. so the sender will never be notified. Without ssl/tls enabled (ssl/tls disabled between spam/av <--> reveiving mailserver) the firewall send a SMTP response code 541.

 

Example:

 

Mail server (sending) ---SSL/TLS---> Spam/Antivirus Scan (Cloud-based Internet Security Services) ---SSL/TLS---> PA - Firewall ---> Mail server (receiving)

 

just wondering - i have also opened a case with pa support. we are running on panos 8.0.8.

 

thx

bastian

1 REPLY 1

L2 Linker

PA does not support sending SMTP response code "541" while SSL Inbound decryption is enabled. It s normal behaviour that the PA just drop the session. You have to configure SSL Forward Proxy instead.

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