05-04-2018 05:21 AM - edited 05-07-2018 07:21 AM
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
06-25-2018 01:49 AM
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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