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Handbook

Mirroring SSL inspected traffic

6.0.0
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It is possible to "mirror" or send a copy of traffic decrypted by SSL inspection to one or more FortiGate interfaces so that the traffic can be collected by a raw packet capture tool for archiving or analysis. The mirroring occurs after being processed by the SSL decoder and in the same point in the work flow as the decryption of application data. The decrypted application data is wrapped inside a TCP packet (with IP and Ethernet headers), and then sent to the mirror port.

This feature works when the inspection mode is set to flow-based, but not for explicit proxy.

caution icon Decryption, storage, inspection, and use decrypted content is subject to local privacy rules. Use of these features could enable malicious users with administrative access to your FortiGate to harvest sensitive information submitted using an encrypted channel.

In this example, the setting enables the policy to send all traffic decrypted by the policy to the FortiGate port1 and port2 interfaces.

config firewall policy

edit 0

set ssl-mirror enable

set ssl-mirror-intf port1 port2

end

It is possible to "mirror" or send a copy of traffic decrypted by SSL inspection to one or more FortiGate interfaces so that the traffic can be collected by a raw packet capture tool for archiving or analysis. The mirroring occurs after being processed by the SSL decoder and in the same point in the work flow as the decryption of application data. The decrypted application data is wrapped inside a TCP packet (with IP and Ethernet headers), and then sent to the mirror port.

This feature works when the inspection mode is set to flow-based, but not for explicit proxy.

caution icon Decryption, storage, inspection, and use decrypted content is subject to local privacy rules. Use of these features could enable malicious users with administrative access to your FortiGate to harvest sensitive information submitted using an encrypted channel.

In this example, the setting enables the policy to send all traffic decrypted by the policy to the FortiGate port1 and port2 interfaces.

config firewall policy

edit 0

set ssl-mirror enable

set ssl-mirror-intf port1 port2

end