Although this prevents
malicious actors from intercepting and manipulating connections,
it also prevents
forward proxy decryption because
the firewall creates an impersonation certificate instead of the
server certificate to present to the client. Instead of one session
that connects the client and server directly, forward proxy creates
two sessions, one between the client and the firewall and another
between the firewall and the server. This establishes trust with
the client so that the firewall can decrypt and inspect the traffic.