efw as external proxy for pfsense

[Guest]

[arzachena]

Hello,
i've setup a port forwarding in pfsense for LAN address and ports 80 and 443 with destination my EFW box (single green nic) to have an external transparent proxy for my guest LAN (no, I don't want to run squid on my firewall).
Currently HTTP works, but HTTPS does not. It seems like the connection cannot get tunneled, in the log I have this error:

Code:

error:unsupported-request-method

On my allowed port list I have:

443 # https
563 # snews
3001 # ntop

and i can't get it running even after adding to squid.conf

Code:

acl SSL_ports port 443

any hint?

thank you