WebProxy + NAT

Hi to all,
I’m using router os 4.9 web proxy configured to run on port 8000.
It is a transparent proxy because I redirect all traffic to port 80 at port 8000.

Today I visited a website and compiled a form for an information.
The site administrator reply to my form request and at the end of his mail there was also my public ip. All this it’s ok. But the mail report also my real ip address 10.0.0.26 that is the real ip assigned in the lan to my pc.

In which way is it possible to view my internal ip address???

The proxy adds a header “X-Proxied-For” that is set to the real IP address of the client.

proxy sends ‘X-FORWARDED-FOR’ field in the request

And is it possible to disable it?

not in RouterOS, I believe