External squid proxy on 2.9.x

Hello.
I want to build a cache system like in link below:
http://wiki.mikrotik.com/wiki/Open_source_caching_server

But under wan interface I want to put different IP, public one (routed ip) not private (192.168.12.11.1, 192.168.12.2)

Is it possible?
Or if you have any idea I will welcome them :slight_smile:

thank you in advance.
502.JPG

Just change the IP address to your WAN interface.

Hello.

I have other fogginess according that tutorial, please.
1.May it works even if the IP of WAN interf is public IP (routed one)?
2.Why NAT must be disabled ?

Best regards & thank you for your help!

Please, may someone help me regarding this issue?

Thank you in advance!