I need someone to setup my RPi 3B+ (fresh install with Raspberry Pi OS V.10) with a Squid proxy and multiple network interfaces.
At the moment I have several 4G/LTE USB-Dongles connected to my RPi (each of them with a SIM-Card). Now I want to use the internet-connection of the 4G-Dongles from other devices in the internal network.
If I access my RPi on Port 4667 with my laptop I want to proxy through one specific 4G Dongle (specific = 4G Dongle has a specific IP-Address of e.g. [login to view URL]). If I access my RPi on Port 4668 I want to proxy the requests through a different 4G Dongle, e.g. 192.168.1.31.
Goal: when I am connected to one of the proxies with my laptop, it should seem like the 4G-Dongle is the normal/only connection of my laptop. There shouldn't be a ipv6 leak or anything that would reveal the public ip-address of my laptop.