any-proxy-linux.sh

#!/bin/bash

INTERFACE=ens33
PROXY=proxy.local:8080

if [[ "$EUID" -ne 0 ]]; then
    echo "Please run as root"
    exit 1
fi

cleanup() {
    iptables-save | grep -v -- 'ANYPROXY' | iptables-restore
}

trap cleanup TERM KILL QUIT EXIT HUP
sysctl -w net.ipv4.ip_forward=1
iptables -t nat -N ANYPROXY
iptables -t nat -I PREROUTING 1 -j ANYPROXY
iptables -t nat -I OUTPUT 1 -j ANYPROXY
iptables -t nat -A ANYPROXY -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128
iptables -t nat -A ANYPROXY -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 3128

echo "Proxy started (C-C to quit)"
any_proxy -l :3128 -p=$PROXY