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| #!/bin/bash | |
| # Your network interface | |
| INTERFACE="end0" | |
| # Clear existing rules | |
| iptables -F | |
| iptables -t nat -F | |
| # Enable IP forwarding | |
| echo 1 > /proc/sys/net/ipv4/ip_forward | |
| # Create REDSOCKS chain | |
| iptables -t nat -N REDSOCKS 2>/dev/null || iptables -t nat -F REDSOCKS | |
| # Don't redirect local traffic and private networks | |
| iptables -t nat -A REDSOCKS -d 0.0.0.0/8 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 10.0.0.0/8 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 127.0.0.0/8 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 169.254.0.0/16 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 172.16.0.0/12 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 192.168.1.0/24 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 224.0.0.0/4 -j RETURN | |
| iptables -t nat -A REDSOCKS -d 240.0.0.0/4 -j RETURN | |
| # Redirect remaining TCP traffic to redsocks | |
| iptables -t nat -A REDSOCKS -p tcp -j REDIRECT --to-ports 12345 | |
| # IMPORTANT: Don't proxy redsocks' own traffic to avoid loops | |
| iptables -t nat -A OUTPUT -p tcp -m owner --uid-owner redsocks -j RETURN | |
| # Apply REDSOCKS only to traffic from other devices (not local) | |
| iptables -t nat -A PREROUTING -p tcp --dport 1:65535 -j REDSOCKS | |
| # Enable NAT/masquerading | |
| iptables -t nat -A POSTROUTING -o $INTERFACE -j MASQUERADE | |
| # Allow forwarding | |
| iptables -A FORWARD -j ACCEPT | |
| echo "Safe gateway rules applied" |
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