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apristen/easy_prerouting_port_forwarding_example.sh

Created January 4, 2022 16:08
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Easy way for TCP and/or UDP ports forwarding from privileged (<1024) to non-privileged (>1024) ports using just iptables PREROUTING.
Raw
easy_prerouting_port_forwarding_example.sh
#!/bin/bash
iptables -t nat -A PREROUTING -p tcp -m tcp --dport 25 -j REDIRECT --to-ports 2525
iptables -t nat -A PREROUTING -p udp -m udp --dport 53 -j REDIRECT --to-ports 5353
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