How to specify particular source address & port in iptables:
- Source ip (-s)
- -s, --source address[/mask][,...]
- Destination (-d)
- -d, --destination address[/mask][,...]
- Source Port:
- --source-port,--sport [!] port[:port]
- Destination port:
- --destination-port,--dport [!] port[:port]
- protocol
- -p <protocol name, tcp, udp, icmp>
Example:
iptables -t nat -A PREROUTING -p tcp -s 192.168.1.99 --sport 58902 -d 173.223.52.123 --dport 80 -j DNAT --to-destination 192.168.1.254:80
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