VOS3000 IPtables for port changing VOS3000 client and security

Use below rule to change your vos3000 client to access server on different port as 7899 or change as per your requirement

iptables -A PREROUTING -t nat -p tcp -m tcp –dport 1202 -j DNAT –to-destination :3720
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 7899 -j DNAT –to-destination :1202
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 1202 -j DNAT –to-destination :3720
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 7899 -j DNAT –to-destination :1202
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 3306 -j DROP
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 2501 -j DROP
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 1202 -j DROP
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 1205 -j DROP
iptables -A PREROUTING -t nat -p tcp -m tcp –dport 143 -j DROP
iptables -A POSTROUTING -t nat -p tcp -m tcp –dport 7899 -j MASQUERADE
iptables -A POSTROUTING -t nat -p tcp -m tcp –dport 7899 -j MASQUERADE

Download  IPtables list and modify as per your requirement
Download iptables
Edit and upload iptables.txt on your server and apply the iptables rule
#iptables-restore  <  /your upload path/iptables.txt

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