How can I map ports on my public ip to private ips?

[john99999]

How can I map ports on my public ip to private ips?

I have a linux firewall/router running ip tables with and ip of xx.45.123.90
and 4 internet cameras on the public network at ips
10.10.0.100
10.10.0.101
10.10.0.102
10.10.0.103

how can i map

http://xx.45.123.90:2000

to 10.10.0.100

http://xx.45.123.90:2001

to 10.10.0.101

http://xx.45.123.90:2002

to 10.10.0.102

http://xx.45.123.90:2003

to 10.10.0.103

 

[zeland]

iptables -A PREROUTING -t nat -i [external interface] -p [tcp/udp] -d xx.45.123.90 --dport 2000 -j DNAT --to-destination 10.10.0.100:2000
iptables -A FORWARD -i [external interface] -p [tcp/udp] -d 10.10.0.100 --dport 2000 -j ACCEPT

replace text in intalics to what every suits your environment.


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