I try to set port range for NAT interface overload mapping on Cisco 2921 router running IOS version 15.5. It doesn't seem to have feature to set it up. Does anyone know other ways? Should I upgrade the IOS to see new IOS will support port range set up?
Try something like (this example is for two different servers):
POOL1 is the first internal server and ports 100 to 300 are NATed through. POOL2 is a second server and ports 500 to 1000 are NATed through.
ip nat pool POOL1 192.168.1.1 192.168.1.1 netmask 255.255.255.0 type rotary ip nat pool POOL2 192.168.1.2 192.168.1.2 netmask 255.255.255.0 type rotary ip nat inside destination list 101 pool POOL1 ip nat inside destination list 102 pool POOL2 access-list 101 permit tcp any any range 100 300 access-list 102 permit tcp any any range 500 1000
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