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RV180 DNAT

aton12345
Level 1
Level 1

Hi!

is it possible to do DNAT on the RV180 without SNAT? The servers in my LAN cannot see client IPs but instead only the gateway IP.

Greetings

3 Replies 3

aton12345
Level 1
Level 1

further explanation of this feature ("bug"?):

- remote client: 205.251.242.54

- http server inside the LAN: 10.13.13.13

- rv180 LAN 10.13.13.10, port forwarding on port 80(http) active to 10.13.13.13

now some client connects from the internet to the RV180.

observed behaviour:

(tcpdump on the http server)

12:20:00 IP 10.13.13.10.37060 > 10.13.13.13.http: Flags [S]

the destionation address has been correctly replaced by the http servers IP. but the source address has been replaced by the routers LAN IP. this is the  behaviour of a proxy, right?

expected behaviour:

12:20:00 IP 205.251.242.54.37060 > 10.13.13.13.http: Flags [S]

only the destination address should be replaced.

The bug probably is located in the access rules module, -> even if no SNAT is specified, it does SNAT with the source IP of the router.

Here another weird thing in the same module, i configure port forwarding to 10.13.13.13 port 80:

and then on the rules page, the ip is not listed:

This module needs work, I hope to see a firmware upgrade soon.

it seems firmware 1.0.3.10 fixes SNAT, IP is still not shown in the access rules.

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