What what seems to be the issue you’re running into with the WAN settings?
I have an old 2005CD/MPI/PSTN (part no. EW26264-00-#03), firmware version 393219. The LAN is at 172.20.0.1 and there are a couple of PLCs and one HMI connected to it.
I would like to connect my laptop (10.21.27.19) to the WAN and be able to access the PLC (172.20.0.6). According to KB-0001-00, I should be able to do this by activating NAT 1:1 feature, unfortunately the device I have is fairly old and there is no interface as described in KB-0001-00.
I am wondering if there is any other way to accomplish this with my old device.
Unfortunately, the Nat 1:1 isn’t a feature that’s available in the CD series devices