BUG: Archer C7 doesn't forward ports when the subnet mask is set to 255.0.0.0
BUG: Archer C7 doesn't forward ports when the subnet mask is set to 255.0.0.0
I recently bought a tp-link router model Archer C7 (firmware 1.0.4 Build 20180425 rel.72768(5553)). After some trial an error I figured out this router doesn't forward ports when the subnet mask is set to 255.0.0.0:

When I change the subnet to 255.255.0.0 or 255.255.255.0 it works fine:

If I plug my old TP-LINK wr841n it works with the subnet mask 255.0.0.0:

Hope this post helps someone.
