Messages

Hi,
I tried to create an alias for all internal networks and entered all CIDR notations for all internal networks. Then I got this error message. What is the problem here?
Entry "10.0.0.0/8 " is not a network.
Entry "172.16.0.0/12 " is not a network.
Entry "192.168.0.0/16 " is not a network.

Do you have some recommandation for Elkhart based devices?
I could only find this:
https://german.alibaba.com/p-detail/Maxtang-1600441734696.html
which seems ok, but has only 2 LAN Ports. I would prefer something with more ports.