Disable class based route addition

A new classful route is added to the routing table, using the local adapter's IP

Disable class based route addition means that classful route isn't added to your machine

when the VPN starts up, and you'll need to add the appropriate routes for networks that should be routed through the tunnel.

ie.

# 未 tick 前

route print

Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
...
     192.168.30.0    255.255.255.0          1.0.0.1    192.168.30.14     26
    192.168.30.14  255.255.255.255         On-link     192.168.30.14    281
        224.0.0.0        240.0.0.0         On-link     192.168.30.14    281
  255.255.255.255  255.255.255.255         On-link     192.168.30.14    281

# tick 了

    192.168.30.14  255.255.255.255         On-link     192.168.30.14    281
        224.0.0.0        240.0.0.0         On-link     192.168.30.14    281
  255.255.255.255  255.255.255.255         On-link     192.168.30.14    281