option push route

push "route 10.10.0.0 255.255.255.0"

This directive, typically found in the OpenVPN server’s configuration file, tells the server to force connecting clients to add a specific route to their local routing table.

Explanation of `push "route..."`

The purpose of this command is to ensure that the client knows how to reach resources on the remote network (the network the OpenVPN server is connected to).

Part	Meaning
`push`	Instructs the server to send this configuration setting to the client upon successful connection.
`"route"`	The specific command being pushed, telling the client to add a new network route.
`10.10.0.0`	This is the Network Address (Destination) for the remote network. Any traffic destined for an IP starting with 10.10.0.x will use this route.
`255.255.255.0`	This is the Netmask that defines the size of the remote network. A `255.255.255.0` netmask means the network encompasses all 254 usable addresses from `10.10.0.1` to `10.10.0.254`.

How the Route Works

When the client receives this command:

It adds an entry to its operating system’s routing table.
The entry specifies that any data packets destined for the 10.10.0.0/24 network must be sent through the VPN tunnel (the virtual network interface created by OpenVPN, e.g., tun0).

In essence: This line ensures that when the VPN is active, the client can access the server’s internal network (like file servers, databases, or printers that use 10.10.0.x addresses) without accidentally routing that traffic through its regular internet connection.