Redirecting the default gateway
A very common use of a VPN is to route all the traffic over a secure tunnel. This allows one to safely access a network, or even the Internet itself, from within a hostile environment (for example, a poorly protected Internet cafe).
Redirecting the default gateway is achieved by adding the line push “redirect-gateway [def1 local bypass-dhcp bypass-dns]” to the server configuration file.
The parameters to redirect-gateway listed previously are optional, but they can play a very important role:
- No parameters added: In this case, OpenVPN will replace the existing default gateway (0.0.0.0/0) with the address of the OpenVPN server itself. An extra route to the OpenVPN server itself is also added so that the OpenVPN traffic ...
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