Comments on: How to set up VPN split tunneling on Mac – 3 options explained

By: WizIT

WizIT — Tue, 16 May 2023 18:21:09 +0000

My OpenVPN assign me IP 10.0.8.10 on utun3 My home MacOS assigned 192.168.75.2 by home router on en0 interface. Need t access organization network over VPN running on 172.16.x.x network. One of the Machine is Proxy Server with Port xxxx which is used for accessing Office365 email. File folders are shared over 172.16.x.x network.
How to route all normal traffic (home heavy traffic directly to the Internet) while only selected accessing network 172.16.x.x via VPN? Thanks!

By: Wayne

Wayne — Wed, 13 Apr 2022 18:02:13 +0000

Any tips on how to split the DNS as well? I’d like to use my Pi-hole for everything except the traffic directed to the VPN.

If I add the IP address for the Pi-hole to the DNS settings for the VPN it works when I’m at home. But when I’m away from home it will fail.

By: Wayne

Wayne — Wed, 13 Apr 2022 17:57:24 +0000

In reply to Kalpesh.

You can create a script named /etc/ppp/ip-up that will run whenever the VPN is connected. The $1 is the name of the VPN interface (typically ppp0), which is passed as an argument by MacOS when the script is triggered.

#!/bin/bash
/sbin/route add -net [destination] -interface $1

Then run the following command to give it the correct permissions:

sudo chown root /etc/ppp/ip-up && sudo chmod 755 /etc/ppp/ip-up

By: Kalpesh

Kalpesh — Mon, 17 Jan 2022 11:11:10 +0000

Thanks for this . One thing: -p doesn’t work. Any other tips? Only other info I can find is to add static routes via the networksetup command but it appears that you have to specify a default gateway IP address. I can just see ppp0!