Zerotier routing works, until company VPN is started

[mdijk20]

Hi all,

I’m quite new to the community, and, using ZEROTIER.

I’m implementing this as a solution to access certain lab environments from my office. And, it works great, just, sometimes a little bit slow, but I guess maybe this has to do with the resources on my VM, and internet connection from the office. Overall, works well.

I setup masquerade, and, that also works, routing goes perfect, almost no dropped pings.

But… When I start my company their VPN software (F5 Networks), it just deletes all my routes to the internal networks, and only allows ZEROTIER IP/Subnet to work.

How can I prevent this? Does anyone have an idea. I tried adding a static route to the routing table in windows, but this did not solve anything.

So, here is a view of how the routing table looks when working and not working after initiating the VPN:

Is there anything I could do, to prevent this from happening? Or what am I missing.

Why are the routes removed, even though, you can see the ZEROTIER ip addresses are still present: 10.147.19.0/24

And, none of the IP ranges from my company, are in conflict with the range that I have set ZT to.

Any help is very much appreciated.

BR,
Mike

List item

[mdijk20]

Hi everone,

Has no one received this same occurence, where routes are removed when introducing another VPN connection?

Would hope to find an answer to this.

Many thanks,
Michael

[zt-grant]

Sounds like its some sort of policy that your company’s VPN is enforcing.

[mdijk20]

@zt-grant,

I’m thinking of the same, unfortunately. But, is there any way, I could mitigate this? I thought adding static routes, but that won’t work either.

Mike

[zt-grant]

Not that I know of. You might have to ask your company’s IT department for assistance with the issue.

[willc]

Sounds very much like they aren’t using split tunnelling and instead are sending all traffic via the F5 VPN instead.