Connecting to two different OpenVPN servers at the same time

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Juan

Posts: 1
Joined: Fri Mar 30, 2018 5:32 am

Post by Juan » Fri Mar 30, 2018 6:28 am
Hello,

I am not a guru on networking neither VPNs but I am facing the following issue:

I have TWO VPNs. Each one allows me to ssh a series of servers and connect to a DB server. I want to be connected to both so I can easily do my work.

Server 1:
ssh: 192.170.20.*
DB: server1.rds.amazonaws.com

Server 2:
ssh: 192.120.15.*
DB: server2.rds.amazonaws.com

When I connect, I can reach only the server for the first connection made, so I know everything is going there, even when I set each VPN connection like:

Connection 1:
DNS Settings: Split DNS
Servers: 192.170.20.0/1, server1.rds.amazonaws.com

and

Connection 2:
DNS Settings: Split DNS
Servers: 192.120.15.0/1, server2.rds.amazonaws.com

Please don't laugh too much about my question.... :) and your time and help is greatly appreciated.

Regards,
Juan Luna

James

User avatar
Posts: 1898
Joined: Thu Sep 04, 2008 9:27 pm

Post by James » Tue Apr 03, 2018 2:31 pm
Hi Juan,

It sounds likely both are either set to route all traffic through them, or they're both using the same IP ranges for the VPN subnet, so it results in a route clash.

You should make sure that both servers are using a different IP range internally (e.g. not both on 10.8.0.x etc.), and that they're only pushing out the routes needed to access the subnets your SSH server/s are on (i.e. don't push redirect-gateway if not needed).

Cheers,
James
James Bekkema
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