I have the following situation: Server side: Router : 192.168.1.1 Synology NAS: 192.168.1.220 (acts as Open VPN Server; so no possibility to "push" routes) File server (fixed IP): 192.168.1.10 Client side: Router: 192.168.1.1 File server (also fixed IP): 192.168.1.10 Client & server: unable to change the subnet due to modem provided by internet providor :| I created an OPEN-VPN connection and the connection works. On the client side, I can ping computers from the server side where the IP-addess is not available on the client side, but I had to reach the fileserver (server side). So I added the following line to the OVPN-configuration file: route 192.168.1.10 255.255.255.255 Now I am able to "view" the file server from the server side, but I'm unable to view the files server from the client side. Question: Is there a possibility to change the ip-address from the file server (server side) through the configuration file in for example 192.168.1.190. In this case I can reach the file server from the server side on IP 192.168.1.190 and I can reach the file server form the client side on IP 192.168.1.10. Any help is appreciated!!! Kind regards, Jurgen

If you put a router between a modem and the devices, you can solve it. Modem Router Devices You cannot get around changing one of the subnets.

Change IP-address from 1 computer on server side

jurgenlemmens

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Pippin

To reach the LAN behind the NAS:
1. tick "Allow clients to access server LAN" in OpenVPN on your NAS.
2. Add a Allow All rule on the VPN interface.

jurgenlemmens

Thnx for your reply Pippin,

But I already allowed clients to access server lan (marked on my NAS).

The question is: After the VPN is created, I have 2 computers with the same IP address on my network, and I want to change the IP-address of the external computer to an other IP-address…

grtz,

Jurgen

Pippin

You have to change client and/or server side LAN subnet.
Probably the router at both sides serve DHCP, so change it in the router.

And you can remove:

route 192.168.1.10 255.255.255.255

jurgenlemmens

Hi Pippin,

that's the problem. Normally I change one of the subnets and I don't have this problem. But in this case I cannot change the subnets because there are a lot of equipement with fixed IP's configured that cannot be changed (or cost a lot of money)...

Pippin

Can you add a router on one of the two sides?
Make a double NAT...

jurgenlemmens

Could you provide me some info about this double nat about the hardware setup?

thnx

Pippin

If you put a router between a modem and the devices, you can solve it.

<WAN> Modem <192.168.1.0/24> Router <192.168.15.0/24> Devices
You cannot get around changing one of the subnets.

jurgenlemmens

OK, thnx for the info!!!!