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<h1>Introduction</h1>
<h1>Introduction</h1>
In this example, we will configure an OpenVPN server, will let Client1 and Client2 communicate, while isolating Client3 to only be able to communicate with OpenVPN server
In this example, we will configure an OpenVPN server, will let Client1 and Client2 communicate, while isolating Client3 only to be able to communicate with OpenVPN server
<h1>Generating certificates for an OpenVPN server</h1>
<h1>Generating certificates for an OpenVPN server</h1>
1)Navigate to System -> Administration -> Certificates
1)Navigate to '''System -> Administration -> Certificates'''
2)Generate 2 certificates with a keysize 1024:
2)Generate 2 certificates . Recommended key size is at least 2048 bits for security reasons:
2.1) CA
2.1) CA
3) In Certificate Manager download Server certificate
3) In Certificate Manager download Server certificate
There are multiple methods of how certificates could be generated, you could follow this tutorial instead:
[[How to generate TLS certificates (Windows)?]]
[[File:Certificate download v2.png|none|thumb|alt=|1000x1000px]]
[[File:Certificate download v2.png|none|thumb|alt=|1000x1000px]]
1) Connect to WebUI and enable Advanced mode
1) Connect to WebUI and enable Advanced mode
[[File:Advanced mode toggle v2.png|none|thumb|alt=|1000x1000px]]
[[File:Networking rutos manual webui basic advanced mode 75.gif|none|thumb|alt=|1000x1000px]]
2) Navigate to Services -> VPN -> OpenVPN
2) Navigate to '''Services -> VPN -> OpenVPN'''
3) Add a new OpenVPN instance with a Server role
3) Add a new OpenVPN instance with a Server role
[[File:OpenVPN server settings v2.png|none|thumb|alt=|1000x1000px]]
[[File:OpenVPN server settings v2.png|none|thumb|alt=|1000x1000px]]
Virtual network IP address – 10.0.0.0
<ul>
<li>Virtual network IP address – 10.0.0.0</li>
<li>Virtual network netmask – 255.255.255.224</li>
<li>Client to client – disabled</li>
<li>Certificate files from device - on</li>
</ul>
5) Press '''"Save & Apply"''', enable OpenVPN server and check if the server is online
5) Press "Save & Apply", enable OpenVPN server and check if the server is online
[[File:OpenVPN server is online v2.png|none|thumb|alt=|1000x1000px]]
[[File:OpenVPN server is online v2.png|none|thumb|alt=|1000x1000px]]
<h1>Connecting clients to the OpenVPN server</h1>
<h1>Connecting clients to the OpenVPN server</h1>
1) Navigate to Services -> VPN -> OpenVPN
1) Navigate to '''Services -> VPN -> OpenVPN'''
2) Add a new OpenVPN instance with a Client role
2) Add a new OpenVPN instance with a Client role
3) Create an OpenVPN client with these settings
3) Create an OpenVPN client with these settings
[[File:OpenVPN Client1.png|none|thumb|alt=|1000x1000px]]
[[File:OpenVPN Client1 v2.png|none|thumb|alt=|1000x1000px]]
<ul>
<li>Remote host/IP address - Public IP of the OpenVPN server's router</li>
<li>Remote network IP address - 10.0.0.0</li>
<li>Remote network netmask - 255.255.255.224</li>
<li>And add the certificates from the OpenVPN server - Certificate Authority, Client certificate, and Client key which we downloaded in the Certificate Generation step</li>
</ul>
4) Press "Save & Apply", enable OpenVPN client and check if the connection is made
4) Press "Save & Apply", enable OpenVPN client and check if the connection is made
[[File:OpenVPN Client1 connected.png|none|thumb|alt=|1000x1000px]]
[[File:OpenVPN Client1 connected v2.png|none|thumb|alt=|1000x1000px]]
5) Repeat this step for as many clients as You need. For this example, we will have 3 clients
5) Repeat this step for as many clients as You need. For this example, we will have 3 clients
<h1>Client to Client LAN network communication</h1>
<h1>Client to Client LAN network communication</h1>
1) On the OpenVPN server router, navigate to Services -> VPN -> OpenVPN, Press "Edit" on the server, scroll down and add TLS clients
1) On the OpenVPN server router, navigate to '''Services -> VPN -> OpenVPN''', Press "'''Edit'''" on the server, scroll down and add TLS clients
Add clients which LAN address You want to have access to, in our case, we add all 3 clients
Add clients which LAN address You want to have access to, in our case, we add all 3 clients
[[File:TLS Client 1.png||none|thumb|alt=|1000x1000px]]
<ul>
<li>Common name - common name of the certificate which was generated previously</li>
<li>Virtual local endpoint - client’s local address in the virtual network</li>
<li>Virtual remote endpoint - client’s remote address in the virtual network</li>
<li>Private network - client's LAN subnet</li>
<li>Covered network - Which LAN subnet should clients be able to communicate with in the OpenVPN server</li>
</ul>
This step should be done on OpenVPN server and all clients that want their LAN subnets be accessible and to access other client's LAN subnets
1) Navigate to '''Network -> Firewall -> General settings -> Zones''' and set OpenVPN zone to forward traffic to LAN
[[File:OpenVPN to LAN zone forward.png|none|thumb|alt=|1000x1000px]]
This step should be done on all <b>clients</b> that want their LAN subnets be accessible and to access other client's LAN subnets
Create a route to other client LAN networks using WebUI. This step should be done on all <b>clients</b> that want their LAN subnets be accessible and to access other client's LAN subnets
1) Create a route to other client LAN networks using WebUI or CLI. To create route from client 1's LAN to client 2's LAN using CLI use this command
1) Navigate to '''Services -> VPN -> OpenVPN''' press '''"Edit"''' on the OpenVPN client and add routes to other client LAN subnets. In this image, we are editing Client 1's configuration, to add routes to Client 2's (192.168.20.0/24) and Client 3's (192.168.30.0/24) LAN subnets.
[[File:OpenVPN client routes.png|none|thumb|alt=|1000x1000px]]
<h1>Controlling access with firewall</h1>
<h1>Controlling access with firewall</h1>
1) Navigate to Network -> Firewall -> Access Control
1) Navigate to '''Network -> Firewall -> Access Control'''
2) Create a new deny rule. In this example, we are denying Client 3 from accessing any other clients and their LAN networks
2) Create a new deny rule. In this example, we are denying Client 3 from accessing any other clients and their LAN networks
Source interface - OpenVPN
[[File:Deny Client3 rule.png|none|thumb|alt=|1000x1000px]]
<ul>
<li>Source interface - OpenVPN</li>
<li>Destination interface - OpenVPN</li>
<li>Source IP - OpenVPN remote IP and LAN subnet of client 3</li>
<li>Destination IP - other client OpenVPN remote endpoints and LAN subnets</li>
<li>Action - Deny</li>
</ul>
This rule will deny all traffic from Client 3 to other clients, but will not interact with traffic, if it's destination is OpenVPN server or it's LAN subnet
<h1>See also</h1>
<ul>
<li>[[OpenVPN_configuration_examples_RUT_R_00.07]]</li>
<li>[[How to generate TLS certificates (Windows)?]]</li>
<li>[[OpenVPN client on Windows]]</li>
<li>[[OpenVPN client on Linux]]</li>
<li>[[OpenVPN server on Windows]]</li>
<li>[[OpenVPN traffic split]]</li>
<li>[[Configuration file .ovpn upload tutorial]]</li>
</ul>
<h1>External links</h1>
https://openvpn.net/index.php/open-source/documentation/howto.html - some additional information on OpenVPNs
