OpenVPN Access Control: Difference between revisions
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<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 with a keysize 1024: | ||
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[[File:Advanced mode toggle v2.png|none|thumb|alt=|1000x1000px]] | [[File:Advanced mode toggle v2.png|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 | ||
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Certificate files from device - on | Certificate files from device - on | ||
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]] | ||
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<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 | ||
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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]] | ||
Remote host/IP address - Public IP of the OpenVPN server's router | Remote host/IP address - Public IP of the OpenVPN server's router | ||
Remote network IP address - 10.0.0.0 | Remote network IP address - 10.0.0.0 | ||
Remote network netmask - 255.255.255. | Remote network netmask - 255.255.255.224 | ||
And add the certificates from the OpenVPN server - Certificate Authority, Client certificate and Client key which we downloaded in Certificate Generation step | And add the certificates from the OpenVPN server - Certificate Authority, Client certificate, and Client key which we downloaded in the Certificate Generation step | ||
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 | ||
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Common name - common name of the certificate which was generated previously | Common name - common name of the certificate which was generated previously | ||
Virtual local endpoint - client’s local address in the virtual network | |||
Virtual remote endpoint - client’s remote address in the virtual network | Virtual local endpoint - client’s local address in the virtual network | ||
Virtual remote endpoint - client’s remote address in the virtual network | |||
Private network - client's LAN subnet | Private network - client's LAN subnet | ||
Covered network - Which LAN subnet should clients be able to communicate with in the OpenVPN server | Covered network - Which LAN subnet should clients be able to communicate with in the OpenVPN server | ||
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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 | 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 | 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 | 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) 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 | ||
ip route add 192.168.20.0/24 via 10.0.0.6 | ip route add 192.168.20.0/24 via 10.0.0.6 | ||
<h1>Controlling access with firewall</h1> | <h1>Controlling access with firewall</h1> | ||
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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 | ||
[[File:Deny Client3 rule.png|none|thumb|alt=|1000x1000px]] | |||
Source interface - OpenVPN | Source interface - OpenVPN | ||
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Destination IP - other client OpenVPN remote endpoints and LAN subnets | Destination IP - other client OpenVPN remote endpoints and LAN subnets | ||
Action - Deny | |||
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 | 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 | ||
Revision as of 08:19, 28 March 2024
Introduction
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
Generating certificates for an OpenVPN server
1)Navigate to System -> Administration -> Certificates
2)Generate 2 certificates with a keysize 1024:
2.1) CA
2.2) Server
3) In Certificate Manager download Server certificate
For any OpenVPN clients, You will need to generate “Client” certificates, download certificate and key, and send them to the client
Creating an OpenVPN server
1) Connect to WebUI and enable Advanced mode
2) Navigate to Services -> VPN -> OpenVPN
3) Add a new OpenVPN instance with a Server role
4) Create an OpenVPN server with these settings
Virtual network IP address – 10.0.0.0
Virtual network netmask – 255.255.255.224
Client to client – disabled
Certificate files from device - on
5) Press "Save & Apply", enable OpenVPN server and check if the server is online
Connecting clients to the OpenVPN server
1) Navigate to Services -> VPN -> OpenVPN
2) Add a new OpenVPN instance with a Client role
3) Create an OpenVPN client with these settings
Remote host/IP address - Public IP of the OpenVPN server's router
Remote network IP address - 10.0.0.0
Remote network netmask - 255.255.255.224
And add the certificates from the OpenVPN server - Certificate Authority, Client certificate, and Client key which we downloaded in the Certificate Generation step
4) Press "Save & Apply", enable OpenVPN client and check if the connection is made
5) Repeat this step for as many clients as You need. For this example, we will have 3 clients
Client to Client LAN network communication
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
Common name - common name of the certificate which was generated previously
Virtual local endpoint - client’s local address in the virtual network
Virtual remote endpoint - client’s remote address in the virtual network
Private network - client's LAN subnet
Covered network - Which LAN subnet should clients be able to communicate with in the OpenVPN server
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
This step should be done on all clients 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
ip route add 192.168.20.0/24 via 10.0.0.6
Controlling access with firewall
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
Source interface - OpenVPN
Destination interface - OpenVPN
Source IP - OpenVPN remote IP and LAN subnet of client 3
Destination IP - other client OpenVPN remote endpoints and LAN subnets
Action - Deny
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