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1.3) Create another certificate by clicking on the "+” icon.
1.4) Store the following parameters in order to create a VPN certificate, which is used to authenticate VPN clients at the Unified Firewall:
- Certificate type: From the drop-down menu, select VPN certificate.
- Signing CA: From the drop-down menu, select the CA created in step 1.2.
- Public key encryption: From the drop-down menu, select RSA.
- Private key size: Set the value in the drop-down menu to 4096.
- Common Name (CN): Enter a descriptive common name.
- Validity: Specify how long the certificate should remain valid. For a VPN certificate used to accept VPN clients, the period of validity is usually set to be very high.
- CA password: Enter the private key password set in step 1.2.
- Private key password: Set a password. This is used to encrypt the private key.
1.5) Create another certificate by clicking on the "+” icon.
1.6) Store the following parameters in order to create a VPN certificate, which is used to authenticate a particular employee or VPN client:
- Certificate type: From the drop-down menu, select VPN certificate.
- Signing CA: From the drop-down menu, select the CA created in step 1.2.
- Public key encryption: From the drop-down menu, select RSA.
- Private key size: Set the value in the drop-down menu to 4096.
- Common Name (CN): Enter a descriptive common name that characterizes the employees.
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| The field Subject Alternative Name can be used for the easier identification of each employee, such as be entering their e-mail address. |
- Validity: Specify how long the certificate should remain valid. With VPN certificates for individual users, the period of validity is usually set quite low.
- CA password: Enter the private key password set in step 1.2.
- Private key password: Set a password. This is used to encrypt the private key.
1.7) Switch to the menu VPN → VPN SSL → VPN SSL Settings.
1.8) Enable the VPN SSL service and enter the following parameters:
- Host certificate: From the drop-down menu, select the VPN certificate created in step 1.4
- DNS: Enter a DNS server, if required.
- Routes: The networks that the VPN client should communicate with should be entered in CIDR notation (Classless Inter-Domain Routing). These are shared with all of the VPN SSL clients.
- Encryption algorithm: From the drop-down menu, select AES256.
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| If necessary, you can change the protocol and the port. |
The address pool is the range of IP addresses that are assigned to the dial-in VPN SSL clients. This address range may not already be in use as an internal network in the Unified Firewall.
1.9) Change to the menu VPN → VPN SSL → VPN SSL Connections and click on the “+” icon to create a new VPN SSL connection.
1.10) Enable the VPN connection and enter the following parameters:
- Name: Enter a descriptive name.
- Certificate: From the drop-down menu, select the VPN certificate for the employees created in step 1.6.
- Connection type: Choose Client-to-Site.
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With the function Set standard gateway activated, the VPN client can communicate with the Internet via the Internet connection of the Unified Firewall. The item Client IP allows a fixed IP address to be assigned to the VPN client. If this entry is left empty, the VPN client is given an IP address from the address pool (see step 1.8). Additional server networks optionally allows the VPN client to access other local networks. In this way, individual employees can be given access to different local networks. |
1.11) Edit the VPN SSL connection created in step 1.10 by clicking on the “pencil” icon.
1.12) Click Export client configuration to export the VPN profile together with the certificate.
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As of LCOS FX 10.5 you can export the profile directly in the menu VPN → VPN SSL → Connections by clicking on the option Export this connection for a specific connection. It is possible that you have to click on the double arrow symbol first (right next to the field Filter) to expand the menu, so that the symbol for the profile export is visible.
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1.13) Enter the following parameters and then click on Export.
- Type: Select OVPN to generate a profile for the OpenVPN client.
- Remote Hosts: Enter the public IPv4 address or the DynDNS name of the Unified Firewall along with the VPN SSL port (see step 1.8).
- Key Password: Enter the private key password set in step 1.6.
- Transport Password: Set a password. This has to be entered when the user starts the VPN connection with the OpenVPN client.
1.14) Click the button to create a new VPN host.
1.15) Save the following parameters:
- Name: Enter a descriptive name.
- VPN connection type: Select VPN-SSL.
- VPN SSL connection: From the drop-down menu, select the VPN SSL connection created in step 1.10
1.16) In the VPN host click on the "connection" icon and, to open the firewall objects, click on the network object that the OpenVPN client should access.
Repeat this step for every network that the OpenVPN client should be able to access.
1.17) Use the “+” sign to assign the required protocols to the VPN host.
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| A Unified Firewall uses a deny-all strategy. You therefore have to explicitly allow communication. |
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| Firewall objects can also be accessed via Desktop→ Desktop connections and clicking on the “pencil” icon for editing. |
1.18) Finally, implement the configuration changes by clicking Activate in the Unified Firewall.
1.19) This concludes the configuration steps on the Unified Firewall.
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