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Install OVPN on pfSense

This guide is written for pfSense version 2.5.2

1. Change DNS servers

Navigate to SystemGeneral Setup.

Change the DNS servers in the list to:


Deselect, so that Allow DNS server list to be overridden by DHCP/PPP on WAN is not checked

Under DNS Resolution Behavior, select Use remote DNS servers, ignore local DNS.

Save the changes.

2. Create CA certificate

Navigate to SystemCert manager.

Click on +Add. Afterwards, alter these settings:

Create/Edit CA

Descriptive name OVPN
Method Import an existing Certificate Authority
Trust Store Unchecked
Randomize Serial Unchecked

Existing Certificate Authority

Certificate data You must be logged in to see this.
Certificate Private Key (optional) (leave blank)
Next Certificate Serial (leave blank)

Save the changes.

3. Choose how you want to connect to OVPN

4. Configure OpenVPN

Navigate to VPNOpenVPN. Afterwards click on tab Clients.

Click on +Add. Afterwards, alter these settings

General Information

Disabled Should not be selected
Server Mode Peer To Peer (SSL/TLS)
Device Mode Tun – Layer 3 Tunnel Mode
Interface WAN
Local port (leave blank)
Server host or address
Server port
Proxy host or address (leave blank)
Proxy port (leave blank)
Proxy authentication extra options none
Description OVPN client

User Authentication Settings

Username (enter your username for OVPN)
Password (enter your password for OVPN)
Authentication Retry Should not be selected

Cryptographic Settings

TLS Configuration Should be selected
Automatically generate a a TLS Key Should not be selected
Paste your shared key here -----BEGIN OpenVPN Static key V1-----
-----END OpenVPN Static key V1-----
TLS Key Usage Mode TLS Authentication
TLS Key Direction Direction 1
Peer Certificate Authority OVPN
Peer Certificate Revocation List Leave as is
Client Certificate None (Username and/or Password required)
Data Encryption Negotiation Should be selected
Encryption algorithms CHACHA20-POLY1305
Fallback Data Encryption Algorithm AES-256-GCM
Auth Digest Algorithm SHA1 (160-bit)
Hardware Crypto No Hardware Crypto Acceleration

Tunnel Settings

IPv4 Tunnel Network (leave blank)
IPv6 Tunnel Network (leave blank)
IPv4 Remote Network(s) (leave blank)
IPv6 Remote Network(s) (leave blank)
Limit outgoing bandwidth (leave blank)
Allow Compression Compress packets
Compression Adaptive LZO Compression [Legacy style, comp-lzo adaptive]
Topology Subnet – One IP-address per client in a common subnet
Type-of-Service Should not be selected
Don't pull routes Should not be selected
Don't add/remove routes Should not be selected
Pull DNS Should be selected

Ping settings

Advanced configuration

Inactive 0
Ping method ping -- Define ping/ping-exit/ping-restart manually
Ping 10
Ping restart or exit ping-restart --Restart OpenVPN after timeout
Ping restart or exit seconds 60
Custom options You must be logged in to see this.
UDP fast I/O Should be selected
Exit Notify Retry 1x
Send/Receive buffer Default
Gateway Creation Both
Verbosity level 3 (Recommended)

Save the changes.

5. Create OpenVPN interface

Navigate to InterfacesAssignments.

Click on the plus (+) icon to create interface ovpnc1 (OVPN client). Afterwards, click on OPT1.

Select, so that Enable interface is checked.

Save your changes and click on Apply changes.

6. Configure NAT

Navigate to FirewallNAT. Afterwards click on tab Outbound

Select, so that Manual Outbound NAT rule generation (AON - Advanced Outbound NAT) is checked. Save your changes and click on Apply changes.

The next step is to duplicate all existing rules, but changing the interface to OpenVPN. To duplicate a rule, click on the duplicate icon (the middle icon) next to the rule

Change Interface to OpenVPN. You should also alter the Description in order to clarify that the rule is for OpenVPN. Save your changes.

When all the rules have been duplicated, commit your changes by clicking on Apply changes.

7. Start OpenVPN

Navigate to StatusOpenVPN

Click on the icon that looks like a Play button in order to start OpenVPN. If OpenVPN is already running, we suggest restarting it.

8. Finished

You should now be connected to OVPN and be able to browse the internet safely. To make sure everything was set up correctly, please check the dashboard to verify that you are connected.