![]() Access the Terminal on your machine and type the following command to install the app. Download 64 bit Debian (Linux or Ubuntu) from Fruho’s downloads page.Ģ. ![]() If you need to sign up for an account, please click here or at the JOIN NOW link at the top right of this page.ġ. For more information, read our guide on obtaining OpenVPN config files. Here we have used a machine running on Ubuntu 18.04 for demonstration.īefore proceeding to the details of configuring the OpenVPN setup, the first step is to download the OpenVPN configuration file from our Setup Instructions page. This guide will help you to set up StrongVPN on both of these GUI clients and stay protected. ![]() When using the dynamic firewall a network load balancer cannot be used.You can connect an OpenVPN server to a Linux machine via Linux GUI clients, such as Fruho and Pritunl. It is not recommended to ever configure Pritunl VPN servers behind a network load balancer as the client will already choose a server at random. This ensures the client will connect to the correct Pritunl VPN server when sending a request to multiple Pritunl web servers behind a load balancer. Additionally the Pritunl server will return the IP address of the Pritunl host that received the connection approval. Pritunl web servers are often run behind load balancers, by utilizing the Pritunl app servers even if the web request returns the load balancer IP address the server will still have the correct address. Three sources are used to determine the client IP address, the client provided IPv4 and IPv6 address discovered from the Pritunl app servers and the remote address of the incoming web request on the Pritunl server. Once the Pritunl server validates the connection approval request the server will open the VPN port for the requested server to the client IP addresses. This is the same certificate used to verify OpenVPN connections. The server will use this verify the client connection request. The clients RSA certificate and key is used to sign each connection request. This is the same authentication system used to provide the additional layer of encryption and authorization available in OpenVPN connections with passwords and two-factor codes.Ĭlient RSA-4096 Asymmetric Key (Authorization) The client will also verify the server response using the server NaCl public key. The server will encrypt the response with the clients NaCl public key providing encryption of the response. This provides asymmetric encryption of the connection request from the client to the server. The client utilizes a NaCl public key for the server that is included in the client profile. This is the same authentication system used to authorize the client configuration sync which syncs profile configuration changes such as host addresses and server port changes (private keys are never synced).Ĭlient/Server NaCl Asymmetric Key (Authorization + Encryption) The server will also use this secret to sign the response allowing the client to verify the connection response. The client will use a SHA512-HMAC secret to sign each connection request. Many administrators do not configure a valid HTTPS certificate and HTTPS is not relied on or required to provide secure authentication. The components of this are explained below. This connection approval request will utilize these keys to create three layers of authorization for the request. A Pritunl client profile includes multiple keys that allow for multiple layers of encryption. This server option can be used along side existing VPN servers on the same host to support other OpenVPN clients or to allow transitioning to the dynamic firewall from servers that do not have the feature enabled.įor a client to connect the Pritunl client will first authenticate with the Pritunl web server. When using the dynamic firewall only the Pritunl Client that is updated to a supported version will be able to connect. This design in combination with the high level of security provided from the dual web server can make a Pritunl server nearly impossible to attack from unauthenticated attackers. When configured the only port open to the internet on a Pritunl server will be the web server. ![]() The Pritunl server will block access to the port with iptables. When a server is run with the dynamic firewall enabled the VPN port will not be open to the internet. The dynamic firewall will provide the highest level of security available in Pritunl. ![]()
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