User Manual

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You can set custom settings here according to your VPN needs. Below is summary of parameters available to set:
Field name
Explanation
1.
Enabled
Switches configuration on and off. This must be selected to make configuration active.
2.
TUN/TAP
Selects virtual VPN interface type. TUN is most often used in typical IP-level VPN connections,
however, TAP is required to some Ethernet bridging configurations.
3.
Protocol
Defines a transport protocol used by connection. You can choose here between TCP and UDP.
4.
Port
Defines TCP or UDP port number (make sure, that this port allowed by firewall).
5.
LZO
This setting enables LZO compression. With LZO compression, your VPN connection will
generate less network traffic; however, this means higher router CPU loads. Use it carefully with
high rate traffic or low CPU resources.
6.
Encryption
Selects Packet encryption algorithm.
7.
Authentication
Sets authentication mode, used to secure data sessions. Two possibilities you have here: “Static
key” means, that OpenVPN client and server will use the same secret key, which must be
uploaded to the router using “Static pre-shared key” option. “TLS” authentication mode uses
X.509 type certificates. Depending on your selected OpenVPN mode (client or server) you have
to upload these certificates to the router:
For client: Certificate Authority (CA), Client certificate, Client key.
For server: Certificate Authority (CA), Server certificate, Server key and Diffie-Hellman (DH)
certificate used to key exchange through unsafe data networks.
All mention certificates can be generated using OpenVPN or Open SSL utilities on any type host
machine. Certificate generation and theory is out of scope of this user manual.
8.
TLS cipher
Packet encryption algorithm (cipher)
9.
Remote host/IP
address
IP address of OpenVPN server (applicable only for client configuration).
10.
Resolve Retry
Sets time in seconds to try resolving server hostname periodically in case of first resolve failure
before generating service exception.
11.
Keep alive
Defines two time intervals: one is used to periodically send ICMP request to OpenVPN server,
and another one defines a time window, which is used to restart OpenVPN service, if no ICPM
request is received during the window time slice. Example Keep Alive “10 60”
12.
Remote network
IP address
IP address of remote network, an actual LAN network behind another VPN endpoint.
13.
Remote network
IP netmask
Subnet mask of remote network, an actual LAN network behind another VPN endpoint.
14.
Max routes
Allow a maximum number of routes to be pulled from an OpenVPN server
15.
HMAC
authentication
algorithm
Sets HMAC authentication algorithm
16.
Additional
HMAC
authentication
Add an additional layer of HMAC authentication on top of the TLS control channel to protect
against DoS attacks
17.
Certificate
authority
Certificate authority is an entity that issues digital certificates. A digital certificate certifies the
ownership of a public key by the named subject of the certificate.