User`s manual

User's Manual
Arctic IEC-104 Gateway
Firmware Version 5.0.9 29 Document Version 1.5
Figure 19. SSH-VPN Settings
Primary server
Use SSH-VPN? – When set to "Yes" Arctic automatically establishes SSH-
VPN connection to primary Viola M2M Gateway.
Primary interface – Interface used to reach the Viola M2M Gateway server.
Primary server IP – IP address of Viola M2M Gateway SSH-VPN server.
Primary server port – SSH-VPN TCP port on primary server (default 22).
Primary server GW – If other gateway than default route is needed to reach
the Viola M2M Gateway.
Max duration (0=unlimited) – Maximum duration of the VPN connection. On
primary server, should be set to zero. With backup server, after this timeout,
the primary server is tried again.
Connection start timeout (sec) – Time to wait for the connection
establishment.
Connection retry interval (sec) – How often retry the connection.
Connection retry mode – incremental increases the retry inteval on each
connection attempt. Constant delay uses the same delay always.
Hello interval (sec) – Hello packet interval for the VPN. This can be used as
a keepalive message on very critical links.
Hello failure limit – How many hello-packets can be lost before restarting the
connection.
Backup server (optional)
Use backup SSH-VPN? – When set to “Yes”, Arctic will try to establish VPN
connection to backup Viola M2M Gateway, if the primary cannot be reached.
Primary failure limit – How many times primary must not be reached, before
changing to secondary.
Other parameters are same as in primary server. The duration of the
connection can be set for example to 3600 seconds, so after one hour
connection time to backup server the secondary is tried to be reached.