User`s manual

User’s Manual
Arctic GPRS Router 24 Viola Systems Ltd.
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.
Routing
Routing mode – Routing mode has three modes:
1."Tunnel the following network" Æ This adds the “Remote network IP” to be reached
via the SSH-VPN. Parameters “Remote network IP” and “Remote network mask” must
be set.
2. "Default route" Æ VPN interface is used as default route.
3. “None” Æ No routing is added when the VPN is established. The VPN peer IPs can
be used for communications.
Remote network IP - Remote network IP behind the VPN (on Viola M2M Gateway
side) what is needed to reached by Arctic.
Remote network mask – Netmask for remote network IP.
Link management
MTU - MTU for SSH-VPN interface.
Idle timeout (sec) – Idle timeout for SSH-VPN interface. If idle timeout is reached, the
VPN connection is restarted.