![Viola Systems Arctic Скачать руководство пользователя страница 30](http://html.mh-extra.com/html/viola-systems/arctic/arctic_user-manual_1028844030.webp)
User's Manual
Arctic GPRS Gateway
Firmware Version 5.0.7
30
Document Version 1.6
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" - 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" -> VPN interface is used as default route.
3. “None” -> 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.
5.2.5
L2TP-VPN
Arctic has a L2TP client that can be used with L2TP server.