How to configure Failover IP (of OVH or Online.net) on your XPENOLOGY - Synology System
These systems tent to give you an Public IP in the range of (for example) 212.x.x.x BUT want you to givein an Gateway of 66.x.x.x
The standard Synology DSM interface does not alow this
Login with root (has same password as admin account) on your Synology NAS (based on XPENOLOGY)
cd /etc/
vi rc.local
<Press insert button to go to insert/modify mode)
#!/bin/sh
ip route delete default
ip route add <gateway IP> dev eth0
ip route add default via <gateway IP> dev eth0
<Press Escape to exit insert/modify mode)
:w
:q
reboot
You can use these generic commands to check your Routing Table
ip route
or
route -e