SSL Site to Site VPN is down

Question

Hello, 
 i have configured SSL site to site VPN, at the beginning it worked well, but since this morning, they no longer work on the server side, the green connection circle has changed to red i have deleted the server and reconfigured the server but is still disconnected. 
 i have the latest firmware version, two XG210 appliance, a fixed public IP adresse on both sides (client and server) 
 what are the possible settings that can cause the VPN tunnel to malfunction. 
 
 thanks,

Idir AIT YAHIA · Answer

Hi 
 thank's for reply, problem solved, I think the problem comes from there, but I'm not very sure, because I did a lot of manipulation.

S023A · Answer

Check "Override Hostname" under Show VPN Settings 
 When Override Hostname is blank it will automatically use all WAN as an authentication way. 
 Putting distinct WAN IP address in Override Hostname will assure you that there will be no WAN port be used except to what you have entered. 
 I recommend you to put a reliable WAN connection to SSL VPN Override Hostname be because if that port is down SSL VPN connection cannot authenticate anymore. 
 Or what we have tried is we put a WAN load balance (with multiple WAN connection) to portX to assure that it will not go down. 
 Hope this help you!