I've got our XG firewall set up for 3 WAN connections as we are in quite a rural area and internet connectivity can be spotty.
I have the primary connection, which is a wireless system up to 100mbit up and down.
I have a secondary connection which is on a a 4G router, 20mbit and a limited data plan.
I have a third ADSL connection which is almost exclusively for the VOIP phones as it is the most reliable connection but only 1.5mbit on a good day.
With any firewall that we've had (sonicwall and sophos) they always struggle during inclement weather where the connection is "available" but with extreme packet loss and instability - this is the last 24 hours for our primary connection due to high winds, and yet the firewall still marks this as "available":
I need a strategy where I can get the failover to happen but only allow it to return to the primary when more complex criteria are satisfied, maybe a successful run of pings to wherever (8.8.8.8 at the moment) where i have a less than 2% loss over a 5 minute period. Something like that anyway. It spends too much time bouncing back and forth between primary and secondary at the moment to the point where nothing works at all.
I understand this probably isn't exactly a common situation, but I'm looking for suggestions on how I can make this setup more reliable. Thanks.
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