I just installed a new Balance One router yesterday. Today my monitoring system notified me that it went offline at 5:00am (which meant I had to get up and make an early one-hour drive to reset it).
After checking the event log, I discovered the following:
[TABLE=“class: stat_table, width: 744”]
[TR=“class: zb2”]
Nov 26 04:55:59
WAN: WAN 1 disconnected (WAN failed DNS test)
[/TR]
[/TABLE]
Apparently, it was unable to ping the DNS server and took itself offline.
Since I only have one WAN connection, there was no way to failover to WAN2. It remained offline until I reset it.
WAN1 is configured with a static IP and WAN2 is disabled.
I disabled the health check to avoid this problem in the future. However, this does not seem like the most intelligent default response to a failed health check on a single-WAN system. This means that a temporary network glitch will cause the router to go offline.
Is there a good reason for this kind of behavior or is it a bug?
The health check mechanism is constantly running in the background, even after a failed status. Once the health check passes again the WAN connection will come back up automatically.
In a single-WAN environment the health check is not even needed but could be used to monitor how good your connection really is performing. I would suggest to use a different health check method or use different DNS servers like public Google 8.8.8.8 & 8.8.4.4
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