We’ve been using a Peplink Balance 20 with a single WAN connection for the past year. 5 weeks ago we added a wireless modem for backup
The Primary WAN is Time-Warner Roadrunner cable with a static IP. Time-Warner replaced the cable modem a couple of months ago.
Our local client software uses an SQL OBDC connection with our hosted business software (running on a dedicated server in a local data center). If we lose connectivity, it causes the software to glitch and we have to close and reopen the software far too frequently (we are looking at Citrix XenApp to eliminate this issue).
Over the past 2-3 weeks, we’ve been experiencing sporadic ‘WAN failed DNS test’ drops on our Primary WAN connection (Roadrunner cable). I’ve tried all the usual powering down and restarting of the cable modem and router.
According to Time-Warner they are not showing any issues with our connection to them, and they have not received any reports of issues with their DNS servers.
Initially I suspected the wireless modem. But after trying numerous settings - and most recently disabling the wireless, it appears the issue is elsewhere.
I’ve tried using different DNS servers, but I get similar results.
I have tried changing the Health Check parameters:
Timeout from 5 to 10 seconds and back to 5 seconds
Health Check Interval to 20 seconds
Health Retries to 5
I have also checked the Include Public DNS Servers box
Today I downloaded the latest firmware:
5.4.1 build 1439
I’m still getting the same issue…
Here is a sample of the error messages (I’ve edited the IP address). The timing is nearly always the same - the connection drops, then 60 seconds later it’s fine.
Jul 8 20:03:48 WAN: Mobile Internet standby
Jul 8 20:03:48 WAN: RoadRunner connected (24.213.xxx.xxx)
Jul 8 20:02:59 WAN: Mobile Internet connected to Verizon Wireless (10.182.xxx.xxx)
Jul 8 20:02:59 WAN: RoadRunner disconnected (WAN failed DNS test)
Most recently I started testing from home coming in through the router via RDP - and clearly the connection is dropping periodically as several times the connection has dropped or I could not get in - then when I check the log it shows a corresponding outage.
At this point I suspect the cable modem or the time warner service - but could this be an issue within the Router?
We have Time Warner due tomorrow to run more diagnostics - but if they don’t find anything, I’d appreciate any thoughts or suggestions on where the problem may be hiding.
Related to this, how can I configure the wireless modem to stay permanently connected, but not used unless the Primary WAN drops?** Because of the 3G performance, I don’t want any traffic using the wireless modem unless absolutely necessary.