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2633 posts

Uber Geek

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# 198517 12-Jul-2016 11:53
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Troubleshooting something weird for a client...


Two temporary work sites are using a TP-Link Archer MR200 4G Router with a 2Degrees SIM card.  One laptop is normally connected via cable, plus a networked printer/scanner.


Client starts a VPN connection from within Windows 7 using the baked in WIndows VPN software to a Cyberoam VPN Firewall at the Head Office end.  At this point, for troubleshooting reasons, we start a constant ping to the internal web server (which runs a custom web application that has no security - hence the VPN being required to access it instead of it being available directly across the internet).  The ping responds fine.


If you then try to access the web application via FF or IE, the traffic across the VPN stops.  The ping stops, and the browser times out when trying to access the internal web server over the VPN.  Internet access is fine (as the 'use default gateway on remote network' is unticked ion the VPN properties).  Disconnect the VPN and try again...  same things happens.  Disconnect the VPN again, use Chrome, and it all works fine.  The ping keeps going, and the application works fine.


If the guy tethers the laptop to his iPhone, the VPN works fine and he can use any browser.


A case has been logged with TP-Link, but to be honest I'm not expecting much of a response.


Any ideas or suggestions would be appreciated.

"4 wheels move the body.  2 wheels move the soul."

“Don't believe anything you read on the net. Except this. Well, including this, I suppose.” Douglas Adams

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464 posts

Ultimate Geek

  # 1590278 12-Jul-2016 12:54
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That's an unusual situation. I can't see that it would affect it but have you checked/cleared the lan/proxy settings in the browser(s)?




If after starting the connection and the ping, you then open the browser you can surf anywhere you like until you open the web app over the VPN at which point you lose connectivity to the VPN? Does connectivity resume if you close the browser? Can you still surf the net after this issue?





BDFL - Memuneh
64658 posts

Uber Geek

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  # 1590288 12-Jul-2016 13:24
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Some browsers use their own network settings, other browsers use the system settings. Perhaps your system is set to use a proxy or to automatically look for proxy settings? Open Internet Explorer | Settings |  Connections | LAN Settings and check it:


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