Tunnelblick/Viscosity random connection issues even when not connected to VPN I have random connection issues after using Tunnelblick or Viscosity, where existing connections don't seem to drop (SSH, Skype, Hangouts,...) but nothing new can be established, ie. ping to 8.8.8.8 times out. It is pretty obvious because IRC warns about reconnections.

Using a MacBook Pro Retina 13" Early 2015 with Yosemite 10.10.3


connection issues last between a few seconds and up to 15 minutes, I monitored this with a continuous ping to 8.8.8.8 and other destinations, and they time out, eventually working again by itself
connected by wifi, but connection to router is not affected, ping to 192.168.1.1 works fine even when external ping is timing out
other computers/phones in the same network don't have this issue, including a 2011 MacBook Pro with same 10.10.3 that IIRC used TunnelBlick recently
wifi disconnect/reconnect fixes the connection, and so it does refreshing the DHCP lease with 
echo "add State:/Network/Interface/en0/RefreshConfiguration temporary" | sudo scutil
after restarting everything works fine until Tunnelblick/Viscosity are used. Then the issue starts to happen randomly again, even after closing them
Completely uninstalling Tunnelblick also made the issue go away, but need the VPN at some point


It would help to at least be able to unload Tunnelblick/Viscosity completely without the need to restart
It should not be necessary to "uninstall", "unload", or "quit" Tunnelblick to make your issue go away.

In some situations, where the OpenVPN configuration itself is faulty (and it sounds like yours is), you might need to have Tunnelblick "Reset the primary interface after disconnecting". You can do that by selecting the configuration(s) you wish to modify in Tunnelblick's "VPN Details…" window, then clicking the "Advanced" button and putting a check in the corresponding checkbox.

For further Tunnelblick support, you should use the Tunnelblick Discussion Group at

https://groups.google.com/forum/#!forum/tunnelblick-discuss

Before you post to that group, please read

https://code.google.com/p/tunnelblick/wiki/cBeforeYouPost