Computer Science students at the University of Toronto are more than familiar with this problem. You want to use the cslab wifi network, but you accidental opened Firefox before you ssh-ed in to bypass the firewall. Great, now you don’t have access to you homepage (which is really inconvenient if Google is your homepage) or IM.
This was a huge problem for me while I was using my Mac. Victoria showed me a quick fix where you enter the command:
dscacheutil -flushcache
to flush your DNS and continue browsing.
The same problem recently happened again while I was using Windows 7 on the cslabl network. On Windows 7, you can enter a similar command in cmd/PowerShell:
ipconfig /flushdns
Happy browsing!
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