This issue is caused by the Tunnelblick DNS configuration. Please follow the steps below to resolve it:
- Click on the Tunnelblick icon in the taskbar and choose VPN Details.
- On the Details window, click on Settings. Click on the Set DNS/WINS option and select Set nameserver and re-connect.
- If that does not work, set it to nameserver (3.0b10) and re-connect.