I am using Toad for Oracle version 10.6.1.3 and it’s working great when I have an internet connection. OS is Windows 8, Oracle version 11.2.01.0. However when I am not connected to the internet I get ORA-12545: TNS: permission denied when trying to connect to the local database. I have tried disabling my firewall/antivirus and the issue persists. My TNS names refers to the local computer name not the IP. I can connect to the database through SQL without internet. Any ideas what is preventing the connection through Toad when I have no internet service?