I am unsure about proxy.pac as I have not heard about this, so maybe ignore my answer. It should be checking your hosts file before anything else, it is possible that a old entry is cached. Close Internet Explorer, Go to a (elevated on Vista/7) command prompt and type ipconfig /flushdns and restart IE. Power Tool Essentials Minecraft Color on this page.
For larger networks, use the proxy automatic configuration methods as described in this section. Internet Explorer LAN settings - Manual Proxy Server. To add the Firebox address and any other local IP addresses to make sure you bypass the proxy. Start with managing Office 365 endpoints to understand our recommendations. Except for emergency changes, endpoints are updated at the end of each month.
Test it now, if it still does not work because of a proxy file, (again, I have little experience here), try adding it to the exceptions in the proxy list. As your are pinging the correct IP, I think it is just a cache issue as I have sometimes had the same thing after just adding a entry. A restart for me usually does the trick.
Hi, Please take a check to see if the following KB article could help here: The cause: By default, only host names are checked when the Bypass proxy server for local addresses option is turned on. The resolution here is: To bypass a range of IP addresses or a specific domain name, specify the addresses in the proxy exception list: • In Internet Explorer, on the Tools menu, click Internet Options. • On the Connections tab, click LAN Settings. • Click Advanced, and type the appropriate information in the Exceptions area. Hope this may help Best regards Michael Shao TechNet Community Support.