Unable to access the main site collection (inside SharePoint on-premises server) outside the server network

Question

I am facing this problem inside our customer's on-premises sharepoint server 2013:-

1. when i try to access the main site collection using the servername http://serverABC/, from the sharepoint server itself i was prompted to enter username/password, and i access the site correctly.

2. when i try to access the main site collection using the servername http://serverABC/, from a server within the customer's network, I was prompted to enter username/password, and i access the site correctly.

3. But the problem when i try to access the main site collection using the servername http://serverABC/, from a server outside the customer network (from my PC), i was prompted to enter username/password as follow:-

4. but when i enter the username/password, i will be prompted to enter the username/password again for 3 times, then i got this page:-

Now inside my PC i try to ping the sharepoint server ip and i got correct reply. so the server ip is accessible from my PC, and i have changed my hosts file inside my PC as follow:-

192..*.2** servernameABC

So seems the server is accessible from my PC (since i can ping the IP + when i try accessing the main site collection i was prompted to enter username/password and i did not get http not found error). but not sure why i can not login to the sites? and i keep getting username/password popup for 3 times then i got http 401 error??

Answer 1

You might have a proxy configured in your Internet Options of Internet Explorer. This will bypass any HOSTS-Entries and ping-checks.