A MacBook Pro 13" 13.
A. faculty, with access to the Internet via Institute proxy.
The laptop IP is obtained via DHCP ( and calmly pinged other machines in your network. ).
In the settings you prescribed proxy for http and HTTPS ).
When you first connect, the Internet was available.
At all subsequent, the browser says that there is no access to the Internet, and requires either to diagnose, or disabling the proxy.
Also, I noticed that the MacBook machines can't determine the IP address via dns name. While laptops other firms to calmly find the IP address for this dns name, even without specifying a dns server. Default and there are 22.214.171.124.
The Wins server has registered itself is probably. The address differs from the address of the proxy server.
Don't know, plays the role of NetBIOS, but there is registered the name of my accounts.
The port for the proxy is registered, it is not protected, and does not require a password.
The question is, what could be the problem as my side and server-side? What can I try?
Not really something my computer could automatically zablocie on this Institute's proxy server :)
PS. in the address field of the proxy server pointed to the IP and not dns name.