Unable to access http://safesquid.cfg/ using the Proxy Setting

Hi, I am Unable to access http://safesquid.cfg/ after configuring the Proxy setting on system and Browser. I am able to access the server via SSH and also the safesquid server is running .
Attached are the snapshot of
proxy server setting

before proxy error

after proxy error.

Hello ,

When you Connect to the Ubuntu Server using Putty you connect via the IP Address.
The Problem over here is you are using a FQDN in the Proxy Address which will NOT resolve any IP address or maybe resolve a WRONG Address.
In Simple words, Put the IP address of Ubuntu Server in the Proxy Address Field.