While browsing a website in Google Chrome, you may receive a message that the website you are attempting to access is not private. This message indicates the web page you are trying access has an SSL certificate installed that is not trusted by your computer. Chrome cannot find a trusted certificate installed on your computer. This...

Traceroute allows you to discover a network path from one host to another. Traceroute is extremely helpful examining network hops (or network devices traversed over) and information including IP Address, DNS servers, and average time taken over each hop. A popular use of traceroute is to identify network bottlenecks (poor speed performance) happening in network equipment...

Ping is a quick test of network connectivity between one host and another. Use ping to troubleshoot basic network connectivity issues. Ping allows you to send a network packet to another device in an attempt to solicit a response to confirm if a device is online or not. Use Terminal in Mac OS X to ping...

When you try to browse a website using Google Chrome, you may receive a connection refused message.   This site can’t be reached. “” refused to connect.

ERR_CONNECTION_REFUSED   This error means the website your tried accessing had either blocked, dropped, or refused your connection. This may happen when your IP address is being...

You may receive an error when you try to purchase or restore a purchase from the App Store. 

Restore Failed. Please try again. (Domain: SSErrorDomain: Code: 16)   You either never purchased the app or the App Store is currently having issues processing your request.