Using telnet Telnet is often used when diagnosing problems, to manually "talk" to other services without specialized client software. For example, it is sometimes used in debugging network services such as an SMTP, HTTP, FTP or POP3 server, by serving as a simple way to send commands to the server and exami ... Applies To: All Service Types

Clearing Your Browser's Cache Clearing your browser's cache can help with viewing recently changed web pages when they are not showing up properly. The following procedures provide steps to clear the cache for a variety of browsers: Firefox Firefox 1.0 Firefox 2.0 Firefox 2.5 Microsoft® Internet Explorer Internet Explorer ... Applies To: All Service Types

Finding your current IP Address Every device connected to the public Internet is assigned a unique number known as an Internet Protocol (IP) address. IP addresses consist of four numbers separated by periods, e.g. 127.0.0.1. Knowing the current IP Address of your home computer can be helpful when troubleshooting an issue. ... Applies To: All Service Types

Checking your outgoing mail server (Is Port 25 blocked?) Many email clients and services use port 25 for SMTP to send out emails. However an ISP (Internet Service Provider) may block port 25 in order to prevent spamming by its customers. Here is how you can check to see if port 25 is blocked on your network. TIP: This article assumes that you know ... Applies To: All Service Types

Understanding the dig command The command dig is a tool for querying DNS nameservers for information about host addresses, mail exchanges, nameservers, and related information. This tool can be used from any Linux (Unix) or Macintosh OS X operating system. The most typical use of dig is to simply query a single host. Run t ... Applies To: All Service Types