Home Page


Email & Spam

Security Terminology

Security Topics

VPN & Cryptography



Protocol Terminology


Ports Protocols and IP Addresses

Radius and TACACS

SSH and Telnet





Which Network Firewall

Which Home Firewall

Network Firewall Buyers Guide


Security Products Guide

Which Anti-Virus Software?

Which Firewall?

Which Spam Filter?

Which Internet Security Suite?


What is Guide

What is a Firewall?

What is a Virus?

What is Spam?


Essential Security Guides

Securing Windows XP Guide

Securing Windows Vista Guide

A Guide to Wireless Security



Top 8 Internet Security Tips

Why both, Firewall and Anti Virus?

Free or purchased security - Which one?




Telnet and SSH


Telnet and FTP protocols are still used but a little less frequent today due to being insecure protocols. Basically you can see everything in clear text, as well as other security vulnerabilities.

The Telnet protocol which runs on port 23 is used for remote connectivity utility such as when remotely logging into a Linux box to run commands. The SSH protocol which runs on port 22 is the secure alternative for Telnet and is used by all security vendors to remotely connect to firewalls and other security solutions. It is also used by many in general to access their Linux OS due to corporate security policies or because of the fact that it is secure.