A firewall is a device that controls the flow of information between your computer and the
internet, similar to a router. Most modern operating systems include a software firewall. In
addition to the operating system’s firewall, the majority of home routers have a firewall built in.
Refer to your user’s guide for instructions on how to enable your firewall. Once your firewall is
enabled, consult the user’s guide to learn how to configure the security settings and set a strong
password to protect it against unwanted changes. ...
In this module we are going to look at legacy Windows Desktops. This includes Windows 98 and
Me, which are similar. The most important thing to know about Windows 98 and ME is there is no
file security and there is no authentication necessary. Even if you configure the system for multiple
users and have a password screen at bootup, anyone can hit “Cancel” and still get in. Access to files
depends on access to the machine.
This module will address password security. Although user names and passwords are a familiar
technology, most people are not aware of the inherent weaknesses in many of the different passwordbased
authentication schemes in use today. These weaknesses are important to understand since many
networks would be compromised if passwords on just a few key machines (such as firewalls, DNS
servers, or Windows domain controllers) were known to an attacker.
OpenSSH is an open-source implementation of the SSH (Secure SHell) protocols, originally developed in 1995 by Tatu Ylönen. SSH-based tools provide secure client/server connections and are usually designed to replace older remote-access tools like rsh and telnet. Unlike their predecessors, SSH-based tools encrypt their transmissions, making it difficult or impossible for intruders to “sniff” important information, such as passwords, from the data stream. SSH implementations exist for every major platform including Microsoft Windows. This paper will focus on the OpenSSH implementation....