Below you can see a full list of articles listed in our Security category (Page 2):

Packet sniffers
Packet sniffers - Tools that intercept network traffic and can compromise security
Packet sniffers are specialized tools that are usually designed to help network administrators in monitoring networks and troubleshoot network problems. However, these tools can be dangerous for security if used in the wrong fashion. A packet sniffer is either some kind of hardware appliance, or software installed on a desktop or server computer, that has the ability to capture network packets and record them, usually for network maintenance and monitoring purposes. Such tools are ...
List of known TCP ports 1
List of known TCP ports 1- A list of known TCP ports and their default service assignments, and information about the availability of these ports and services on Windows computers
List of known TCP ports - Part 1 Here is a list of known TCP ports and their default service assignments, and information about the availability of these ports and services on Windows computers: TCP Port 21 – FTP (File Transfer Protocol). This protocol is suitable for transferring files between computers. If your computer actually works as a FTP server, then it is normal to have port 21 open; otherwise you should take measures to block this port since the possibility of ...
List of known TCP ports 2
List of known TCP ports 2 - A list of known TCP ports and their default service assignments, and information about the availability of these ports and services on Windows computers
List of known TCP ports - Part 1 Here is a list of known TCP ports and their default service assignments, and information about the availability of these ports and services on Windows computers: TCP Port 135 - Location service. TCP port 135 is used by RPC (Remote Procedure Calls) and provides location services for dynamically assigned ports, to be used for RPC calls under Windows. Therefore, this port can be used by an attacker to locate Windows services and the ports they are ...
Disable browser scripting to improve security
Disable browser scripting to improve security - how to fight these serious risks and protection measures against malicious code and scripting vulnerabilities
Computer users should be aware of the serious risks that their computer is exposed to, while surfing the web. Many of the websites visited may contain malicious code that can be used by the website owner to attack their computer in various ways. Recent statistics have shown that at least 1.5% of the Internet websites available are attempting to install trojans and other malicious programs into visitor's computer via a web browser or email client. The problem comes from the use of ...
Prevent data alteration - security protection measures
Prevent data alteration - security protection measures - backup your data
One of the key elements of computer security, apart from defending against intrusions and attacks, is to prevent data alteration in such a way that whenever an attack on your computer has been successful, you will still have your data and be able to restore your computer to full functionality and good use. There are many reasons why you should think about post-disaster scenarios. First of all, no computer is 100% secure. Even the most sophisticated networks protected by firewalls and ...
Tips for improving computer security under Windows XP, Part 1
Tips for improving computer security under Windows XP, Part 1 - How to strenghten computer security under Windows XP
Can a Windows operating system be secure? And to be more specific, can Windows XP be secure? Many users may tend to believe that security and Windows don't mix. We all heard about Windows security vulnerabilities, and learned how well-known computer worms like Sasser for example, took advantage of them to spread around the world, infecting millions of computers worldwide in just a few days. Despite these problems, the truth is, that a computer running Windows XP can be anything from completely ...
Tips for improving computer security under Windows XP, Part 3
Tips for improving computer security under Windows XP, Part 3 - How to strenghten computer security under Windows XP
10. You should also disable the Windows Messenger service, which is normally used by programs and users to send messages between computers in a local network, as it can be used in some sort of Internet – based advertising exploit. Users may experience unwanted message windows popping up on their desktop, with information about certain products or services that are usually promoted through email spam. To get rid of all these messages, simply disable the Windows Messenger Service. Please note ...
Ports and port scanning - Open ports, closed ports and stealth ports
Ports and port scanning - Open ports, closed ports and stealth ports - Information about port scanning, TCP ports and how to use a firewall to protect your computer
A common technique used in order to identify possible vulnerabilities on remote computers, in order to breach security measures on these computers and take control over them, is port scanning, in its most common format of TCP port scanning. How does port scanning work? Well, an attacker will usually use a TCP port scanner to scan various ports on the remote computer. There are many types of port scanning software that these attackers can use; some of these tools are used to scan only ...
Windows Messenger spam
Windows Messenger spam - Unwanted message windows appearing on your desktop - threat information and removal instructions
Many Windows based computers worldwide are still affected by Windows Messenger Service spam - please note that we are talking about the Messenger Service in Windows, and not about the well known Windows Messenger application, used by many Windows users to communicate with other people. The Messenger Service is a built-in Service that comes with Windows operating systems, and is included in all NT-based operating systems like Windows NT, Windows 2000, Windows 2003 and Windows XP. The ...
Internet protocols and security
Internet protocols and security, basic information and more
In order to understand computer security, it is important for readers that are not familiar with internet technology, to learn a few basic concepts and find out more about Internet protocols and how computers work when connected to the Internet. Most computers today are connected amongst themselves through a worldwide network also known as the Internet. Users may be familiar with the physical devices that allow their computer to connect to the Internet (cables, routers and such) but ...
Antivirus Software
Antivirus Software - Prevent virus damage and protect your computer
It is important to understand why having a proper antivirus software installed on your computer is one of the key features your computer needs in order to be protected and to prevent virus damage and other such problems from affecting you. In the past, viruses were spreading through floppy disks and infected boot sectors. The virus needed a lot of user interaction in order to spread around. In order to infect a computer, the user would have to bring a floppy disk that has been used ...
Disable ICMP Redirect
Disable ICMP Redirect - Windows security, networks and security
Disable ICMP Redirect Here we explain why users should disable ICMP redirect messages and how to do this on Windows operating system. But first of all, we must outline that ICMP is an important protocol for proper communication between servers and/or networks. ICMP is heavily used by routers, as welll as clients and servers (network endpoints) to determine network errors and availability, as well as performance statistics through various types of ICMP Packets. Beyond this ...