Linux Network Security - Page 74

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WLAN Security Concerns: WEP Protocol Risks for UK Companies

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Serious doubts remain over the security of the Wireless Equivalent Privacy protocol as firms rush to clear the cables. About one in four UK companies is looking to wireless local area networks (WLANs) to increase the flexibility of . . .

Anthony Pell
Jul 23, 2001

Effective Solutions For Wireless Network Security Issues

Security managers need to be aware of the inherent weaknesses in wireless technology, which although similar to those in wired networking, add a few more headaches. According to security professionals, the IEEE wireless protocol 802.11 not only shares unlicensed frequencies with . . .

Anthony Pell
Jul 22, 2001

Critical Flaws In IEEE 802.11 Wireless Standard And Encryption Threats

A cryptologist who discovered several gaping holes in the international standard governing the design of wireless network devices and the encryption algorithm meant to protect those networks last week detailed vulnerabilities that could be leaving corporate systems open to hackers.. . .

Anthony Pell
Jul 16, 2001

IBM Wireless LAN Security Analyzer: Real-Time Node Identification

The research arm of IBM Corp. has a software tool under development to identify wireless LAN nodes that are vulnerable to a sneak attack by hackers, the company announced Thursday. Prototyped on a Linux-based wireless personal digital assistant (PDA), the device . . .

Anthony Pell
Jul 16, 2001

Replacing Unsecured FTP and Telnet With SSH and SCP Protocols

Telnet and ftp send passwords over the network in clear text that can be easily sniffed. You should replace them with more modern tools such as ssh and scp. SSLtelnet/SSLftp are also available but do not seem to be in such wide use.. . .

Anthony Pell
Jul 13, 2001

Effective Techniques to Mitigate DoS Attacks on Linux Systems

Halting Denials of service attacks a quick and dirty primer on settings and commands to stop or slow down most Denial of Service attacks when your under the gun. Some of the commands were gathered around the net others I have implemented and tested along the way in the midst of attacks as well as in labs. . . .

Anthony Pell
Jul 12, 2001

Understanding Session Hijacking Risks And Encryption Techniques

Session hijacking. What a powerful name. For me personally, the name conjures up mental pictures of airplanes with masked gunmen and bomb-laden buses. In actuality, session hijacking is far less physically dangerous and way more financially rewarding. The risk . . .

Anthony Pell
Jul 11, 2001

Enhancing Network Efficiency Through Effective VPN Management

As companies build larger and larger VPNs, they are faced with a chore that grows with the networks: effective management. It's an important issue to pay attention to because a good VPN management platform is not just a matter of convenience . . .

Anthony Pell
Jul 08, 2001

ISS: 2001-0534 Critical: RADIUS Buffer Overflow DoS Risk

ISS X-Force has discovered buffer overflow vulnerabilities in two popular Remote Authentication Dial-In User Server (RADIUS) implementations. RADIUS was originally designed to manage user authentication into dial-up terminal servers and similar devices. It has since been used as a standard for access control and user authentication for numerous Internet infrastructure devices, including routers, switches, and 802.11 Wireless Access Points. . . .

Anthony Pell
Jul 06, 2001

Kerberos Authentication For Secure Network Identity Verification

Kerberos is an authentication protocol that lets clients and servers reliably verify each other's identity before establishing a network connection. Developed at MIT in the late 1980s, Kerberos takes its name from the three-headed hound in Greek mythology that guards the entrance to Hades. But instead of guarding the underworld, today's Kerberos brings a measure of security to a distributed computer environment, where one computer can access the resources of any other machine on a network.. . .

Anthony Pell
Jul 05, 2001

Analyzing Performance Monitors: Top vs Ntop on Linux Systems

You may already be quite familiar with a tool in your system called top that we discussed on this very corner back in our Tweaking Tux series. What top does is provide a graphical (ncurses-based) interface to your system's performance, load . . .

Anthony Pell
Jul 05, 2001

Daily Network Security Management Insights from Gregor Bailar at NASDAQ

Every morning, Gregor Bailar, executive vice president of operations and technology and CIO of NASDAQ, pores over the previous day's security report. "We have hundreds of different types of hacking and other security attempts in any given week," he says. . . .

Anthony Pell
Jul 05, 2001

Addressing Network Security Challenges In Our Digital Age

Networks dominate today's computing landscape and commercial technical protection is lagging behind attack technology. As a result, protection program success depends more on prudent management decisions than on the selection of technical safeguards. Managing Network Security takes a management view of protection and seeks to reconcile the need for security with the limitations of technology. . . .

Anthony Pell
Jul 02, 2001

Setting Up IPv6 Router and Workstation on Red Hat Linux System

Pekka Savola has announced an IPv6 project that he's working on that allows you to configure Red Hat to test and configure IPv6. "There are two "products", Linux IPv6 Router and IPv6 Workstation. The installation and the configuration of either is very easy and should not take longer than 1 hour, tops. The default installation is very secure. . . .

Anthony Pell
Jun 27, 2001

Layered E-Commerce Security Inspired By Fortress Builders

What to do? Well, you could try an old-fashioned layering approach that was used by fortress builders. According to a new white paper on e-commerce security entitled "An Electronic Citadel -- A Method for Securing Credit Card and Private Consumer Data . . .

Anthony Pell
Jun 27, 2001

Importance of Nmap in Network Security for Administrators

Why are scanners so important for the security of networks?. Basically because they are essential tools for those who want to attack a system. There are several scanning tools for this purpose, but the article will look at nmap only. Nmap is among the most complete scanners and security tools.. . .

Anthony Pell
Jun 26, 2001

Evaluating Security Challenges of Wireless LANs for IT Administrators

Wireless LAN products are becoming increasingly popular, with a growing number of companies implementing them to extend their LANs. Many IT administrators wonder if wireless LAN access pose a new type of security risk. In fact, most WLAN products now have . . .

Anthony Pell
Jun 25, 2001

Startups Receive $100M Funding To Combat DoS Network Attacks

With more than $100m in venture funding, four startups aim to combat denial of service (DoS) network attacks, which by some estimates total more than 4000 a week. Arbor Networks, Asta Networks, Lancope Technologies and Mazu Networks are attempting to automate . . .

Anthony Pell
Jun 22, 2001

Raw Socket Risks In Microsoft Windows XP Under Scrutiny By Security Experts

The software giant is accused of corporate hubris for issuing a flat denial that its raw socket support in Windows XP is a paradise for zombie hackers Microsoft's assurances that Windows XP will not make it easier for hackers to launch damaging Denial of Service (DoS) attacks across the Internet have been dismissed by the security expert who first alerted the company to the issue.. . .

Anthony Pell
Jun 11, 2001

Techniques for Port Scanning to Improve Security on Linux Systems

Port scanning is an important tool to detect what services your computer is running. Although they are getting better, many default Linux installs still leave many unnecessary services on, which can open your machine to security compromises.. . .

Anthony Pell
Jun 08, 2001

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