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- SolutionBase: Administer PacketFence with ease via Web interface
- PacketFence is fairly demanding to install, but once you get into the administration of the system via the Web-based administration tool, things become a whole lot easier. Jack Wallen guides you through installation of the tool. PacketFence is one of the most difficult systems I've installed, while...
- Technical articles 2007-12-21
- Cisco administration 101: Understanding Ethernet MAC addresses
- While you're probably familiar with Ethernet MAC addresses, how much do you know about working with them in the Cisco IOS? In this edition of Cisco Routers and Switches, David Davis tells you how to determine the MAC address, change it, and use it to filter traffic. Chances are...
- Technical articles 2006-10-12
- Lock down Cisco switch port security
- One way to boost network security is to use Cisco's Port Security feature to lock down switch ports. In this edition of Cisco Routers and Switches, David Davis introduces you to the basics of port security, tells you how to configure this feature, and explains how to view its status....
- Technical articles 2006-10-05
- Quickly gather MAC addresses in Windows XP with ARP
- Securing a wireless Windows XP network? You don't need to go from computer to computer to gather the MAC addresses of each client computer. Greg Shultz explains how to get into the ARP cache, and learn all the MAC addresses on your network. When securing a wireless Windows XP...
- Technical articles 2006-08-23
- Create a reservation to allocate specific IP addresses through DHCP in Windows 2000 Server
- Learn to create a DHCP reservation and assign specific IP addresses to the MAC addresses of target computers. Want more Win2K tips and tricks? Automatically sign up for our free Windows 2000 Server newsletter, delivered each Tuesday! Dynamic Host Configuration Protocol DHCP provides automatic and...
- Technical articles 2005-03-17
- The pitfalls of MAC filtering
- If you’re familiar with 802.11b wireless networking, you’ve no doubt heard the horror stories about how weak Wired Equivalent Privacy WEP is. In the rush to move away from WEP and its supposed weakness, many organizations have implemented Media Access Control MAC filtering as their sole wireless access point WAP...
- Technical articles 2004-12-13
- Tech Tip: Add details to the Getmac command's report
- You may be familiar with the Getmac command, one of Windows XP's handy command line utilities. Getmac displays the physical or media access control MAC address assigned to a network interface adapter in a local or a remote computer. Knowing the MAC address...
- Technical articles 2003-12-08
- Tech Tip: Use ARP to track remote MAC addresses
- Windows XP comes with the Getmac command-line tool, which you can use to quickly ascertain the physical or media access control MAC address assigned to a network interface adapter in a local or remote computer. Knowing the MAC address comes in handy for...
- Technical articles 2003-12-08
- Tech Tip: Implement port security to maintain security behind the wall
- By Mike MullinsControlling the devices that are plugged intoyour internal network is one of the most fundamental aspects ofnetwork security. While most security administrators do a good jobof erecting a fortress wall to keep the Internet at bay, we don'ttend to maintain security behind that wall quite as well. ...
- Technical articles 2003-12-08
- The pitfalls of MAC filtering
- Why MAC filtering isnt a lone solutionIf you’re familiar with 802.11b wireless networking, you’ve no doubt heard the horror stories about how weak Wired Equivalent Privacy WEP is. In the rush to move away from WEP and its supposed weakness, many organizations have implemented Media Access Control MAC filtering as...
- Technical articles 2002-11-04
- Lock IT Down: Think security when setting up an 802.11b wireless network
- 802.11b wireless network securityMany companies are already deploying wireless technologies, and others are only moments behind. But before your company implements an 802.11b wireless network, you should consider how you'd secure it. In this Daily Feature, I'll show you some obvious and some not-so-obvious ways to keep your wireless network...
- Technical articles 2002-04-22
- Using Windows' IP Configuration utility to troubleshoot TCP/IP
- The Windows IP Configuration tools come in different flavors, depending on whether you're running Windows 9x, NT, or 2000. In this Daily Feature, Greg Shultz explains the basic options available when you use Ipconfig.exe.Troubleshooting and diagnosing TCP/IP problems on a Windows network can be difficult. However, the task is easier...
- Technical articles 2001-04-27
- Playing with Cisco access lists
- Although typically considered Cisco's low-end security tool, access lists are far more productive. If you're new to Cisco, you will want to get to know this tool, and Alexander Prohorenko is here to help.In this Daily Drill Down, I'm going to help you understand what Cisco’s access lists are, how...
- Technical articles 2001-03-06
- Lock IT Down: Defending your MAC address
- Learn about the internal addresses on your computer that can open you to attackIn my article “Can you protect your MAC address?” I asked TechRepublic members to solve a security problem that has been perplexing me for some time. The problem stems from the ability to set your own MAC...
- Technical articles 2001-02-01
- Get IT Done: Can you protect your MAC address?
- How to protect your MAC addressIn the recent article “Beware of your MAC address,” I put forth the premise that the inherent ability to set your MAC address was a vulnerability. While some TechRepublic members vehemently disagreed, others were disappointed I didn’t disclose the registry keys used to set the...
- Technical articles 2000-11-27
- Lock IT Down: Registry hack can unlock MAC address vulnerability
- Reveals a security concern created by the ability to change a computers MAC address through the Windows RegistryA colleague and I recently faced a perplexing problem, which led us to a startling discovery. It is possible to set the MAC address of almost any computer on your network! To think...
- Technical articles 2000-09-13
Additional Resources
- SolutionBase: Block unwanted network access with PacketFence
- PacketFence does, via open source, what many applications costing hundreds to thousands of dollars do. Jack Wallen explains what makes this system a fully viable solution for a variety of situations. Recently, I spent a good amount of time installing the open source Network Access Control system...
- Technical articles 2007-12-19
- SolutionBase: Use PacketFence to stop unwanted network traffic
- Looking for a system that blocks illegal downloads without breaking your IT budget? Jack Wallen introduces PacketFence, an open-source network access control NAC system. How many times have you administered a network only to find certain users installing and using forbidden applications such as LimeWire or Gnutella?...
- Technical articles 2007-12-18
- SolutionBase: Discover open source alternatives for NAC on your network
- Are commercial NAC products not in your budget? David Davis explains why you should consider open source NAC solutions. Network Access Control NAC is a buzzword in networking today, although the products are still in their early stages. Large commercial NAC products can be very expensive; you're...
- Technical articles 2007-12-10
- SolutionBase: Add remote connectivity to your Mac
- No longer just a luxury, staff now rely on remote connectivity to office systems to complete work from home. Fortunately, Apple systems benefit from remote connectivity capabilities, too. Windows-based offices that deploy Macs will find Macs capable of completing painless secure remote desktop connections to Windows systems and VPNs, as...
- Technical articles 2007-09-17
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