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Set up Samba to serve as a domain controller
Samba can serve as an NT4-style domain controller. Jack Wallen shows how to do this on a Ubuntu Server 11.04 machine.
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Five free network monitoring tools
Among the wide array of network and system monitors, you'll find several that do what the pricier tools do -- for free.
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Five free tools to ease network monitoring chores
Stay on top of performance issues and head off potential problems with the help of these free tools.
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DIY: Extend your wireless range on the cheap with a second wireless access point
If your business needs to extend its wireless range but doesn't have the budget for a complex setup, Jack Wallen has the solution for you.
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DIY: Limiting IP addresses on routers
Jack Wallen answers a reader's question about configuring a Wi-Fi router to set up a whitelist or a blacklist.
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DIY: Get top-quality open source security tools in one distro
Once you use the open source Network Security Toolkit distribution, Jack Wallen predicts you'll wonder how you ever did without it.
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DIY: Wireless printing while on a VPN
In this installment of Ask Jack, read about one way to print to print wireless printers while being connected to the VPN.
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DIY: Cache credentials on a domained PC
In response to a reader's question, Jack Wallen devised a trick for caching credentials on a domained and VPNed PC when the VPN isn't available.
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Five tips for faster remote network troubleshooting
Solving network problems can be a challenge, particularly if you're not on site. Jack Wallen offers a methodical approach for working through the troubleshooting process.
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Quick Tips: Flush the ARP cache in Windows 7
Jack Wallen shows you how to clear the Address Resolution Protocol cache and how to manage that cache with a few command switches.