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Don R. Crawley
President and Chief Technologist

Premium Author Don R. Crawley

Seattle, Washington, USA

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Don R. Crawley is president and chief technologist at, the Seattle, Washington firm specializing in business skills training for IT professionals and accelerated technical training on Cisco, Microsoft, and Linux products. He works with IT professionals to enhance their lives and careers.


Learn how to generate and use RSA public/private keypairs for SSH authentication from your Windows computer to your Linux/UNIX server in this handy "how-to" guide.
Learn the steps for configuring a secure site-to-site Virtual Private Network (VPN) with Cisco routers.
Learn how to configure SSH for secure remote login on a Cisco router in this "how-to" guide. SSH replaces the notoriously non-secure Telnet protocol for remote login.
In this brief article, you'll learn the basics of how Ethernet works in modern computer networks and cabling options for your network.
The Linux operating system includes substantial built-in help systems. In this article, veteran I.T. guy Don R. Crawley explains how to find and use Linux help systems.
Legitimate email marketing is a very powerful tool for your business...if you use it correctly. In this concise article, you'll learn the three keys for profitable email marketing and how you can use ...
Learn the fundamentals of building and managing access-control lists on a Cisco ASA or PIX firewall in this "How-to" guide.
Digital documents are safer, more secure, easier to search, easier to send, and infinitely easier to store. In this article, you'll learn about the benefits of using digital documents and gain some pr...
Learn how to let your customers and clients manage their own appointments by automating the appointment scheduling process with free or low cost online tools. In this brief article, automation evangel...
In this brief article, speaker and veteran I.T. guy Don R. Crawley explains the eight basic commands needed to enable basic firewall functionality on a Cisco ASA Security Appliance.
Hiring the right I.T. consultant is more important today than ever before. In this brief article, veteran I.T. guy Don R. Crawley shares the three magic questions you can ask to avoid hiring the wrong...
In this brief article, veteran IT guy Don R. Crawley explains how to configure Port Address Translation on a Cisco router in four simple steps.
Communication is really easy, but somehow we've hidden our plain language messages behind shrouds of cliches, jargon, and metaphors. In this article, veteran communication expert Don R. Crawley makes ...
Remotely manage Windows systems from the command line using the PsTools suite of free utilities.
In this brief article, you'll learn how to configure PPTP and HTTP port forwarding on a Cisco router using static NAT to allow Internet users to connect to internal resources.

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