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Copyright 2003Jupitermedia
	Most Popular Tutorials • Microsoft Vista Home Networking Setup and Options The most daunting part of upgrading to Windows Vista may be trying to figure out where in the layers of menus the networking and file-sharing options are hidden. • Do It Yourself: Roll Your Own Network Cables It may not be something you do everyday, but having the supplies and know-how to whip up a network cable on the spot can be very handy. • Tips for Securing Your Home Router Seemingly minor and easily overlooked settings can still have profound security implications. Here are some steps you can take to make sure your wired or wireless home router — and by extension, your network — is as secure as possible.
	Most Popular Reviews • Microsoft Windows Home Server If you have a home network, you'll welcome the easy file sharing, remote access and the image-based backup features of Windows Home Server. • Iomega StorCenter Network Hard Drive Iomega's fourth generation StorCenter Network Hard Drive brings many of the features found in higher-end storage devices down to an attractive price. • MikroTik's The Dude This free tool delivers many of the same capabilities that you'd find in pricey network monitoring tools. As long as you don't mind tinkering, The Dude is a decent network utility that should be worth the download.

(This is courtesy of Fred Peeler)

Start at http://linux-firewall-tools.com/linux/faq/index.html. Look for the Linux & Mediaone FAQ.

Here's a summary of what to do to get you started:

• Download the sample firewall. Deny everything. Log everything. You will be probed multiple times a week by script kiddies looking for common exploits.
  
  
• Don't run any services you don't understand. The best thing is initially to block everything inbound with the firewall. That way if something is running you are not aware of, no one can reach it anyway.
  
  
• When you want to add a specific server, like a web server for example, run it internally with the port blocked to the outside world until you have a chance to research the vulnerabilities of the software.  Then open the appropriate port in the firewall.
  
  
• If you want to run a telnet or ftp server, I would strongly recommend using tcp_wrappers and a hosts.allow and hosts.deny (see man hosts.allow) file to only allow specific addresses to connect to it.
  
  The hosts.deny file is easy:
  
  #deny everything!
  
  ALL:ALL
  
  hosts.allow should be more selective :)
  
  
• Oh, did I mention to log everything :)? Review logs regularly and send reports of attempted breakins to abuse@yourISP. But be warned if someone does get in, they may alter your logs.
  
  
• Also, know what daemons normally run on the box (ps aux | less). It will help if someone breaks in and installs something you don't want there.    Example: A thread on a recent breakin mentioned that the hacker's program changed its name to httpd on startup. Of course, if you are not running a web server (I'm not)....an httpd suddenly running would look awful suspicious......
  
  
• Subscribe to bugtraq.   This is a Unix-oriented mailing list devoted to keeping people informed of exploits.