From troubleshooting DNS queries and misbehaving network apps to keeping your configurations and passwords organized, these tools have you covered
Routing issues, slow network applications, DNS resolution problems -- a network administrator has to deal with a host of network nuisances on a daily basis. How do you survive when you're constantly under the gun to fix the problems? Like any other professional, you need a solid set of tools.
Not surprisingly, plenty of options exist in the open source camp. Excellent open source software tools are available to help you keep a close watch over your network, as well as meet many other needs of the busy network manager. From monitoring, troubleshooting, and security analysis tools to utilities for keeping track of IP allocations, passwords, and router configurations, here are my top 10 picks of the most essential open source tools for our network admin toolbox -- all free for the downloading.
[ Also on InfoWorld: "The six immutable laws for troubleshooting IT" | "Everything you need to know about building solid, reliable networks" | "10 tips for boosting network performance" | "Killer open source monitoring tools ]
This is by no means an exhaustive list of open source networking utilities available, and I've merely touched on their capabilities. Are there other free open source tools that you use regularly but we didn't list here? Leave a comment and let us know!
DNS problems plague us all, and they're easily overlooked when troubleshooting, so you need a reliable tool that provides detailed information about how users' DNS queries are being resolved. Why not use the tool made by the Internet Systems Consortium, the same group that produces the BIND DNS server software running the majority of DNS servers worldwide? That tool is Dig.
At the heart of it, Dig is a command-line utility that performs DNS queries. That alone is helpful, but Dig can also tell you most everything about the queries and replies -- you'll sometimes need that extra information to determine why you're getting a strange reply from a DNS server. The default output of Dig provides you with all the data you'll require for troubleshooting: reply/error codes from the server, flags used in the query, a reiteration of your query, the answer to your query, how long the query took, which server it received the reply from, and how much data it received in the reply. Dig can be quite useful when you're trying to diagnose slow network applications, by determining how long it takes a computer to get DNS resolution for the application server's domain name.
Those of you who signed up for the Windows 10 upgrade but changed your mind may be able to crawl out
You may be better off sticking with Win7 or Win8.1, given a wide range of Win10 trade-offs and...
Samsung's throwing another phablet into the ring, but this one's curved on both sides
New sources are stepping up questions about Oracle's stewardship of the Java development platform
What you omit from your resume is just as important to job search success as what you include
Some apps on some iPads support full split-screen capabilities, so be prepared for a variable user...
The latest Start menu has few of Win7-era customizations -- but many new tricks worth knowing