networking

Nmap—Not Just for Evil!

If SSH is the Swiss Army knife of the system administration world, Nmap is a box of dynamite. It's really easy to misuse dynamite and blow your foot off, but it's also a very powerful tool that can do jobs that are impossible without it. more>>

Localhost DNS Cache

Is it weird to say that DNS is my favorite protocol? Because DNS is my favorite protocol. There's something about the simplicity of UDP packets combined with the power of a service that the entire Internet relies on that grabs my interest. Through the years, I've been impressed with just how few resources you need to run a modest DNS infrastructure for an internal network. more>>

Wondershaper—QOS in a Pinch

In past articles, I've discussed my BirdCam setup and how it automatically archives video footage from my bird feeders to YouTube every night. That's a really cool process, but unfortunately, it saturates my upstream bandwidth in the evening. more>>

EdgeRouter Lite

In the September 2014 issue, I mentioned my new router, and I got a lot of e-mail messages asking about how well it works. I can say without hesitation it's the nicest router I've ever owned. And, it was less than $100! more>>

Monitoring Android Traffic with Wireshark

The ubiquity and convenience of smartphones has been a real boon for getting information on the go. more>>

June 2014 Issue of Linux Journal: Networking

I tend to be a fairly funny guy. Well, at least I think I'm funny. My kids might disagree. The thing is, it's hard to find a group of people to understand obscure networking jokes. more>>

New Products

Please send information about releases of Linux-related products to newproducts at linuxjournal.com or New Products c/o Linux Journal, PO Box 980985, Houston, TX 77098. Submissions are edited for length and content.

Non-Linux FOSS: Angry IP

The de facto standard for port scanning always has been the venerable Nmap program. The command-line tool is indeed very powerful, but I've only ever seen it work with Linux, and every time I use it, I need to read the man page to figure out the command flags. more>>

LVM, Demystified

I've been a sysadmin for a long time, and part of being a sysadmin is doing more than is humanly possible. Sometimes that means writing wicked cool scripts, sometimes it means working late, and sometimes it means learning to say no. Unfortunately, it also sometimes means cutting corners. I confess, I've been "that guy" more than once. A good example is SELinux. more>>

DNSSEC Part I: the Concepts

Like IPv6, DNSSEC is one of those great forward-looking protocols that unfortunately hasn't seen wide adoption yet. Before I implemented it myself, I could see why. Although some people think BIND itself is difficult to set up, DNSSEC adds an extra layer of keys, key management and a slew of additional DNS records. more>>

Fight the Good Fight with SmokePing

My Internet connection is unstable. I do realize ISPs generally claim some downtime is expected, and service is not guaranteed, and countless other excuses are common for intermittent service. I currently pay $120/month for business-class service, however, and I expect to get reliable Internet access on a regular basis. more>>
Linux Journal Networking Cover

July 2013 Issue of Linux Journal: Networking

When our house was built a few years ago (after our house fire), one of the things I wanted was a house wired for Ethernet connectivity. more>>

Wi-Fi Mini Honeypot

Do you have an old, unused wireless router collecting dust? Have some fun and make a Wi-Fi honeypot with it! more>>

New Products

Please send information about releases of Linux-related products to newproducts@linuxjournal.com or New Products c/o Linux Journal, PO Box 980985, Houston, TX 77098. Submissions are edited for length and content.

Non-Linux FOSS: Dive Deep with Wireshark

Before you say anything, yes, I know Wireshark is available for Linux. This time, however, Windows and OS X users get to play too. Wireshark is an open-source network analyzation tool that is really an amazing tool for troubleshooting a network. more>>

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