slaptijack

Is your network bandwidth being consumed by Peer-to-Peer (P2P) traffic? (Hint: If you don't know, it's time to fire up NBAR and do a little investigating.) One way to stop P2P traffic is to use an access-list to block traffic on the well-know P2P ports. Unfortunately, many P2P technologies no …

I've written before regarding the command-line email client Mutt, and how useful it can be. Unfortunately, Mutt is designed to read a local mail spool by default. If you need to use Mutt to read email from a remote mail server, <acronym title="Internet Message Access Protocol">IMAP</acronym> may …

I've recently begun designing my own WordPress theme. The last time I really worked with any sort of web "design" (I'm using that word rather loosely here), layout was done via tables instead of divs. Stephen at Acadian Imaging told me that in order to get my theme to work …

I recently wrote about using Cisco's NBAR to investigate what protocols were in use on your network. I thought it might be interesting to take a look at the top 10 protocols on a residential broadband network. If you're running a large network, or planning a large network, perhaps this …

The following is a list of alarms you may receive on your T1 or T3 (or E1/E3) interface. Where applicable, troubleshooting hints are included.

Loss of Signal (LOS)

A Loss of Signal (LOS) alarm indicates that the interface is not receiving a valid T1 or T3 signal. This is …

Mutt is a text-based email client for UNIX-based operating systems. To say it is highly configurable is an understatement. It can be compiled to support a variety of mail protocols and runs in almost any terminal emulator. Unfortunately, the glory days of Mutt have come and gone. In the days …

This is a little off-topic for this website, but I had to pass this widget along for any Mac OS X users out there. The MLB Schedule widget from Logan Rockmore Design is a simple widget that displays the 5 day schedule for any MLB team. It will show the …

When calling an AGI from inside your dialplan, you can pass variables to your AGI via the AGI() application call. The AGI() application takes parameters in the following format (note the ';' is only necessary in AEL:

AGI(command|ARG1|ARG2|ARGn);

The additional arguments are useful when passing in non-channel …

In a Metro Ethernet network, the possibility exists for a lot of NetBIOS broadcasts if your users are connecting directly to the ring rather than through a firewall. My first assumption was that most users would have a firewall, but this is really only guaranteed in the case of business-class …

Many network administrators already know how to use tools like Cacti or MRTG to monitor the usage on their network links. (If you don't, let me know and I'll show you how.) Unfortunately, those tools only reveal part of the story. They show you how much traffic is traversing a …