This past week's TechMail tip is Detect intruders on your network with Snort which is a quick primer on how to use the Snort IDS (Intrusion Detection System). Snort is pretty cool if you have the patience to deal with it and the time to invest in setting it up …

This week's TechMail is Set up a TFTP server for easy network boots and firmware upgrades, which pretty much explains the process of setting up your own TFTP server. I had to figure this one out a while ago in order to upgrade the firmware on a Netgear router I …

This week's TechMail is Set up ISC’s dhcpd server which discusses setting up dhcpd, and how you can use it to assign static IP addresses -- using the convenience of DHCP-supplied configurations with the convenience of static IP addresses for client machines (and servers).

As usual, I take a day or two when a new Mandriva version is in RC status to install and play around with it. If you've been reading here for a while, you know that the machine I throw to the dogs is my Toshiba Libretto. Asus may have a …

Last week's TechMail tip was Encrypting and decrypting files with GnuPG, which covers some stuff about using gpg to deal with encryption of files (instead of just using gpg for mail).

This week's TechMail is Secure temporary files in Linux which discusses how to properly secure temporary files, using things like loopback filesystems, separate partitions for /tmp and using appropriate mount flags. It's pretty simplistic stuff, but can make a huge difference on the security of your system.

A few of us on vendor-sec have decided to pull some cross-vendor resources and we've put together a new informal organization, similar to vendor-sec, but for a more "general public". It's primarily a wiki of various security-related information and a mailing list for OSS vendors and authors to be able …

This came through as this week's techmail, although I'm not sure why.. this was originally posted back in June, but since that was before I started linking to the tips I figured I'd note it here anyways. Tuning the Linux kernel for more aggressive network throughput talks about changing some …

Found this link this morning, to a site with some nice cheatsheets that might be of interest to some people. There are cheetsheats for regexps, PHP, MySQL, CSS, HTML, etc. Single-page cheetsheats that can be used for easy reference. Found them on ilovejackdaniels.com. Might be worth checking out for …

I was bored tonight so I wrote a wrapper for hddtemp for Nagios monitoring. I have a bit of a quirky setup for Nagios where I run the local system checks on remote systems via netcat, ipsvd, and a script to handle the query. This allows me to monitor remote …