A small MPLS test network built with OpenBSD
A few months ago, I wrote a diff to simplify the calculation of ICMP extension header checksums in the OpenBSD kernel. It so happened that the code is only ...
Posts by Category
MPLS
OpenBSD
Testing Your Snort Rules Redux
Exactly four years ago, I blogged about testing Snort rules on OpenBSD. That post described a quick way to test if Snort has correctly loaded your rules and ...
Dissecting OpenBSD’s divert(4) Part 1: Introduction
For more than four years I have been using and tinkering with OpenBSD’s divert(4). At one point after OpenBSD 4.9 was released, I ran into an annoying bug in...
reallocarray() in OpenBSD: Integer Overflow Detection for Free
The upcoming OpenBSD 5.6 release introduces a new libc function called reallocarray(3) that extends realloc(3) with built-in integer overflow detection. In t...
A Sneak Peek at the Upcoming OpenBSD 5.6 Release
In exactly one month from now, OpenBSD 5.6 will be released on November 1, 2014 – like clockwork as always. But, you don’t have to wait until November 1 if y...
A small MPLS test network built with OpenBSD
A few months ago, I wrote a diff to simplify the calculation of ICMP extension header checksums in the OpenBSD kernel. It so happened that the code is only ...
Reinstalling all your OpenBSD packages with pkg_add’s fuzzy matching feature
Last week, in classic Lawrence fashion, I somehow hosed my OpenBSD ports tree while doing some crazy experiments. It got to the point where make package wou...
PF
Dissecting OpenBSD’s divert(4) Part 1: Introduction
For more than four years I have been using and tinkering with OpenBSD’s divert(4). At one point after OpenBSD 4.9 was released, I ran into an annoying bug in...
Snort
Testing Your Snort Rules Redux
Exactly four years ago, I blogged about testing Snort rules on OpenBSD. That post described a quick way to test if Snort has correctly loaded your rules and ...
An easy way to test your Snort rules
UPDATE: An updated version of this blog post is now available!
divert
Dissecting OpenBSD’s divert(4) Part 1: Introduction
For more than four years I have been using and tinkering with OpenBSD’s divert(4). At one point after OpenBSD 4.9 was released, I ran into an annoying bug in...
httpd
Testing Your Snort Rules Redux
Exactly four years ago, I blogged about testing Snort rules on OpenBSD. That post described a quick way to test if Snort has correctly loaded your rules and ...
programming
reallocarray() in OpenBSD: Integer Overflow Detection for Free
The upcoming OpenBSD 5.6 release introduces a new libc function called reallocarray(3) that extends realloc(3) with built-in integer overflow detection. In t...
security
reallocarray() in OpenBSD: Integer Overflow Detection for Free
The upcoming OpenBSD 5.6 release introduces a new libc function called reallocarray(3) that extends realloc(3) with built-in integer overflow detection. In t...