Linux
My adventure upgrading RHEL5 to RHEL6
Well, I’ve begun the migration and probably picked the hardest machine to start with. One of my goals here was to do a clean migration from a Red Hat Enterprise Linux 5 box to a Red Hat Enterprise Linux 6 box for a specific set of services, and to intentionally have SELinux in enforcing mode [...]
AIDE+gpg 1.0.2 released
As part of my work migrating to Red Hat Enterprise Linux 6, I found that AIDE+gpg does not work with GnuPG2 (previously, Red Hat Enterprise Linux 5 and Annvix only used GnuPG version 1). The AIDE+gpg scripts now work with GnuPG version 2, and a new version is available from the AIDE+gpg project page. I [...]
Use Fail2ban to blacklist IP addresses and alert you to attacks
This week’s techmail was Use Fail2ban to blacklist IP addresses and alert you to attacks which takes a look at the fail2ban tool. Fail2ban is a program that will watch log files and if it notices failed login attempts on any configured services (ssh, smtp, etc.) it will ban that IP address for a certain [...]
Obtaining network information with netstat
Last week’s techmail was Obtaining network information with netstat where we take a look at some of the nifty little things you can do with the netstat program including listing which ports are being actively listened to and by which programs and what active connections there are (both inbound and outbound). netstat is a really [...]
Tips and tricks to help you do more with OpenSSH
Last week’s techmail was Tips and tricks to help you do more with OpenSSH which is a followup to the previous tip that talked about OpenSSH key management. This one gives you a few one-liner tips to stimulate the imagination (yet are useful on their own) with the kinds of things you can do with [...]
Is Your Son a Computer Hacker?
A member from my local LUG posted this, and it’s a gem. Highly amusing, especially for anyone that considers themself a hacker and wants to see what the defining characteristics of a hacker was 10 years ago. Whether this was something serious or something tongue in cheek, it’s an amusing read nonetheless. Is Your Son [...]