I was parsing through some of the logs on my new server tonite and I saw some unsuccessful ssh connection on ipv6. I thought I would mention quickly how you can disable listening on ipv6. ListenAddress The /etc/ssh/sshd_config file configures how your ssh daemon should run. By default it is likely listening on 0.0.0.0 (all… Read More »
This post is a request for information, tutorials, documentation, etc on using SELinux with Ubuntu or Debian. I am very interested in deploying it and documenting it (as I tend to do here, of course) but I’m not finding much information. If you have: Been able to deploy it on Ubuntu / Debian Can refer… Read More »
I thought today I would outline a few tips on network security with tcpwrappers or, as you’re probably more familiar, the hosts.allow and hosts.deny files. How you can use them? What applications are compatible? etc. I know network security is a really broad topic, but this will hopefully be enough to get you going and… Read More »
Update : Encypted root file system option now available at installation in Ubuntu 7.10. See Install Time Ubuntu Encryption for more information. This last week I’ve been very interested in encryption. If you missed it you might be interested in my post on encrypting files or emails with GPG. In this tutorial I wanted to… Read More »
This post is in part an update to my previous post on resetting the gnome keyring, and partly due to my continued laziness, efficiency push. I want my machine to do everything for me anymore. The less tedious work I have to do the more actual work I can get done, right? This post will… Read More »
Today’s post isn’t so much a tutorial but more of a discussion or educational topic on grub. It was inspired by the original post here and continued discussion in the comments. I thought I would outline some suggestions on securing the grub boot loader and why Ubuntu adding a “rescue mode” entry in grub is… Read More »
SSH, what a wonderful tool. One of the crowning achievements of the modern world, with a hundred and one different uses. One of my favorite being that of tunnelling and proxying connections over it’s secure, encrypted goodness. I thought I’d outline how to setup a proxy system using SSH that can be used by any… Read More »
I was discussing VNC this afternoon with some students and the question came up on how to secure VNC. As you may have noticed most network protocols do not have much for built in security. Many rely on other programs for their network security needs, such as ssh. This is also the case with VNC.… Read More »
I just discovered something today that I should have looked for months ago. I got curious after doing a lab here in the RH253 (RHEL Network Services and Security) class about whether or not Synergy does any type of encryption over the wire. What I found out is actually NO. To test this I loaded… Read More »
If you’ve used your Ubuntu machine for more than a week you’ve probably run into the sudo command. Particularly if you’ve followed any of my previous tutorials you’ve used it. Sudo allows you to run superuser commands on your machine, without needing a complete superuser account. Now what happens when you have another user on… Read More »