Happy System Administrator Appreciation Day to every admin out there. (If you don’t what I’m talking about take a look at
The latest update to a software a customer uses promised a significant performance improvement as well as an interesting new feature.
So I was asked to install the new version on a test server. The performance is much better then before but the new feature gave me headaches. Every time I wanted to enable this feature I got a message that I should install a licenses in order to use it. Nothing about this in the documentation. So I decided to just take a look at the demo mode. It looked okay but it wasn’t the real thing. A real live test was what we wanted.
After the lunch break someone from the customer asked me about the exact message. I clicked on enable and the message was gone. I was able to activate the feature and use it.
Only draw back: 1.7GB of RAM for a firewall management GUI on a test system with very few firewalls, log information and rules.
As you might have noticed almost everybody is talking about a world wide economic crisis. One might thing, that in times like these company’s would be eager to sell you their products.
Well that’s what I thought about a month ago too. A customer asked me to take a look a closer look some specific products. The customer had an evaluation version of one of these products, I had worked with the second one a while back and I contacted the third vendor via a web form. (At that time I thought it’s one of those ‘”register yourself and download the software” sites.) After filling out the form answering numerous question the website told me that I will soon be contacted by someone from their sales department.
They did contact me! About 10minutes ago. Without even apologizing for the delay. They also did send a from (pdf) that I should fill out and fax to them. Well no thanks.
The numbers for June: 1239 (IPv4):126(IPv6)
Because of the serious lack of IPv6 geek t-shirts I just designed a few and opened a shop: http://ipv6.spreadshirt.net/.
I just added a new page “Slides and Papers” to this BLOG where you can find links to slides of my talks.
I added my slides from LinuxTag 2009 about IPv6 Planning (English) and my slides from iX IPv6-Kongress about IPv6 Routing.
Many people I know run a dedicated server to run web-, DNS- and mail servers. In this article I’ll show you how to bring IPv6 to your server. The next part will concentrate on enabling IPv6 for different services like web and mail. As operating system I’ll concentrate on Debian GNU/Linux. I’ll also describe only the service I use: BIND9, Apache2, OpenSSH, Postfix and Dovecot.
If your no familar with IPv6 you should first learn the basics: http://en.wikipedia.org/wiki/IPv6
iptables will not filter IPv6 packets. For IPv6 you’ll have to use
ip6tables. So if you activate IPv6 on a host without configuring your services correctly and / or setting up
ip6tables rules you might have some serious security problems.
You should also think before blindly following what I’m writing. I maybe wrong and you might screw up your whole serer.