Jens’ BLOG

RIPE Labs has an interesting article about SPAM over IPv6.

For the Dutch readers (I any): XS4ALL is looking for beta testers to try native IPv6 over ADSL. See http://www.xs4all.nl/klant/ipv6/ for details.

When will the big German providers start?

Swaks, the Swiss Army Knife SMTP is one of the most powerful tools when it comes to troubleshooting and testing SMTP connections. Yes I know, telnet is also fine but after typing EHLO for the 20th time you might want something different.

Here is an example:


swaks --to foo@example.com --from bar@example.org --auth PLAIN --auth-user foo@example.com --auth-password !foo --server mail.example.org


There are lot of different options for all kinds of things including customized headers, etc.

Last year I bought a small Atom based computer from a well known vendor. Back than I used it as quick and dirty terminal server using Debian, ser2net and some USB2SERIAL dongles.

My server @home needed to be replaced an this little box was the obvious choice. So I installed what I needed and started to rsync my data from the old machine. After some time rsync terminated with an strange error message. It was late and I just started rsync again and got to bed. The next morning I was greeted by a kernel panic. . So I decided to run memtest86+. I started the coffee maker, took a shower, got something for breakfast and looked at the computer screen again. After about 25min memtest had found several errors.

So I opened a support call with the vendor and was asked to send the box to them. I did so and put a piece of paper onto the box to send it back to a different address (which they ignored).

I was away for about two weeks and today had the chance to pick up the package from my neighbors. I found a note saying that they could find anything wrong with the hardware and that they had reinstalled the operating system. Well probably anything without a GUI isn’t an operating system.

I’m just running memtest again and guess what. After a couple of minutes it found some defective RAM again.

I hope the other vendor doesn’t claim software problems for broken display on my Netbook.

It’s always a problem to keep all your ACLs in a network coherent. Recently I was made aware of a small tool form google which makes managing ACLs on Cisco, Juniper and Linux much easier to handle.

Take a look at Capirca.

Some features, like IPv6 ACL support for Cisco is still missing, but it looks quite promising.

Last Saturday I’ve given my usual presentation on IPv6 in Chemnitz. There where over 200 people in the room which shows that IPv6 is becoming more and more an interesting topic

I received a lot of positive feedback. Yes I know: I was a little bit fast and there where many things I hadn’t have time to explain in more detail. I think of workshop for the next conference.

Last but not least: I’d like to thank the organizers for the great conference and the nice weekend.

Recently some SPAM got through my filter. Send from a an mail account from a big company running a search engine and also providing free email (not the one starting with G).

So looked up the abuse contact and forwarded the mail including all headers. Now they ask me to copy’n'paste the mail into a web form. Not the whole mail at once, no header and body have to be separated and they also wanted me to figure out which user id I’m complaining against.

Y*: this is a way to limit the work on your side. If one always has to put so much work into a spam complaint nobody will complain.

Some year old but I just found it a couple of days ago.

(via)

… at least when pasted into pidgin.

About a month from now I’ll be teaching a 3 day IPv6 course at the Open Source School in Munich. Language will be German.

The course will cover the following topics: IPv6 basics, configuration of Linux and different services (e.g.Bind, Apache, SSH, …) routing, firewalling, troubleshooting and IPv6 planning and network design.

There are some more courses scheduled for the rest of the yes