Misc

Myself, the World and Everything

New blog featuring Pelican

For years I used a working blog setup using Zope, Plone and Quills. Quills was neglected for a long time and made me stuck at the aging Plone 4.2. There seems to be some work done in the last year, but I did not really care. Also this whole …

Setting up Ceph the hard way

Almost all existing documentation tells me how to setup Ceph with one or two layers of abstration. This entry shows how to set it up by hand without needing root permissions.

Components

Ceph consists of two main daemons. One is the monitoring daemon, which monitors the health of the cluster …

LDAP, Insignificant Space and Postfix

For some, LDAP, just like X.500, is black magic. I won't argue against. Sometimes it really shows surprising behavior. It always makes sense, if you think about what LDAP is built for. One surprising behavior is the handling of the "Insignificant Space"

LDAP supports syntax and comparator methods. The …

Relaying e-mail over unreliable connections

I still prefer to handle all my mails at home. I got backup set-up on my own and have anything in direct access. This network is connected to the internet via an end-user DSL connection without a static IP-address and without any useful SLA. However relaying mails over such an …

DDoS against DNS-Servers

Today I found out that the DNS-Server at home is used for a DDoS against a DNS-Server. The attackers send a small query, "ripe.net ANY" in this case, with a faked sender IP. The DNS-Server answers with a much larger packet to the (faked) sender.

Because the domain is …

Booting Debian via AoE (ATA over Ethernet) and PXE

AoE is one of the protocols supported by Linux to access storage via network. It uses plain Ethernet for communication and includes a discovery mechanism to find all available targets. I use it to provide disk space to VMs running on different machines.

Next step is to boot via AoE …