Papers / HowTo

 

Sometimes you just need a tiny hint to solve your problem. Here the things we found out - in most cases the hard way...

Firewalls / Forensics

Firewall-Types: stateful? inspection? proxy?
Here you'll get a brief overview over the different types of firewall architectures.

HowTo send CheckPoint FW1 logs to syslog
Checkpoint's Firewall-1 does not offer sending its logs to a standard syslog by default. Here is a way around it.

HowTo mirror a partition or complete PC via network - binary 1:1 copy
Imagine you get the task to quickly set up a number of identical workstations regardless installed OS(es) or filesystems. Here's how to do with on-board tools.

HowTo duplicate a Linux-PC or Patition via network - fast
Imagine you get the task to quickly set up a number of hardware-wise identical workstations. Unfortunately time is running out, the PCs have different hard disks or filesystem types, or you want to keep the other individual partitions or have differing partition sizes on your target PC. Here's how to do with on-board tools.

Hosting / Mail Protection

HowTo run Greylisting (on Debian/GenToo) step-by-step
Greylisting (http://www.greylisting.org/) is a (relatively) new, resource-preserving measure against SPAM and virus mails, raising the barrier quite a bit and reducing the unwanted data traffic by a few orders of magnitude.
This is a step-by-step guide.

Assorted Stuff

Product History
Sometimes products just seem to be somehow strangely familiar. Maybe it is because you worked with its predecessor under a different name or brand. Or it is based upon some well known software. Thus here a list of products and its predecessors.

HowTo check the serial number on a EURO note
Here's how to check the serial number on an EURO bank note, including an online JavaScript calculator.
(Check der Seriennummer für Euro-Banknoten)

HowTo read GET requests in JavaScript
You don't always need CGI or Apache-Modules (e.g. PHP) to evaluate forms and generate a new page. This is a generic example on how to do URL stuff in JavaScript.

Joke-RfCs and -HowTos
While a "normal" RfC (Request for Comments) usually defines internet standards and protocols, there are a number of RfCs and HowTos published on 1st of April - or for a similar purpose. Read and have fun...

Archived Docs (no longer of much use)

HowTo run ClamAV Anti Virus on a low memory system
This recipe lost its edge when startup times slowed down too much.