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Posted

Axel Gembe

Objective:

Network Administrator / Programmer

Summary

  • Experiences with administering and securing Linux, Windows, and BSD based networks
  • Experience in Visual C++, GNU C++, Pascal, BASIC, with focus on network, system and secure programming
  • Ability to develop custom security solutions, based on free IDS systems and self-written anomaly detection systems/firewalls
  • Ability to audit networks/software for common problems like buffer overflows, etc...
  • Teamwork with multiple security teams and/or version control using SVN, CVS, VSS and a little Perforce
  • Experience with cross-platform development on Win32/Linux and knowledge of the issues involved


Experience

  • Network Administration / Security:
  • Network Administrator at [REDACTED] since 5 years. During that time not a single security issue occurred, though numerous attempts were observed.
  • Server Administrator at PCom (German ISP) for 1 year, and for several other small companies.
  • Created an anomaly detection system and a firewall for securing those companies, based on iptables, tepdump and some self-written analysis software.
  • Contributed numerous fixes for the software I use to the Debian project, for example exim, debianutils, taper and vrum.
  • Experience with setting up 99% uptime services with full backup, UPS, backup servers and RAID disks.
  • Wrote various log parsing tools to diagnose fire detection systems. Implemented in a CGI that outputs a graphical representation of the data streams.
  • Experience with setting up secure VPNs using VTum or IPSec

Programming:

  • Wrote a remote administration toolkit that can be used to notify about unusual events automatically or just administering the server
  • Wrote a game engine that can display terrains based on the ROAM paper ( by Mark Duchineau, available here ), has its own windowing system, and can make use of 3DNow! processors. This is more of a test, cause I only got a test game for the engine.
  • Wrote exploits for various flaws like buffer overflows, integer overflows and more. Also I wrote various tools to automatically test software for these flaws.
  • Wrote a fast file synchronization algorithm using MD5 sums, which is also used in the SourceSafe client I wrote.
  • Ability to quickly learn new programming language

Relevant Work History

  • 1999-pres. Network Administrator at [REDACTED] Germany
  • 1997-1998 Server Administrator at PCom, Germany
  • 1995-1998 Freelance webdesigner / programmer for all kinds of projects

Education

  • I don't really have any relevant education, in school I only learned really odd stuff, like how computers in the 80ies worked or Turbo Pascal

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