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Downtime this week


Downtime of server later this week – nearly done 🙂

i have written a powerpoint which has now nearly 70 pages…
I need one day or more to reinstall the server.

  • Backup all databases
  • Backup the filesystem
  • Scan the backup for exploits ad spyware, crapware, rootkit
  • Reinstall the server with Suse 10.0 and Plesk 8.2
  • Increase security -> ssh only with PKI and protocol 2, permissions.d, appArmor, se linux
  • Review Plesk packages -> no PHP4, mySQL4 for example
  • Install required modules in Apache: mod_evasive, mod_security, mod_limitip, php5 runing with fastcgi and suexec
  • Maybe  install http://www.hardened-php.net/hardening_patch.14.html#what_is_the_hardening-patch
  • Domains and Subdomains will be newly created
  • Restore evrything -> all password will be changed
  • Alle administrator panel (Joomla, + plesk) will be with htaccess protected
  • Crontab -> chkrootkit, exploit.sh,  rkhunter,

So it will be a very intensive day…sorry for the downtime

From WikiPedia http://en.wikipedia.org/wiki/Downtime

Downtime refers to a period of time or a percentage of a timespan that a machine or system (usually a computer server) is offline or not functioning, usually as a result of either system failure (such as a crash) or routine maintenance. The opposite is uptime.

  • Maintenance downtimes have to be carefully scheduled in industries that rely on nearly 24-hour service, such as e-commerce, medical informatics, news reporting, and persistent online games. In many cases, system-wide downtimes can be averted using rolling upgrades.
  • Downtimes caused by system failures can have serious economic impact. To minimize these effects network monitoring can be used.


In Service Level Agreements, it is common to mention a percentage value (per month or per year) that is calculated by dividing the sum of all downtimes timespans by the total time of a reference time span (e.g. a month). 0% downtime means that the server was available all the time.

For Internet servers downtimes above 1% per year or worse can be regarded as unacceptable as this means a downtime of more than 3 days per year. For e-commerce and other industrial use any value above 0.1% is usually considered unacceptable.

About The Author

I worked with various Insurances companies across Switzerland on online applications handling billion premium volumes. I love to continuously spark my creativity in many different and challenging open-source projects fueled by my great passion for innovation and blockchain technology.In my technical role as a senior software engineer and Blockchain consultant, I help to define and implement innovative solutions in the scope of both blockchain and traditional products, solutions, and services. I can support the full spectrum of software development activities, starting from analyzing ideas and business cases and up to the production deployment of the solutions.I'm the Founder and CEO of Disruptr GmbH.

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