"Kinryuzan Temple in Asakusa" by Horoshige II, from the series "Famous Places in the Eastern Capital", mid-19th Century

Our technological references

  • Hardware: HP (ProLiant, Moonshot), Dell, SuperMicro, Soekris, Sun/Oracle SPARC, Silicon Graphics;
  • datacenter technological management;
  • free UNIX operating systems:
    • GNU/Linux : Debian, Gentoo, Red Hat, Slackware, Ubuntu;
    • FreeBSD;
    • OpenBSD;
    • ZSH and Bash shells;
    • tmux, vim, sed, grep, etc.;
  • network:
    • firewalls: Packet Filter, pfSense, OpnSense, NetFilter/IPTables;
    • VPN: IPsec, OpenVPN;
    • SSH (OpenSSH, PuTTY), DNS/DNSSEC (ISC Bind, NSD, Unbound), DHCP, PXE booting, etc.;
    • console access: HP iLo, IPMI, Sun LOM/ALOM/ILOM;
    • load balancing and high availability : KeepAlived, HAProxy, relayd;
    • Cisco appliances management;
  • security:
    • general cryptography, TLS/SSL, certification authorities (PKI, CACert, Let’s Encrypt);
    • OpenSSL/LibreSSL, GnuPG, etc.;
    • Network IDS/IPS (Suricata) and Host-based IDS/IPS (rkhunter, OSSEC);
    • penetration testing: OpenVAS;
  • Web:
    • Apache HTTPd, Nginx, Varnish, HAProxy;
    • PHP, Ruby on Rails, Java, Apache Tomcat;
    • DotClear, WordPress, DokuWiki, MediaWiki, StatusNet, ownCloud, NextCloud, Tiny-Tiny RSS, Mattermost, webalizer, Awstats, Piwik/Matomo, etc.;
  • e-mail:
    • SMTP/SMTPS, POP/POPS, IMAP/IMAPS, SPF, DKIM;
    • Postfix, Dovecot, spamd;
  • databases: PostgreSQL, MySQL;
  • monitoring: SNMP, Nagios/Centreon, PNP4Nagios, Shinken, Graphite;
  • backup: Bacula, Bareos;
  • configuration management: Puppet, Foreman, Rundeck, Ansible, AWX/Tower;
  • development tools: Git, Gitlab, Mercurial, MantisBT, Jenkins.