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online tutorials welcome to netnea skip to content network management security opensource network management security opensource home c rex services web security linux unix system management network management team charles bueche jiri dvorak christian folini nicolas mäder christian ramseyer simon studer franziska bühler marcela dvorakova about about us customers contact features c rex suite security courses apache modsecurity crs tutorials modsecurity crs rules inventory modsecurity crs newsletter latest posts the netnea crs upgrading plugin a real world migration the netnea crs upgrading plugin technical implementation details the new netnea crs upgrading plugin simplifying the migration from crs v3 to v4 blogs ansible 1 databases 1 linux 13 nms 21 python 2 security 43 uncategorized 2 online tutorials our website is one of the best known resources for modsecurity and owasp core rule set crs integration as well as apache configuration there is a curriculum with up to 12 individual tutorials english apache modsecurity crs tutorials this will teach you everything around the setup of a secure apache reverse proxy gateway server with modsecurity and crs on top our security expert christian folini also offers courses that cover these subjects you can choose between online and onsite courses there also used to be a translation of this curriculum into german and a minimal nginx modsecurity crs tutorial however this was discontinued you can still find them on archive org you may have to look up the individual pages one by one on the archive contact gartenstadtstrasse 29 ch 3097 liebefeld phone 41 31 974 08 08 email info netnea com tags ansible apache automation cisco core rules core rule set crs crs3 ddos django drupal enigma enigma2017 firewall geoip modrewrite modsecurity ncs nervecenter netdisco nftables nms oin opensource owasp top10 postgresql proxmox python 3 qos risks sampling mode security ssl ssl tls swiss cyber experts switzerland syslog tcpdump tls tshark typo3 ubuntu wireshark zenoss 2026 welcome to netnea powered by designed with the customizr theme