Firewall

http://www.tomshardware.com/forum/12532-42-iptables-access-local-server-external How to do “NAT Loopback” with IPtables

http://www.tomshardware.com/forum/12532-42-iptables-access-local-server-external How to do “NAT Loopback” with IPtables

http://www.tomshardware.com/forum/12532-42-iptables-access-local-server-external How to do “NAT Loopback” with IPtables

http://www.cyberciti.biz/faq/rhel-fedora-centos-httpd-mod_security-configuration/ yum install mod_security – i.e. simple instruction how to install mod_security - an open source Web Application Firewall

http://www.cyberciti.biz/faq/rhel-fedora-centos-httpd-mod_security-configuration/ yum install mod_security – i.e. simple instruction how to install mod_security - an open source Web Application Firewall

http://marc.info/?l=netfilter&m=120721841603406&w=2 explanation on why `-m state –state <>’ does not work for IPv6 in older kernels

http://forum.mikrotik.com/viewtopic.php?f=9&t=45209 A thread at mikrotik forum that gives some idea how to recognize skype traffic at the border of your network

http://www.greensql.net/ SQL-proxy/filtering software for MySQL and PostgreSQL databases, used to prevent SQL-injection-like attacks, filter-out dangerous SQL, etc

http://abills.net.ua/wiki/doku.php?id=abills:docs_03:diagram:ru *nix bases network traffic accounting system

http://tservice.net.ru/~s0mbre/old/?section=projects&item=carp CARP is an improved version of the Virtual Router Redundancy Protocol (VRRP) standard. It has more features than Cisco’s HSRP. There is another[user-space] implementation called ucarp. This version does not compartable with OpenBSD CARP.