Creating iptables Rulesets It's a great starting-point for ruleset development to see what ports are currently in-use, and consider that these may need to be opened through our firewall. To see what ports are in-use, and by what programs/services: hostname ~ # netstat -alnp Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fjviz.research.iat.sfu.ca%2Fwiki%2Findex.php%3Ftitle%3DHOWTO_Setup_iptables
"A (growing) collection of on-line wizards - for creating complex linux configuration files and scripts using simple web-enabled point-and-click methods. LinWiz://SimpleFirewall was the first of these - launched in March 2003, now replaced by LinWiz://PersonalFirewall and LinWiz://ServerFirewall."
ate-limit all incoming SSH connections to 8 in a one minute window. Normal users will have no trouble logging in, but the brute force attacks will be dropped, limiting the number of possible account combinations from unlimited, to 8.