One of linux server contains rule set like these: iptables -A INPUT -p tcp --syn --dport 80 - m connlimit --conlimit-above 20 -j DROP iptables -A INPUT -m recent --name KIN -rcheck --seconds 300 -j DROP iptables -A INPUT -p tcp --syn --dport 80 -m connlimit --connlimit-above 5 -m recent --name KIN -set -j DROP
simply means, drop ip try to connect tcp port 80 over 20 connections. when it happens, drop ip for 5 minutes. iptables -A INPUT -p udp --dport 53 -m length --length 512:65535 -j DROP briefly, drop ip try to connect udp port 53 which packet length is 512 ~ 65535. I want using those rules on freebsd servers, but I don't know those kind of sophisticated functions of ipfw. Is that possible freebsd? Let me share your knowledge. _______________________________________________ freebsd-ipfw@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw To unsubscribe, send any mail to "[EMAIL PROTECTED]"