&tag(CentOS6, iptables); *目次 [#w2641da2] #contents *参考情報 [#k8d03981] -[[CentOS5]] -[[iptablesの設定:http://www.nina.jp/server/redhat/iptables/iptables.html]]…詳しい書式など。 -[[プチ・パケットフィルタリング - いますぐ実践! Linuxシステム管理 / Vol.067:http://www.usupi.org/sysad/067.html]] -[[CentOSをサーバーとして活用するための基本的な設定:http://tanaka.sakura.ad.jp/archives/001065.html]] -[[連載記事 「習うより慣れろ! iptablesテンプレート集」:http://www.atmarkit.co.jp/flinux/index/indexfiles/iptablesindex.html]] *設定 [#xda67776] -ssh/httpはどこからでも許可にした -/etc/sysconfig/iptables を編集する #pre{{ *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH-Firewall-1-INPUT - [0:0] -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p 50 -j ACCEPT -A RH-Firewall-1-INPUT -p 51 -j ACCEPT -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited COMMIT }} -iptablesを反映させる # /etc/init.d/iptables restart -iptablesの設定を確認しておく #pre{{ # iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination RH-Firewall-1-INPUT all -- anywhere anywhere Chain FORWARD (policy ACCEPT) target prot opt source destination RH-Firewall-1-INPUT all -- anywhere anywhere Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain RH-Firewall-1-INPUT (2 references) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT icmp -- anywhere anywhere icmp any ACCEPT esp -- anywhere anywhere ACCEPT ah -- anywhere anywhere ACCEPT udp -- anywhere 224.0.0.251 udp dpt:mdns ACCEPT udp -- anywhere anywhere udp dpt:ipp ACCEPT tcp -- anywhere anywhere tcp dpt:ipp ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:http ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:10100 REJECT all -- anywhere anywhere reject-with icmp-host-prohibited }} *参考情報 [#f4a4ab1e] -[[iptables]]を参照。