{"id":5270,"date":"2013-08-30T23:40:29","date_gmt":"2013-08-30T14:40:29","guid":{"rendered":"https:\/\/polaire.org\/r-top\/2013\/08\/vpsiptables.html"},"modified":"2013-08-30T23:40:29","modified_gmt":"2013-08-30T14:40:29","slug":"vpsiptables","status":"publish","type":"post","link":"https:\/\/polaire.org\/r-top\/2013\/08\/vpsiptables.html","title":{"rendered":"\u3055\u304f\u3089\u306eVPS\u3067iptables\u306e\u8a2d\u5b9a"},"content":{"rendered":"

\u5951\u7d04\u3057\u3066\u74b0\u5883\u6574\u5099\u3057\u3066\u3001\u3088\u3046\u3084\u304fVPS\u304c\u5b89\u5b9a\u7a3c\u50cd\u306b\u5165\u308a\u307e\u3057\u305f\u3002
\n\u5099\u5fd8\u9332\u3068\u3057\u3066\u3001\u3044\u308d\u3044\u308d\u3084\u3063\u305f\u8a2d\u5b9a\u5468\u308a\u306e\u3053\u3068\u3092\u30e1\u30e2\u3057\u3066\u3044\u304d\u307e\u3059\u3002
\n\u4eca\u65e5\u306fiptables\u306e\u8a2d\u5b9a\u306b\u3064\u3044\u3066\u3002
\n\u300c\u3055\u304f\u3089\u306eVPS\u300d\u300ciptables\u300d\u3068\u304b\u3067\u691c\u7d22\u3059\u308b\u3068\u3044\u308d\u3044\u308d\u306a\u30b1\u30fc\u30b9\u304c\u30d2\u30c3\u30c8\u3057\u307e\u3059\u304c\u3001\u4e0d\u5fc5\u8981\u3068\u3082\u601d\u3048\u308b\u8a2d\u5b9a\u304c\u3055\u3082\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u3088\u3046\u306b\u8a9e\u308a\u7d99\u304c\u308c\u3066\u3044\u305f\u308a\u3059\u308b\u306e\u3067\u3001\u3053\u3053\u3067\u306f\u305d\u306e\u8fba\u306b\u3064\u3044\u3066\u3082\u8efd\u304f\u7a81\u3063\u8fbc\u3093\u3067\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

:RH-Firewall-1-INPUT – [0:0]<\/p><\/blockquote>\n

\u305f\u3044\u3066\u3044\u306e\u65b9\u304c\u3053\u306e\u540d\u524d\u3067\u30c1\u30a7\u30fc\u30f3\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u306f\u3063\u304d\u308a\u8a00\u3063\u3066\u3044\u308a\u307e\u305b\u3093\u3002\u3088\u307b\u3069\u8907\u96d1\u306a\u3053\u3068\u3092\u3057\u306a\u3044\u9650\u308a\u30c1\u30a7\u30fc\u30f3\u306f\uff11\u672c\u3067\u6e08\u307f\u307e\u3059\u304b\u3089\u3001\u308f\u3056\u308f\u3056\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u306f\u306a\u3044\u3068\u8003\u3048\u307e\u3059\u3002<\/p>\n

-A RH-Firewall-1-INPUT -p 50 -j ACCEPT
\n-A RH-Firewall-1-INPUT -p 51 -j ACCEPT <\/p><\/blockquote>\n

50\u756a\u300151\u756a\u3068\u3082IPsec\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u7528\u3044\u3089\u308c\u308b\u30dd\u30fc\u30c8\u3067\u3059\u3002VPS\u3067IPsec\u3092\u4f7f\u308f\u306a\u3044\u9650\u308a\u3001\u3053\u306e\u5b9a\u7fa9\u306f\u3044\u308a\u307e\u305b\u3093\u3002<\/p>\n

-A RH-Firewall-1-INPUT -p udp –dport 5353 -d 224.0.0.251 -j ACCEPT <\/p><\/blockquote>\n

\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8DNS\u3092\u901a\u3059\u5834\u5408\u306e\u8a2d\u5b9a\u3067\u3059\u304c\u3001\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3092\uff11\u3064\u3057\u304b\u6301\u305f\u306a\u30441\u53f0\u306e\u4eee\u60f3\u30b5\u30fc\u30d0\u306b\u5bfe\u3057\u3066\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u304b\u3069\u3046\u304b\u3002\u6b63\u76f4\u3001\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

-A RH-Firewall-1-INPUT -p udp -m udp –dport 631 -j ACCEPT
\n-A RH-Firewall-1-INPUT -p tcp -m tcp –dport 631 -j ACCEPT\n<\/p><\/blockquote>\n

631\u756a\u306fInternet Printing Protocol\u3001\u3064\u307e\u308a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u8d8a\u3057\u306b\u30d7\u30ea\u30f3\u30bf\u3092\u4f7f\u3046\u305f\u3081\u306e\u30dd\u30fc\u30c8\u3067\u3059\u3002VPS\u306b\u30d7\u30ea\u30f3\u30bf\u306f……\u3064\u3044\u3066\u306a\u3044\u3067\u3059\u3088\u306d\uff1f\u3000\u3053\u308c\u3082\u3044\u308a\u307e\u305b\u3093\u3002
\n\u3068\u307e\u3042\u3001\u307e\u305a\u306f\u4e0d\u8981\u306a\u8a2d\u5b9a\u304b\u3089\u8aac\u660e\u3057\u3066\u307f\u307e\u3057\u305f\u3002
\n\u7d9a\u3044\u3066\u306f\u3001\u3053\u308c\u306f\u8a2d\u5b9a\u3057\u3068\u3044\u305f\u65b9\u304c\u3044\u3044\u3093\u3058\u3083\u306a\u3044\u304b\u3001\u3068\u3044\u3046\u8a2d\u5b9a\u306b\u3064\u3044\u3066\u3002<\/p>\n

-A INPUT -i eth0 -p all -s 127.0.0.1 -j DROP
\n-A INPUT -i eth0 -p all -s 10.0.0.0\/8 -j DROP
\n-A INPUT -i eth0 -p all -d 10.0.0.0\/8 -j DROP
\n-A INPUT -i eth0 -p all -s 172.16.0.0\/12 -j DROP
\n-A INPUT -i eth0 -p all -d 172.16.0.0\/12 -j DROP
\n-A INPUT -i eth0 -p all -s 192.168.0.0\/16 -j DROP
\n-A INPUT -i eth0 -p all -d 192.168.0.0\/16 -j DROP\n<\/p><\/blockquote>\n

\u666e\u901a\u306a\u3089\u5916\u90e8\u306e\u9001\u4fe1\u5143\u304b\u3089\u30ed\u30fc\u30ab\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u540d\u4e57\u308b\u30d1\u30b1\u30c3\u30c8\u304c\u3084\u3063\u3066\u304f\u308b\u306a\u3093\u3066\u3053\u3068\u306f\u306a\u3044\u306e\u3067\u3059\u304c\u3001\u304d\u3061\u3093\u3068\u9589\u3058\u3066\u304a\u304b\u306a\u3044\u3068IP Spoofing\u306a\u3069\u306b\u3088\u3063\u3066\u601d\u308f\u306c\u7a74\u304c\u958b\u3044\u3066\u3057\u307e\u3046\u3053\u3068\u3082\u3042\u308a\u5f97\u307e\u3059\u3002\u306a\u306e\u3067\u3001\u9589\u3058\u307e\u3059\u3002<\/p>\n

-A INPUT -d 255.255.255.255 -j DROP
\n-A INPUT -d 224.0.0.1 -j DROP\n<\/p><\/blockquote>\n

\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u3001\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u5411\u3051\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u62d2\u5426\u3057\u307e\u3059\u3002\u4eee\u60f3\u30b5\u30fc\u30d0\u306b\u305d\u3093\u306a\u3082\u306e\u3092\u9001\u308a\u3064\u3051\u3089\u308c\u3066\u3082\u56f0\u308a\u307e\u3059\u306e\u3067\u3002<\/p>\n

-A INPUT -p tcp –dport 113 -j REJECT –reject-with tcp-reset<\/p><\/blockquote>\n

113\u756a(IDENT)\u3078\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5bfe\u3057\u3066\u5373\u5ea7\u306b\u304a\u65ad\u308a\u3092\u51fa\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u660e\u78ba\u306b\u62d2\u5426\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3001\u4e00\u90e8\u306e\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u7b49\u304cIDENT\u3092\u8981\u6c42\u3057\u3066\u304d\u305f\u6642\u306b\u76f8\u624b\u3092\u5f85\u305f\u305b\u3066\u3057\u307e\u3046\u2192\u30b5\u30fc\u30d0\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u4f4e\u4e0b\u306b\u7e4b\u304c\u308a\u307e\u3059\u3002<\/p>\n

-A INPUT -i eth0 -f -j DROP<\/p><\/blockquote>\n

\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u30d1\u30b1\u30c3\u30c8\u3092\u62d2\u5426\u3057\u307e\u3059\u3002\u3053\u306e\u8fba\u306f\u304a\u597d\u307f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u4f55\u3068\u306a\u304f\u6c17\u6301\u3061\u60aa\u3044\u306e\u3067\u3002<\/p>\n

-A INPUT -i eth0 -p tcp ! –syn -m state –state NEW -j DROP<\/p><\/blockquote>\n

\u30ed\u30b0\u306b\u6b8b\u3089\u306a\u3044\u30dd\u30fc\u30c8\u30b9\u30ad\u30e3\u30f3\u3001\u3044\u308f\u3086\u308b\u300c\u30b9\u30c6\u30eb\u30b9\u30b9\u30ad\u30e3\u30f3\u300d\u3092\u62d2\u5426\u3057\u307e\u3059\u3002\u305d\u3093\u306a\u3053\u3068\u4ed5\u639b\u3051\u3066\u304f\u308b\u8f29\u306f\u3042\u304b\u3089\u3055\u307e\u306b\u602a\u3057\u3044\u3067\u3059\u304b\u3089\u3002<\/p>\n

-A INPUT -i eth0 -p tcp –dport (SSH\u306e\u30dd\u30fc\u30c8) -m state –state NEW -m recent –set –name SSH
\n-A INPUT -i eth0 -p tcp –dport (SSH\u306e\u30dd\u30fc\u30c8) -m state –state NEW -m recent –update –seconds 60 –hitcount 8 –rttl –name SSH -j DROP<\/p><\/blockquote>\n

\u3061\u3087\u3063\u3068\u8907\u96d1\u306a\u3093\u3067\u3059\u304c\u3001\u3056\u3063\u304f\u308a\u8aac\u660e\u3059\u308b\u306860\u79d2\u9593\u306b8\u56deSSH\u306e\u30dd\u30fc\u30c8\u306b\u63a5\u7d9a\u3057\u3066\u304d\u305f\u3089\u62d2\u5426\u3059\u308b\u3001\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u8981\u3059\u308b\u306b\u3001SSH\u306b\u5bfe\u3057\u3066\u7dcf\u5f53\u305f\u308a\u653b\u6483\u3055\u308c\u308b\u306e\u3092\u9632\u3050\u308f\u3051\u3067\u3059\u3002\u6700\u8fd1\u7dcf\u5f53\u305f\u308a\u306f\u6d41\u884c\u3063\u3066\u307e\u3059\u304b\u3089\u3001\u3053\u3053\u306f\u3072\u3068\u3064\u7528\u5fc3\u306e\u305f\u3081\u306b\u3002
\n\u3068\u3044\u3046\u308f\u3051\u3067\u3001\u307e\u3068\u3081\u308b\u3068\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n

*filter
\n:INPUT ACCEPT [0:0]
\n:FORWARD ACCEPT [0:0]
\n:OUTPUT ACCEPT [0:0]
\n-A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT
\n-A INPUT -p icmp -j ACCEPT
\n-A INPUT -i lo -j ACCEPT
\n-A INPUT -i eth0 -p all -s 127.0.0.1 -j DROP
\n-A INPUT -i eth0 -p all -s 10.0.0.0\/8 -j DROP
\n-A INPUT -i eth0 -p all -d 10.0.0.0\/8 -j DROP
\n-A INPUT -i eth0 -p all -s 172.16.0.0\/12 -j DROP
\n-A INPUT -i eth0 -p all -d 172.16.0.0\/12 -j DROP
\n-A INPUT -i eth0 -p all -s 192.168.0.0\/16 -j DROP
\n-A INPUT -i eth0 -p all -d 192.168.0.0\/16 -j DROP
\n-A INPUT -d 255.255.255.255 -j DROP
\n-A INPUT -d 224.0.0.1 -j DROP
\n-A INPUT -p tcp –dport 113 -j REJECT –reject-with tcp-reset
\n-A INPUT -i eth0 -f -j DROP
\n-A INPUT -i eth0 -p tcp ! –syn -m state –state NEW -j DROP
\n-A INPUT -i eth0 -p tcp –dport (SSH\u306e\u30dd\u30fc\u30c8) -m state –state NEW -m recent –set –name SSH
\n-A INPUT -i eth0 -p tcp –dport (SSH\u306e\u30dd\u30fc\u30c8) -m state –state NEW -m recent –update –seconds 60 –hitcount 8 –rttl –name SSH -j DROP
\n-A INPUT -m state –state NEW -m tcp -p tcp –dport (SSH\u306e\u30dd\u30fc\u30c8) -j ACCEPT
\n-A INPUT -m state –state NEW -m tcp -p tcp –dport 25 -j ACCEPT
\n-A INPUT -m state –state NEW -m tcp -p tcp –dport 110 -j ACCEPT
\n-A INPUT -m state –state NEW -m tcp -p tcp –dport 143 -j ACCEPT
\n-A INPUT -m state –state NEW -m tcp -p tcp –dport 587 -j ACCEPT
\n-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT
\n-A INPUT -j REJECT –reject-with icmp-host-prohibited
\n-A FORWARD -j REJECT –reject-with icmp-host-prohibited
\nCOMMIT<\/p><\/blockquote>\n

\u958b\u3051\u3066\u3042\u308b\u30dd\u30fc\u30c8\u306b\u3064\u3044\u3066\u306f\u304a\u597d\u307f\u3067\u5897\u3084\u3059\u306a\u308a\u6e1b\u3089\u3059\u306a\u308a\u3057\u3066\u4e0b\u3055\u3044\u3002\u3068\u308a\u3042\u3048\u305a\u3001\u30e1\u30fc\u30eb\u3068Web\u3092\u3084\u308b\u306e\u3067\u3042\u308c\u3070\u3053\u308c\u3067\u5145\u5206\u304b\u3068\u601d\u3044\u307e\u3059\u3002
\niptables\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u3093\u306a\u3068\u3053\u308d\u3067\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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