*******************************************************************<\/p>\n\n\n\n
iptables\u3067\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\uff08\u906e\u65ad\uff09\u3059\u308b\u57fa\u672c\u8a2d\u5b9a\u306f\u3001\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc\u30c8\u306b\u5bfe\u3059\u308b\u901a\u4fe1\u3092DROP\u307e\u305f\u306fREJECT\u30bf\u30fc\u30b2\u30c3\u30c8\u3067\u5236\u9650\u3057\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u30b3\u30de\u30f3\u30c9\u306fiptables -A INPUT -s [IP\u30a2\u30c9\u30ec\u30b9] -j DROP\uff08\u7279\u5b9a\u306eIP\u304b\u3089\u306e\u901a\u4fe1\u3092\u7834\u68c4\uff09\u3067\u3059\u3002\u8a2d\u5b9a\u306f\u4e00\u6642\u7684\u306a\u305f\u3081\u3001\u6c38\u7d9a\u5316\u306b\u306fservice iptables save\u3092\u4f7f\u7528\u3057\u307e\u3059<\/p>\n\n\n\n
1. \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b
\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f8b: 192.168.1.100\uff09\u304b\u3089\u306e\u5168\u901a\u4fe1\u3092\u7834\u68c4\uff08DROP\uff09\u3057\u307e\u3059\u3002
bash
sudo iptables -A INPUT -s 192.168.1.100 -j DROP<\/p>\n\n\n\n
2. \u7279\u5b9a\u306e\u30dd\u30fc\u30c8\uff08\u30b5\u30fc\u30d3\u30b9\uff09\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b
\u7279\u5b9a\u306eIP\u304b\u3089\u306e\u7279\u5b9a\u306e\u30dd\u30fc\u30c8\uff08\u4f8b: 22\u756a\uff1aSSH\uff09\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
bash
sudo iptables -A INPUT -s 192.168.1.100 -p tcp –dport 22 -j DROP<\/p>\n\n\n\n
3. IP\u30a2\u30c9\u30ec\u30b9\u306e\u7bc4\u56f2\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b
CIDR\u8868\u8a18\uff08\u4f8b: 192.168.1.0\/24\uff09\u3092\u4f7f\u7528\u3057\u3066\u3001IP\u7bc4\u56f2\u5168\u4f53\u3092\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
bash
sudo iptables -A INPUT -s 192.168.1.0\/24 -j DROP<\/p>\n\n\n\n
4. \u8a2d\u5b9a\u306e\u78ba\u8a8d\u3068\u4fdd\u5b58
\u30eb\u30fc\u30eb\u78ba\u8a8d: sudo iptables -L -n –line-numbers<\/p>\n\n\n\n
\u8a2d\u5b9a\u4fdd\u5b58 (\u6c38\u7d9a\u5316):
sudo service iptables save \uff08\u307e\u305f\u306f iptables-save\uff09<\/p>\n\n\n\n
5. \u30d6\u30ed\u30c3\u30af\u306e\u89e3\u9664
\u8ffd\u52a0\u3057\u305f\u30eb\u30fc\u30eb\u3068\u540c\u3058\u30b3\u30de\u30f3\u30c9\u306e -A\uff08\u8ffd\u52a0\uff09\u3092 -D\uff08\u524a\u9664\uff09\u306b\u7f6e\u304d\u63db\u3048\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
bash
sudo iptables -D INPUT -s 192.168.1.100 -j DROP<\/p>\n\n\n\n
\u203b\u6ce8\u610f\u70b9
\u81ea\u8eab\u304c\u4f7f\u7528\u3057\u3066\u3044\u308bSSH\u63a5\u7d9a\u5143\u306eIP\u3092\u30d6\u30ed\u30c3\u30af\u3057\u306a\u3044\u3088\u3046\u3001\u5341\u5206\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002
DROP\u306f\u901a\u4fe1\u3092\u7121\u8996\u3057\u3001REJECT\u306f\u62d2\u5426\u3092\u901a\u77e5\u3057\u307e\u3059\u3002\u901a\u5e38\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0aDROP\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
iptables\u306e\u8a2d\u5b9a\u306f\u30b5\u30fc\u30d0\u30fc\u518d\u8d77\u52d5\u3067\u6d88\u3048\u308b\u305f\u3081\u3001\u5fc5\u305a\u4fdd\u5b58\u304c\u5fc5\u8981\u3067\u3059<\/p>\n\n\n\n
*******************************************************************<\/p>\n\n\n\n
1. \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b
\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f8b: 192.168.1.100\uff09\u304b\u3089\u306e\u3059\u3079\u3066\u306e\u901a\u4fe1\u3092\u62d2\u5426\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
bash
# \u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u30d6\u30ed\u30c3\u30af
sudo iptables -A INPUT -s 192.168.1.100 -j DROP<\/p>\n\n\n\n
-A INPUT: \u5165\u529b\u30d1\u30b1\u30c3\u30c8\u306e\u672b\u5c3e\u306b\u30eb\u30fc\u30eb\u3092\u8ffd\u52a0\u3057\u307e\u3059 0.4.17\u3002
-s: \u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002
-j DROP: \u30d1\u30b1\u30c3\u30c8\u3092\u7834\u68c4\uff08\u30d6\u30ed\u30c3\u30af\uff09\u3057\u307e\u3059<\/p>\n\n\n\n
2. \u7279\u5b9a\u306e\u30dd\u30fc\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b
\u7279\u5b9a\u306e\u30b5\u30fc\u30d3\u30b9\uff08\u4f8b: SSH\u306e22\u756a\u30dd\u30fc\u30c8\uff09\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u7279\u5b9a\u306eIP\u304b\u3089\u306e\u307f\u62d2\u5426\u3001\u3042\u308b\u3044\u306f\u5168\u4f53\u306b\u9069\u7528\u3059\u308b\u5834\u5408\u306e\u8a2d\u5b9a\u3067\u3059<\/p>\n\n\n\n
bash
# \u7279\u5b9a\u306eIP\u304b\u3089\u306e\u7279\u5b9a\u30dd\u30fc\u30c8(22\u756a)\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af
sudo iptables -A INPUT -p tcp -s 192.168.1.100 –dport 22 -j DROP<\/p>\n\n\n\n
-p tcp: \u30d7\u30ed\u30c8\u30b3\u30eb\uff08TCP\uff09\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002
–dport: \u5b9b\u5148\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u6307\u5b9a\u3057\u307e\u3059 0.4.28\u3002<\/p>\n\n\n\n
3. \u8a2d\u5b9a\u5185\u5bb9\u306e\u78ba\u8a8d\u3068\u524a\u9664
\u73fe\u5728\u306e\u30eb\u30fc\u30eb\u3092\u78ba\u8a8d\u3057\u305f\u308a\u3001\u9593\u9055\u3048\u305f\u8a2d\u5b9a\u3092\u6d88\u53bb\u3059\u308b\u65b9\u6cd5\u3067\u3059<\/p>\n\n\n\n
\u30eb\u30fc\u30eb\u306e\u78ba\u8a8d:
bash
sudo iptables -L -n -v<\/p>\n\n\n\n
-n: IP\u3084\u30dd\u30fc\u30c8\u3092\u540d\u524d\u89e3\u6c7a\u305b\u305a\u306b\u6570\u5b57\u3067\u8868\u793a\u3057\u3001\u9ad8\u901f\u5316\u3057\u307e\u3059<\/p>\n\n\n\n
\u30eb\u30fc\u30eb\u306e\u524a\u9664:
\u8ffd\u52a0\u3057\u305f\u30eb\u30fc\u30eb\u306e -A \u3092 -D \u306b\u5909\u3048\u308b\u3053\u3068\u3067\u524a\u9664\u3067\u304d\u307e\u3059\u3002
bash
sudo iptables -D INPUT -s 192.168.1.100 -j DROP<\/p>\n\n\n\n
4. \u8a2d\u5b9a\u306e\u4fdd\u5b58\uff08\u91cd\u8981\uff09
iptables\u30b3\u30de\u30f3\u30c9\u3067\u8a2d\u5b9a\u3057\u305f\u30eb\u30fc\u30eb\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u3092\u518d\u8d77\u52d5\u3059\u308b\u3068\u6d88\u3048\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u6c38\u7d9a\u5316\u3059\u308b\u305f\u3081\u306b\u306f\u4fdd\u5b58\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
bash
sudo service iptables save<\/p>\n\n\n\n
\u6ce8\u610f\u70b9
\u81ea\u5206\u81ea\u8eab\u3092\u7de0\u3081\u51fa\u3055\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f: SSH\u63a5\u7d9a\u4e2d\u306bSSH\u30dd\u30fc\u30c8\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u8a2d\u5b9a\u3092\u9069\u7528\u3059\u308b\u3068\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u64cd\u4f5c\u304c\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002
\u30eb\u30fc\u30eb\u306e\u9806\u5e8f: iptables\u306f\u4e0a\u304b\u3089\u9806\u756a\u306b\u30eb\u30fc\u30eb\u3092\u8a55\u4fa1\u3057\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u901a\u4fe1\u3092\u62d2\u5426\u3059\u308b\u8a2d\u5b9a\u306e\u300c\u4e0a\u300d\u306b\u3001\u8a31\u53ef\u3059\u308b\u8a2d\u5b9a\u3092\u66f8\u304f\u306e\u304c\u57fa\u672c\u3067\u3059<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
******************************************************************* iptables\u3067\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\uff08\u906e\u65ad\uff09\u3059\u308b\u57fa\u672c\u8a2d\u5b9a\u306f\u3001\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u30dd\u30fc […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-265","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/pages\/265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=265"}],"version-history":[{"count":1,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/pages\/265\/revisions"}],"predecessor-version":[{"id":266,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/pages\/265\/revisions\/266"}],"wp:attachment":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}