{"id":405,"date":"2026-04-19T16:30:34","date_gmt":"2026-04-19T07:30:34","guid":{"rendered":"https:\/\/falcon21.space\/kazuya\/work\/?p=405"},"modified":"2026-04-19T16:58:45","modified_gmt":"2026-04-19T07:58:45","slug":"iptables%e3%81%a7%e3%80%81%e7%89%b9%e5%ae%9aip%e3%82%a2%e3%83%89%e3%83%ac%e3%82%b9%e3%82%92%e3%83%96%e3%83%ad%e3%83%83%e3%82%af","status":"publish","type":"post","link":"https:\/\/falcon21.space\/kazuya\/work\/?p=405","title":{"rendered":"iptables\u3067\u3001\u7279\u5b9aip\u30a2\u30c9\u30ec\u30b9\u3092\u30d6\u30ed\u30c3\u30af"},"content":{"rendered":"\n<p>\u5bfe\u8c61\u3000<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">grep &#8220;postfix&#8221; \/var\/log\/maillog | grep &#8220;warning&#8221;<\/h1>\n\n\n\n<p>does not resolve to address 137.184.32.56<\/p>\n\n\n\n<p>postfix\/smtpd\u3000Blocked access\u30e1\u30fc\u30eb\u3088\u308a\u3000<br>\u3000103.67.163.179<br>\u3000141.98.9.106\u3000\u3000\u3000<\/p>\n\n\n\n<p>iptables\u3067\u3001\u7279\u5b9aip\u30a2\u30c9\u30ec\u30b9\u3092\u30d6\u30ed\u30c3\u30af<br>[root@falcon21 ~]# iptables -A INPUT -s 137.184.32.56 -j DROP<br>[root@falcon21 ~]# iptables -A INPUT -s 103.67.163.179 -j DROP<br>[root@falcon21 ~]# iptables -A INPUT -s 141.98.9.106 -j DROP<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5bfe\u8c61\u3000 grep &#8220;postfix&#8221; \/var\/log\/maillog | grep &#8220;warning&#8221; does not resolve to address 137.1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,1],"tags":[32],"class_list":["post-405","post","type-post","status-publish","format-standard","hentry","category-19","category-1","tag-iptables"],"_links":{"self":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/posts\/405","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/types\/post"}],"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=405"}],"version-history":[{"count":1,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/posts\/405\/revisions"}],"predecessor-version":[{"id":406,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=\/wp\/v2\/posts\/405\/revisions\/406"}],"wp:attachment":[{"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/falcon21.space\/kazuya\/work\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}