{"id":2178,"date":"2022-01-26T17:12:20","date_gmt":"2022-01-26T09:12:20","guid":{"rendered":"https:\/\/199604.com\/?p=2178"},"modified":"2022-01-26T17:12:20","modified_gmt":"2022-01-26T09:12:20","slug":"iptables%e5%ae%89%e8%a3%85%e4%b8%8e%e5%b7%a5%e4%bd%9c%e4%bd%bf%e7%94%a8%e8%ae%b0%e5%bd%95","status":"publish","type":"post","link":"https:\/\/199604.com\/2178","title":{"rendered":"iptables\u5b89\u88c5\u4e0e\u5de5\u4f5c\u4f7f\u7528\u8bb0\u5f55"},"content":{"rendered":"<h1>iptables\u5b89\u88c5\u4e0e\u5de5\u4f5c\u4f7f\u7528\u8bb0\u5f55<\/h1>\n<h2>1.\u51c6\u5907\uff08\u5fc5\u5907\uff09<\/h2>\n<p>centos\u5b89\u88c5telnet-server,\u9ed8\u8ba4\u542f\u52a823\u7aef\u53e3\uff0c\u901a\u8fc7telnet\u5ba2\u6237\u7aef\u53ef\u4ee5\u8fde\u63a5telent-server\u670d\u52a1\u5668\uff0c\u6b63\u5e38\u6267\u884clinux\u7684\u64cd\u4f5c\uff0c\u4f46\u662f\u56e0\u4e3atelnet\u5728\u7f51\u7edc\u4e0a\u662f\u901a\u8fc7\u660e\u6587\u4f20\u8f93\u7684\uff0c\u4e0d\u5b89\u5168\uff0c\u6240\u4ee5\u5347\u7ea7\u5b8cssh\u4e4b\u540e\u9700\u8981\u91cd\u65b0\u5173\u95edtelnet-server\u670d\u52a1\u3002<\/p>\n<p>\u6267\u884c\u6b65\u9aa4<\/p>\n<pre><code class=\"language-bash \">yum install -y telnet-server xinetd\n<\/code><\/pre>\n<p>telnet-server\u6258\u7ba1\u4e8elinux\u7684\u8d85\u7ea7\u8fdb\u7a0bxinetd,\u914d\u7f6exinetd\uff0c\u6267\u884c<\/p>\n<pre><code class=\"language-bash \">vi \/etc\/xinetd.d\/telnet\n<\/code><\/pre>\n<p>\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\u7684\u8bdd\u5219\u65b0\u5efa\u6587\u4ef6\uff0c\u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u68c0\u67e5<code>disable<\/code> \u53c2\u6570\u662f\u5426\u8bbe\u7f6e\u4e3a<code>no<\/code> ,\u5982\u679c\u662f<code>yes<\/code>\uff0c\u5219\u6539\u4e3a<code>no<\/code><\/p>\n<pre><code class=\"language-bash \">service telnet\n{\n        flags           = REUSE\n        socket_type     = stream\n        wait            = no\n        user            = root\n        server          = \/usr\/sbin\/in.telnetd\n        log_on_failure  += USERID\n        disable         = no\n}\n<\/code><\/pre>\n<p>\u91cd\u542fxinetd<\/p>\n<pre><code class=\"language-bash \">service xinetd restart\n#\u6216\u8005\u6839\u636e\u64cd\u4f5c\u7cfb\u7edf\u7684\u7248\u672c\u4e0d\u540c\nsystemctl restart xinetd\n<\/code><\/pre>\n<p>\u67e5\u770btelnet\u7aef\u53e3\u662f\u5426\u542f\u52a8\uff0c\u770b\u523023\u7aef\u53e3(\u9ed8\u8ba4\uff09\u4e5f\u6709\u53ef\u80fd\u662f\u5176\u4ed6\u7aef\u53e3 \u5373\u6b63\u5e38\u542f\u52a8<\/p>\n<pre><code class=\"language-bash \">netstat -ntlp |grep xinetd\n<\/code><\/pre>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0ctelnet\u4e0d\u5141\u8bb8root\u8fdc\u7a0b\u767b\u5f55\uff0c\u6211\u4eec\u6b64\u5904\u4f7f\u7528\u666e\u901a\u7528\u6237\u767b\u5f55telnet\uff0c\u5982\u679c\u9700\u8981root\u6743\u9650\uff0c\u7528\u666e\u901a\u7528\u6237\u767b\u5f55 \u901a\u8fc7<code>su root<\/code>\u5207\u6362\u81f3root\u5373\u53ef<\/p>\n<h2>2.\u4f7f\u7528iptables\u5148\u5173\u95ed\u81ea\u5e26\u7684\u9632\u706b\u5899<\/h2>\n<pre><code class=\"language-bash \">sudo systemctl stop firewall.service\nsudo systemctl disable firewall.service\n<\/code><\/pre>\n<h2>3.\u5b89\u88c5\u4e0e\u8bbe\u7f6e\u5f00\u673a\u542f\u7528iptables:<\/h2>\n<pre><code class=\"language-bash \">sudo yum install iptables-services\nsudo systemctl restart iptables.service\nsudo systemctl enable iptables.service\n<\/code><\/pre>\n<h2>4.\u7aef\u53e3\u62e6\u622a\u7684\u4f7f\u7528<\/h2>\n<pre><code class=\"language-bash \"># \u6e05\u9664\u89c4\u5219\u94fe\u4e2d\u5df2\u6709\u7684\u6761\u76ee\niptables -F \n\n# \u6bd4\u5982\u9700\u8981\u9650\u523622\u7aef\u53e3\niptables -A INPUT -s 172.16.140.0\/24 -p tcp -m tcp --dport 22 -j ACCEPT\niptables -A INPUT -s 10.209.192.131\/32 -p tcp -m tcp --dport 22 -j ACCEPT\niptables -A INPUT -s 127.0.0.1\/32 -p tcp -m tcp --dport 22 -j ACCEPT\niptables -A INPUT -p tcp -m tcp --dport 22 -j REJECT --reject-with icmp-port-unreachable\niptables -A OUTPUT -p tcp -m tcp --dport 22 -j ACCEPT\n\n# \u4fdd\u5b58\u5e76\u91cd\u542f\nservice iptables save\nservice iptables restart\n\n# \u67e5\u770b\u751f\u6548\u89c4\u5219\niptables -vxnL\n<\/code><\/pre>\n<h2>5.\u5982\u679c\u6ca1\u95ee\u9898,\u5219\u5173\u95edtelnet-server,\u907f\u514d\u4e0d\u5b89\u5168\u7684\u6f0f\u6d1e<\/h2>\n<pre><code class=\"language-bash \">service xinetd stop\n\nrpm -e telnet-server xinetd\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>iptables\u5b89\u88c5\u4e0e\u5de5\u4f5c\u4f7f\u7528\u8bb0\u5f55 1.\u51c6\u5907\uff08\u5fc5\u5907\uff09 centos\u5b89\u88c5telnet-server,\u9ed8\u8ba4\u542f\u52a823 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[260],"tags":[376,70],"class_list":["post-2178","post","type-post","status-publish","format-standard","hentry","category-linux","tag-iptables","tag-linux"],"_links":{"self":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/2178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/comments?post=2178"}],"version-history":[{"count":1,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/2178\/revisions"}],"predecessor-version":[{"id":2179,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/posts\/2178\/revisions\/2179"}],"wp:attachment":[{"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/media?parent=2178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/categories?post=2178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/199604.com\/wp-json\/wp\/v2\/tags?post=2178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}