\u57fa\u4e8e\u4e0a\u8ff0\u539f\u56e0\uff0c\u5728\u5b9e\u9645\u7684 Linux \u7cfb\u7edf\u5e94\u7528\u4e2d\uff0c\u901a\u5e38\u5efa\u8bae\u53ea\u9009\u62e9\u4f7f\u7528 iptables \u670d\u52a1\u6216\u8005 firewalld \u670d\u52a1\u4e2d\u7684\u4e00\u79cd\u6765\u8fdb\u884c\u7cfb\u7edf\u7684\u7f51\u7edc\u9632\u706b\u5899\u7ba1\u7406\uff0c\u907f\u514d\u4e8c\u8005\u540c\u65f6\u542f\u7528\u5e26\u6765\u7684\u5404\u79cd\u51b2\u7a81\u95ee\u9898\u3002<\/strong><\/p>\n\n\n\n
iptabes\u4f9d\u8d56\u7684\u8f6f\u4ef6\u6709\u4e24\u4e2a\uff1aiptables\u3001iptables-services\uff0c\u4e00\u822c\u7cfb\u7edf\u4f1a\u9ed8\u8ba4\u5b89\u88c5\u7b2c\u4e00\u4e2a\u5305\uff0c\u7b2c\u4e8c\u4e2a\u5305\u662f\u670d\u52a1\u5305\uff0c\u53ef\u4ee5\u5b9e\u73b0iptables\u89c4\u5219\u7684\u5f00\u673a\u81ea\u52a8\u52a0\u8f7d\uff0c\u5173\u673a\u81ea\u52a8\u4fdd\u5b58\u7b49\u529f\u80fd,\u7ed3\u5408\u4e00\u4e0b\u914d\u7f6e\u5185\u5bb9\u5b9e\u73b0\u3002<\/strong><\/p>\n\n\n\n \u914d\u7f6e\u5b8c\u6210\u540e\u91cd\u542fiptables\u670d\u52a1\uff1asystemctl enable iptables && systemctl restart iptables \u5373\u53ef\u751f\u6548\u3002 iptables\u7684\u89c4\u5219\u8bbe\u7f6e<\/strong><\/p>\n\n\n\n \u5728\u8bbe\u7f6eiptables\u89c4\u5219\u524d\u9700\u8981\u4e86\u89e3\u6570\u636e\u5305\u5728\u4f20\u8f93\u8fc7\u7a0b\uff08\u5982\u4e0b\u56fe\uff09<\/p>\n\n\n\n 1\u3001\u8fdb\u5165\u7cfb\u7edf\u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u5305\uff1a<\/p>\n\n\n\n 2\u3001\u8f6c\u53d1\u7684\u6570\u636e\u5305\uff1a<\/p>\n\n\n\n iptables\u4e2d\u5171\u67094\u5f20\u8868<\/strong><\/p>\n\n\n\n iptables\u4e2d\u5171\u67095\u6761\u94fe<\/strong><\/p>\n\n\n\n iptables\u8bed\u6cd5\u7ed3\u6784 <\/strong><\/p>\n\n\n\n \u914d\u7f6e\u6837\u4f8b\uff1a<\/strong><\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" iptables\u662f\u7ba1\u7406linux\u9632\u706b\u5899\u6a21\u5757netfilter\u7684\u7528\u6237\u7aef\u63a5\u53e3\u7a0b\u5e8f\uff0c\u901a\u8fc7iptables\u53ef\u4ee5\u65b9\u4fbf\u7684\u7ba1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"footnotes":""},"categories":[20,7],"tags":[70,71,50],"class_list":["post-410","post","type-post","status-publish","format-aside","hentry","category-linux","category-7","tag-iptables","tag-nat","tag-50","post_format-post-format-aside"],"_links":{"self":[{"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=\/wp\/v2\/posts\/410","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=410"}],"version-history":[{"count":15,"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=\/wp\/v2\/posts\/410\/revisions"}],"predecessor-version":[{"id":1083,"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=\/wp\/v2\/posts\/410\/revisions\/1083"}],"wp:attachment":[{"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigvip.dpdns.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}iptables\u914d\u7f6e\u6587\u4ef6\uff1a\/etc\/sysconfig\/iptables-config\n\nIPTABLES_MODULES=\"nf_conntrack_ftp\" \/\/\u8bbe\u7f6eiptables\u542f\u52a8\u65f6\u9ed8\u8ba4\u52a0\u8f7d\u7684\u6a21\u5757\n\nIPTABLES_SAVE_ON_STOP=\"yes\" \/\/\u8bbe\u7f6e\u505c\u6b62\u65f6\u81ea\u52a8\u4fdd\u5b58iptables\u89c4\u5219\n\nIPTABLES_SAVE_ON_RESTART=\"yes\" \/\/\u8bbe\u7f6e\u91cd\u542f\u65f6\u81ea\u52a8\u4fdd\u5b58iptables\u89c4\u5219\n\nIPTABLES_RESTORE_WAIT=0 \/\/\u8bbe\u7f6eiptables\u5f00\u542f\u540e\u9a6c\u4e0a\u6062\u590d\u539f\u6709\u89c4\u5219<\/code><\/pre>\n\n\n\n
\u9ed8\u8ba4iptables\u7684\u89c4\u5219\u81ea\u52a8\u4fdd\u5b58\u5728\/etc\/sysconfig\/iptables\u4e2d;\u53ef\u4ee5\u4f7f\u7528 service iptables save \u5373\u523b\u4fdd\u5b58\u89c4\u5219\u3002
iptables-save >\/path\/to\/file \u53ef\u4ee5\u628a\u9632\u706b\u5899\u89c4\u5219\u4fdd\u5b58\u5230\u6307\u5b9a\u7684\u8def\u5f84\u3002\u6062\u590d\u6307\u5b9a\u7684\u9632\u706b\u5899\u89c4\u5219\u53ef\u4ee5\u4f7f\u7528\uff1aiptables-restore <\/path\/to\/file<\/p>\n\n\n\n![\"\"](\"http:\/\/192.168.5.24\/wp-content\/uploads\/2024\/11\/image-6.png\")
<\/figure>\n\n\n\n\n
\n
iptables\u4e2d\u8868\u94fe\u4e4b\u95f4\u7684\u5173\u7cfb<\/strong>\uff0c\u6bcf\u4e2a\u8868\u91cc\u9762\u5305\u542b\u6709\u591a\u4e2a\u94fe\uff0c\u4e0d\u540c\u7684\u8868\u5305\u542b\u7684\u94fe\u662f\u4e0d\u4e00\u6837\u7684<\/p>\n\n\n\n\n
iptables [-t \u8868\u540d] \u7ba1\u7406\u9009\u9879 [\u94fe\u540d] [\u6761\u4ef6\u5339\u914d] [-j \u76ee\u6807\u52a8\u4f5c\u6216\u8df3\u8f6c]<\/code><\/pre>\n\n\n\n<\/td> table<\/strong><\/td> command<\/strong><\/td> chain<\/strong><\/td> Parameter & Xmatch <\/strong><\/td> target<\/strong><\/td><\/tr> iptables<\/td> -t filter
nat
mangle
raw<\/td>-A
-I
-P
-D
-R
-F
-L
-Z
-n
-v<\/td>INPUT
FORWARD
OUPUT
PREROUTING
POSTROUTING<\/td>-p tcp\/udp\/icmp
–sport
–dport
-s
-d
-m multiport
–dports
-m state<\/td>-j ACCEPT
DROP
REJECT
DNAT
SNAT
MASQUERADE
LOG
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n#SNAT\u914d\u7f6e\n[root@localhost ~]# iptables -t nat -A POSTROUTING -s 192.168.100.0\/24 -o ens34\n-j SNAT --to-source 1.1.1.1\n#\u6216\u8005\n[root@localhost ~]# iptables -t nat -A POSTROUTING -s 192.168.100.0\/24 -o ens34\n-j MASQUERADE\n\n#DNAT\u914d\u7f6e\n[root@localhost ~]# iptables -t nat -A PREROUTING -d 1.1.1.1 -p tcp --dport 80 -\nj DNAT --to-destination 192.168.100.10\n\n#\u57fa\u4e8e\u72b6\u6001\u8fc7\u6ee4\u6570\u636e\u5305\n[root@localhost ~]# iptables -I INPUT -m state --state ESTABLISHED,RELATED -j\nACCEPT\n\n#\u5141\u8bb8ping\u56de\u5e94\uff08echo-reply\uff09\n[root@localhost ~]# iptables -t filter -I INPUT -p icmp -m icmp --icmp-type\necho-reply -j ACCEPT \n\n#multiport\uff1a\u591a\u7aef\u53e3\n[root@localhost ~]#iptables -I INPUT -d 192.168.2.10 -p tcp -m multiport --\ndports 22,80 -j ACCEPT\n\n#-m iprange\n#iprange\u591aip\u5730\u5740(-src-range\u539f\u5730\u5740\u8303\u56f4\uff0c--dst-range\u76ee\u7684\u5730\u5740\u8303\u56f4)\ni[root@localhost ~]#ptables -A INPUT -d 192.168.2.10 -p tcp --dport 23 -m\niprange --src-range 192.168.2.11-192.168.2.21 -j ACCEPT\n\n#\u6bcf\u54681-5\u76848\uff1a00-18\uff1a00\n[root@localhost ~]#iptables -A INPUT -d 192.168.2.10 -p tcp --dport 80 -m time -\n-weekdays Mon,Tus,Wed,Thu,Fri --timestart 08:00:00 --time-stop 18:00:00 -j\nACCEPT\n\n#2020-1-10\u768418\u70b9\u52302022-1-10\u768418\u70b9\n[root@localhost ~]#iptables -I INPUT -s 172.17.1.132 -d 192.168.1.119 -m time\n--datestart 2020-1-10T18:00:0 --datestop 2022-1-10T18:00:00 -j ACCEPT\n\n#-m comment \u5bf9\u89c4\u5219\u8fdb\u884c\u5907\u6ce8\u8bf4\u660e\uff08\u6dfb\u52a0\u6ce8\u91ca\uff09\n[root@localhost ~]#iptables -A INPUT -s 192.168.2.250 -m comment --comment \"\u6ce8\u91ca\n\u5185\u5bb9\" -j REJECT<\/code><\/pre>\n\n\n\n