{"id":88,"date":"2012-08-06T16:55:56","date_gmt":"2012-08-06T07:55:56","guid":{"rendered":"http:\/\/auctionpro.co.kr\/WPress\/?p=88"},"modified":"2023-09-13T09:24:19","modified_gmt":"2023-09-13T00:24:19","slug":"iptables-%ec%88%98%ec%a0%95%ec%9e%ac%ec%8b%9c%ec%9e%91","status":"publish","type":"post","link":"https:\/\/www.auctionpro.co.kr\/?p=88","title":{"rendered":"iptables \uc218\uc815\/\uc7ac\uc2dc\uc791\/\ud655\uc778"},"content":{"rendered":"\n<h3 class=\"wp-block-heading has-black-color has-text-color\"> 1. iptables  \uc800\uc7a5 \uc989\uc2dc  \ucd5c\uadfc \ubc29\ud654\ubcbd \uc124\uc815\uc73c\ub85c \uc0ac\uc6a9 \uc124\uc815\ud558\uae30 <\/h3>\n\n\n\n<p> save \ud544\uc694\uc5c6\uc774  systemctl restart iptables  \uc2dc  \ubc14\ub85c \ubc29\ud654\ubcbd \uc801\uc6a9 \ub429\ub2c8\ub2e4.<br>\uc811\uc18d\ub41c putty\ub294 \ubc29\ud654\ubcbd \uc218\uc815\uacfc \uc0c1\uad00\uc5c6\uc774 \uacc4\uc18d \uc811\uc18d\ub418\uba70 ssh \ud655\uc778\uc740 \ub2e4\ub978 \ucc3d\uc5d0\uc11c  Putty \uc811\uc18d\ud6c4 \uc801\uc6a9\uc5ec\ubd80 \ud655\uc778 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\uc544\ub798 \uc0ac\ud56d yes\ub85c \uc218\uc815<\/h4>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:vim decode:true \" title=\"iptables-config\">[root@~]# vi \/etc\/sysconfig\/iptables-config\n\n# Save current firewall rules on restart.\n#   Value: yes|no,  default: no\n# Saves all firewall rules to \/etc\/sysconfig\/iptables if firewall gets\n# restarted.\nIPTABLES_SAVE_ON_RESTART=\"yes\"\n\n# Save (and restore) rule and chain counter.\n#   Value: yes|no,  default: no\n# Save counters for rules and chains to \/etc\/sysconfig\/iptables if\n# \u2018service iptables save\u2019 is called or on stop or restart if SAVE_ON_STOP or\n# SAVE_ON_RESTART is enabled.\nIPTABLES_SAVE_COUNTER=\"yes\"<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2. iptables \uc218\uc815  \ubc0f \uc124\uba85<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/linux-training.be\/networking\/images\/iptables_filter.png\" alt=\"\"\/><\/figure>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:vim decode:true \" title=\"vi \/etc\/sysconfig\/iptables\">[root@localhost]# vi \/etc\/sysconfig\/iptables\n# Generated by iptables-save v1.3.5 on Mon Jan 28 16:36:47 2013\n*filter\n:INPUT DROP [0:0]\n:FORWARD DROP [0:0]\n:OUTPUT ACCEPT [0:0]\n:RH-Firewall-1-INPUT - [0:0]\n# \ub9c9\uc744 \uc544\uc774\ud53c\uc601\uc5ed\uc9c0\uc815 \n-A RH-Firewall-1-INPUT -s 5.9.167.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 114.108.152.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 114.108.153.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 177.129.90.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 116.124.131.0\/24 -j DROP\n\n[0:0] -A INPUT -j RH-Firewall-1-INPUT\n[0:0] -A FORWARD -j RH-Firewall-1-INPUT\n[0:0] -A RH-Firewall-1-INPUT -i lo -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT\n#\ud5c8\uc6a9\uc544\uc774\ud53c,Port \uc9c0\uc815\n[0:0] -A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p udp -m udp --dport 53 -j ACCEPT   \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 53 -j ACCEPT   \n[0:0] -A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 20 -j ACCEPT   \n[0:0] -A RH-Firewall-1-INPUT -s 111.111.111.222 -j ACCEPT   \n[0:0] -A RH-Firewall-1-INPUT -s 210.123.21.175 -p tcp -m tcp --dport 22 -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 21 -j ACCEPT   \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 143 -j ACCEPT  \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 80 -j ACCEPT   \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 443 -j ACCEPT  \n[0:0] -A RH-Firewall-1-INPUT -j DROP  \nCOMMIT<\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\uc124\uba85<\/h2>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"theme:eclipse lang:vim decode:true \">#\ud5c8\uc6a9\uc544\uc774\ud53c,Port \uc9c0\uc815\n[0:0] -A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p udp -m udp --dport 53 -j ACCEPT   # udp 53 port  \ud5c8\uc6a9 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 53 -j ACCEPT   # tcp 53 port \ud5c8\uc6a9 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 20 -j ACCEPT   # tcp 20 port \ud5c8\uc6a9 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -s 111.111.111.222 -j ACCEPT   # \ub0b4 PC\ub294 \ubaa8\ub450 \ud3ec\ud2b8 \ud5c8\uc6a9 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -s 210.123.21.175 -p tcp -m tcp --dport 22 -j ACCEPT #\ud2b9\uc815 IP\uc5d0\uc11c\ub9cc 22\ud3ec\ud2b8 \ud5c8\uc6a9 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 21 -j ACCEPT   #ftp \ud3ec\ud2b8 \uc5f4\uae30 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 143 -j ACCEPT  #143 \ud3ec\ud2b8 \uc5f4\uae30  #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 80 -j ACCEPT   #http \ud3ec\ud2b8 \uc5f4\uae30 #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 443 -j ACCEPT  #https \ud3ec\ud2b8 \uc5f4\uae30  #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589\n[0:0] -A RH-Firewall-1-INPUT -j DROP  # \uadf8 \uc678\uc5d0 \ubaa8\ub450 \ub4dc\ub78d (\ubc18\ub4dc\uc2dc \uc788\uc5b4\uc57c \ud568) #\uc774\ud6c4\ub294 \uc0ad\uc81c\ud6c4 \uc2e4\ud589<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 \uc8fc\uc11d\ucd94\uac00 \uc0d8\ud50c (\uc8fc\uc11d\ucd5c\ub300 256\ubc14\uc774\ud2b8)<\/h3>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:vim decode:true \">[root@localhost]# vi \/etc\/sysconfig\/iptables\n# Generated by iptables-save v1.3.5 on Mon Jan 28 16:36:47 2013\n*filter\n:INPUT DROP [0:0]\n:FORWARD DROP [0:0]\n:OUTPUT ACCEPT [0:0]\n:RH-Firewall-1-INPUT - [0:0]\n# \ub9c9\uc744 \uc544\uc774\ud53c\uc601\uc5ed\uc9c0\uc815 \n-A RH-Firewall-1-INPUT -s 5.9.167.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 114.108.152.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 114.108.153.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 177.129.90.0\/24 -j DROP\n-A RH-Firewall-1-INPUT -s 116.124.131.0\/24 -j DROP\n \n[0:0] -A INPUT -j RH-Firewall-1-INPUT\n[0:0] -A FORWARD -j RH-Firewall-1-INPUT\n[0:0] -A RH-Firewall-1-INPUT -i lo -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT\n#\ud5c8\uc6a9\uc544\uc774\ud53c,Port \uc9c0\uc815\n[0:0] -A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p udp -m udp --dport 53 -m comment --comment \"Domain udp 53 port  \ud5c8\uc6a9\" -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 53 -m comment --comment \"Domain udp 53 port  \ud5c8\uc6a9\" -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 20 -m comment --comment \"tcp 20 port \ud5c8\uc6a9\" -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -s 111.111.111.222 -m comment --comment \"\ub0b4 PC\ub294 \ubaa8\ub450 \ud3ec\ud2b8 \ud5c8\uc6a9\" -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -s 210.123.21.175 -p tcp -m tcp --dport 22 -m comment --comment \"\ud2b9\uc815 IP\uc5d0\uc11c\ub9cc 22\ud3ec\ud2b8 \ud5c8\uc6a9\" -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 21 -m comment --comment \"ftp \ud3ec\ud2b8 \uc5f4\uae30\" -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 143 -m comment --comment \"143 \ud3ec\ud2b8 \uc5f4\uae30\" -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 80 -m comment --comment \"http \ud3ec\ud2b8 \uc5f4\uae30\" -j ACCEPT \n[0:0] -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 443 -m comment --comment \"https \ud3ec\ud2b8 \uc5f4\uae30\" -j ACCEPT\n[0:0] -A RH-Firewall-1-INPUT -m comment --comment \"- \uadf8 \uc678\uc5d0 \ubaa8\ub450 \ub4dc\ub78d (\ubc18\ub4dc\uc2dc \uc788\uc5b4\uc57c \ud568)\" -j DROP  \nCOMMIT<\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li>-A (\u2013-append) : \uc0c8\ub85c\uc6b4 \uaddc\uce59\uc744 \ucd94\uac00<\/li>\n\n\n\n<li>ACCEPT : \ud328\ud0b7\uc744 \ubc1b\uc544\ub4e4\uc784.<\/li>\n\n\n\n<li>DROP : \ud328\ud0b7\uc744 \ubc84\ub9bc (\ud328\ud0b7\uc804\uc1a1\uc774 \uc5c6\uc5c8\ub358 \uac83 \ucc98\ub7fc)<\/li>\n\n\n\n<li>-s (\u2013source) : \ucd9c\ubc1c\uc9c0 IP\uc8fc\uc18c\ub098 \ub124\ud2b8\uc6cc\ud06c\uc640\uc758 \ub9e4\uce6d<\/li>\n\n\n\n<li>-d (\u2013destination) : \ubaa9\uc801\uc9c0 IP\uc8fc\uc18c\ub098 \ub124\ud2b8\uc6cc\ud06c\uc640\uc758 \ub9e4\uce6d<\/li>\n\n\n\n<li>-p (\u2013protocol) : \ud2b9\uc815 \ud504\ub85c\ud1a0\ucf5c\uacfc\uc758 \ub9e4\uce6d<\/li>\n\n\n\n<li>-i (\u2013in-interface) : \uc785\ub825 \uc778\ud130\ud398\uc774\uc2a4<\/li>\n\n\n\n<li>-o (\u2013out-interface) : \ucd9c\ub825 \uc778\ud130\ud398\uc774\uc2a4<\/li>\n\n\n\n<li>\u2013state : \uc5f0\uacb0\uc0c1\ud0dc\uc640\uc758 \ub9e4\uce6d<\/li>\n\n\n\n<li>\u2013comment : \ucee4\ub110 \uba54\ubaa8\ub9ac \ub0b4\uc758 \uaddc\uce59\uacfc \uc5f0\uacc4\ub418\ub294 \ucd5c\ub300 256\ubc14\uc774\ud2b8 \uc8fc\uc11d<\/li>\n\n\n\n<li>-y (\u2013syn) : SYN \ud328\ud0b7\uc744 \ud5c8\uc6a9\ud558\uc9c0 \uc54a\uc74c<\/li>\n\n\n\n<li>-f(\u2013fragment) : \ub450\ubc88\uc9f8 \uc774\ud6c4\uc758 \uc870\uac00\uac8c \ub300\ud574\uc11c \uaddc\uce59\uc744 \uba85\uc2dc\ud55c\ub2e4.<\/li>\n\n\n\n<li>-t (\u2013table) : \ucc98\ub9ac\ub420 \ud14c\uc774\ube14<\/li>\n\n\n\n<li>-j (\u2013jump) : \uaddc\uce59\uc5d0 \ub9de\ub294 \ud328\ud0b7\uc744 \uc5b4\ub5bb\uac8c \ucc98\ub9ac\ud560\uac83\uc778\uac00\ub97c \uba85\uc2dc\ud55c\ub2e4.<\/li>\n\n\n\n<li>-m (\u2013match) : \ud2b9\uc815 \ubaa8\ub4c8\uacfc\uc758 \ub9e4\uce58<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. \ud655\uc778<\/h3>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:vim decode:true \">iptables -nL<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">4. \uc801\uc6a9 \/ \uc7ac\uc2dc\uc791<\/h3>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:vim decode:true \">[root@localhost bin]# systemctl restart iptables\n\n\/\/\uad6c\uba85\ub839\uc5b4 \n\/etc\/init.d\/iptables restart\n\ubc29\ud654\ubcbd \uaddc\uce59\uc744 \uc0ad\uc81c\ud558\ub294 \uc911:                               [  OK  ]\nchains\ub97c ACCEPT \uaddc\uce59\uc73c\ub85c \uc124\uc815\ud568: filter                  [  OK  ]\niptables \ubaa8\ub4c8\uc744 \uc81c\uac70\ud558\ub294 \uc911:                             [  OK  ]\niptables \ubc29\ud654\ubcbd \uaddc\uce59\ub4e4\uc744 \uc801\uc6a9\ud558\ub294 \uc911:                    [  OK  ]\n\ucd94\uac00 iptables \ubaa8\ub4c8\uc744 \uc77d\uc5b4\uc624\ub294 \uc911:                        [  OK  ]\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\uae30\ud0c0  <\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \ud328\ucf13(\uc811\uc18d\uc218) \uac1c\uc218 \ubcf4\uae30<\/h4>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:vim decode:true \" title=\"iptables -nvL --line-numbers\"># iptables -nvL --line-numbers\nChain INPUT (policy DROP 0 packets, 0 bytes)\nnum   pkts bytes target     prot opt in     out     source               destination\n1     1591  214K RH-Firewall-1-INPUT  all  --  *      *       0.0.0.0\/0            0.0.0.0\/0\n\nChain FORWARD (policy DROP 0 packets, 0 bytes)\nnum   pkts bytes target     prot opt in     out     source               destination\n1        0     0 RH-Firewall-1-INPUT  all  --  *      *       0.0.0.0\/0            0.0.0.0\/0\n\nChain OUTPUT (policy ACCEPT 1180 packets, 6223K bytes)\nnum   pkts bytes target     prot opt in     out     source               destination\n\nChain RH-Firewall-1-INPUT (2 references)\nnum   pkts bytes target     prot opt in     out     source               destination\n1        0     0 DROP       all  --  *      *       206.124.132.23       0.0.0.0\/0\n2        0     0 DROP       all  --  *      *       76.72.173.179        0.0.0.0\/0\n3        0     0 ACCEPT     all  --  lo     *       0.0.0.0\/0            0.0.0.0\/0\n4        0     0 ACCEPT     icmp --  *      *       0.0.0.0\/0            0.0.0.0\/0            icmptype 255\n5        0     0 ACCEPT     udp  --  *      *       0.0.0.0\/0            224.0.0.251          udp dpt:5353\n6        0     0 ACCEPT     udp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            udp dpt:53\n7        0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:53\n8        0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:50002\n9        0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpts:60010:60020\n10      12   648 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:80\n11    1551  209K ACCEPT     all  --  *      *       0.0.0.0\/0            0.0.0.0\/0            state RELATED,ESTABLISHED\n17       0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:25\n18       0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:143\n19       0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:110\n20       0     0 ACCEPT     tcp  --  *      *       0.0.0.0\/0            0.0.0.0\/0            tcp dpt:443\n21      15  3348 DROP       all  --  *      *       0.0.0.0\/0            0.0.0.0\/0<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">2. \ud328\ucf13 0 \ucd08\uae30\ud654 <\/h3>\n\n\n\n<div class=\"wp-block-urvanov-syntax-highlighter-code-block\"><pre class=\"lang:c# decode:true \" title=\"iptables -Z\"># iptables -Z<\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>1. iptables \uc800\uc7a5 \uc989\uc2dc \ucd5c\uadfc \ubc29\ud654\ubcbd \uc124\uc815\uc73c\ub85c \uc0ac\uc6a9 \uc124\uc815\ud558\uae30 save \ud544\uc694\uc5c6\uc774 systemctl restart iptables \uc2dc \ubc14\ub85c \ubc29\ud654\ubcbd \uc801\uc6a9 \ub429\ub2c8\ub2e4.\uc811\uc18d\ub41c putty\ub294 \ubc29\ud654\ubcbd \uc218\uc815\uacfc \uc0c1\uad00\uc5c6\uc774 \uacc4\uc18d \uc811\uc18d\ub418\uba70 <a class=\"mh-excerpt-more\" href=\"https:\/\/www.auctionpro.co.kr\/?p=88\" title=\"iptables \uc218\uc815\/\uc7ac\uc2dc\uc791\/\ud655\uc778\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-88","post","type-post","status-publish","format-standard","hentry","category-centos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>iptables \uc218\uc815\/\uc7ac\uc2dc\uc791\/\ud655\uc778 - AuctionPro<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.auctionpro.co.kr\/?p=88\" 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