{"id":18084,"date":"2013-11-15T11:12:00","date_gmt":"2013-11-15T03:12:00","guid":{"rendered":"https:\/\/2blog.ilc.edu.tw\/25793\/2013\/11\/15\/%e8%a8%ad%e5%ae%9a-linux-%e4%b8%8a%e7%9a%84%e9%98%b2%e7%81%ab%e7%89%86\/"},"modified":"2013-11-15T11:12:00","modified_gmt":"2013-11-15T03:12:00","slug":"%e8%a8%ad%e5%ae%9a-linux-%e4%b8%8a%e7%9a%84%e9%98%b2%e7%81%ab%e7%89%86","status":"publish","type":"post","link":"https:\/\/2blog.ilc.edu.tw\/25793\/2013\/11\/15\/%e8%a8%ad%e5%ae%9a-linux-%e4%b8%8a%e7%9a%84%e9%98%b2%e7%81%ab%e7%89%86\/","title":{"rendered":"\u8a2d\u5b9a Linux \u4e0a\u7684\u9632\u706b\u7246"},"content":{"rendered":"

\u4e4b\u524d\u90fd\u662f\u5148\u628a Firewall\u00a0\u7684\u898f\u5247\u5beb\u5728\u55ae\u4e00 Script\u00a0\u4e2d\uff0c\u7136\u5f8c\u5728\u958b\u6a5f\u6642\u57f7\u884c\uff0c\u73fe\u5728\u6539\u7528\u5728 \/etc\/sysconfig\/iptables\u00a0\u4e2d\u8a2d\u5b9a\uff0c\u7136\u5f8c\u53ea\u8981\u5728\u958b\u6a5f\u6642\u57f7\u884c iptables\u00a0\u670d\u52d9\u5373\u53ef\u3002 <\/p>\n

\u67e5\u770b\u76ee\u524d\u7684 iptables Firewall\u00a0\u898f\u5247
# iptables -L -n <\/span>
Chain INPUT (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

Chain FORWARD (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

Chain OUTPUT (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

\u7531\u4e0a\u53ef\u4ee5\u770b\u51fa\uff0c\u76ee\u524d\u662f\u9580\u6236\u6d1e\u958b\uff0c\u5b8c\u6210\u6c92\u6709\u4efb\u4f55\u9632\u5099[@more@]\u4fee\u6539 iptables Firewall\u00a0\u898f\u5247
1.\u00a0\u4fee\u6539\u9810\u8a2d\u9032\u5165 INPUT\u00a0\u7684\u9810\u8a2d\u898f\u5247\u70ba DROP
# vim \/etc\/sysconig\/iptables <\/span>
# Generated by iptables-save v1.4.7 on Fri Nov 15 11:01:16 2013 <\/span>
*filter <\/span>
:INPUT DROP [74:5300] <\/span>
:FORWARD ACCEPT [0:0] <\/span>
:OUTPUT ACCEPT [48:5360] <\/span> <\/p>\n

\u91cd\u65b0\u555f\u52d5 Firewall
# service iptables restart <\/span> <\/p>\n

# iptables -L -n <\/span>
Chain INPUT (policy DROP) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

Chain FORWARD (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

Chain OUTPUT (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

2. \u958b\u555f\u672c\u6a5f\u6240\u63d0\u4f9b\u7684\u4e00\u4e9b\u670d\u52d9(SSH \/ Web \/ DNS \/ FTP)
# vim \/etc\/sysconig\/iptables <\/span>
# Generated by iptables-save v1.4.7 on Fri Nov 15 11:01:16 2013 <\/span>
*filter <\/span>
:INPUT DROP [74:5300] <\/span>
:FORWARD ACCEPT [0:0] <\/span>
:OUTPUT ACCEPT [48:5360] <\/span>
-A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT <\/span>
-A INPUT -m state –state NEW -p tcp -m tcp –dport 22 -j ACCEPT <\/span>
-A INPUT -m state –state NEW -p udp -m udp –dport 53 -j ACCEPT <\/span>
-A INPUT -m state –state NEW -p tcp -m tcp –dport 53 -j ACCEPT <\/span>
-A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT <\/span>
-A INPUT -m state –state NEW -m tcp -p tcp –dport 443 -j ACCEPT <\/span>
-A INPUT -p tcp -m multiport –dports 20,21,34500:34600 -j ACCEPT <\/span>
COMMIT <\/span>
# Completed on Fri Nov 15 11:01:16 2013 <\/span> <\/p>\n

\u91cd\u65b0\u555f\u52d5 Firewall
# service iptables restart <\/span>
# iptables -L -n <\/span>
Chain INPUT (policy DROP) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span>
ACCEPT\u00a0\u00a0\u00a0\u00a0 all\u00a0 —\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 state RELATED,ESTABLISHED <\/span>
ACCEPT\u00a0\u00a0\u00a0\u00a0 udp\u00a0 —\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 state NEW udp dpt:53 <\/span>
ACCEPT\u00a0\u00a0\u00a0\u00a0 tcp\u00a0 —\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 state NEW tcp dpt:53 <\/span>
ACCEPT\u00a0\u00a0\u00a0\u00a0 tcp\u00a0 —\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 state NEW tcp dpt:80 <\/span>
ACCEPT\u00a0\u00a0\u00a0\u00a0 tcp\u00a0 —\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 state NEW tcp dpt:443 <\/span>
ACCEPT\u00a0\u00a0\u00a0\u00a0 tcp\u00a0 —\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0.0.0\/0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 multiport dports 20,21,34500:34600 <\/span> <\/p>\n

Chain FORWARD (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/span> <\/p>\n

Chain OUTPUT (policy ACCEPT) <\/span>
target\u00a0\u00a0\u00a0\u00a0 prot opt source\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 destination <\/p>\n

<\/span> 3.\u00a0\u8a2d\u5b9a\u958b\u6a5f\u6642\u555f\u52d5 iptables
# chkconfig –level 3 iptables on <\/span><\/p>\n

\u8f09\u5165\u76f8\u95dc\u6a21\u7d44
# grep MOD \/etc\/sysconfig\/iptables-config<\/span>
IPTABLES_MODULES=”ip_conntrack_netbios_ns ip_conntrack_ftp”<\/span>
IPTABLES_MODULES_UNLOAD=”yes”<\/span><\/p>\n

# service iptables restart<\/span>
iptables\uff1a\u6b63\u5728\u6e05\u9664\u9632\u706b\u7246\u898f\u5247\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 [\u00a0 \u78ba\u5b9a\u00a0 ]<\/span>
iptables\uff1a\u6b63\u5728\u8a2d\u5b9a chains \u70ba ACCEPT \u653f\u7b56\uff1afilter\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 [\u00a0 \u78ba\u5b9a\u00a0 ]<\/span>
iptables\uff1a\u6b63\u5728\u5378\u8f09\u6a21\u7d44\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 [\u00a0 \u78ba\u5b9a\u00a0 ]<\/span>
iptables\uff1a\u6b63\u5728\u5957\u7528\u9632\u706b\u7246\u898f\u5247\uff1a\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 [\u00a0 \u78ba\u5b9a\u00a0 ]<\/span>
iptables\uff1a\u6b63\u5728\u8f09\u5165\u984d\u5916\u7684\u6a21\u7d44\uff1aip_conntrack_netbios_ns ip_co[\u00a0 \u78ba\u5b9a\u00a0 ]p<\/span><\/p>\n

# lsmod | grep ftp<\/span>
nf_conntrack_ftp\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 12913\u00a0 0<\/span>
nf_conntrack\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 79645\u00a0 5 nf_conntrack_ftp,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_conntrack_ipv4,xt_state<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e4b\u524d\u90fd\u662f\u5148\u628a Firewall\u00a0\u7684\u898f\u5247\u5beb\u5728\u55ae\u4e00 Script\u00a0\u4e2d\uff0c\u7136\u5f8c\u5728\u958b\u6a5f\u6642\u57f7\u884c\uff0c\u73fe\u5728\u6539\u7528\u5728 \/etc\/sy … <\/p>\n

\u95b1\u8b80\u5168\u6587\u3008\u8a2d\u5b9a Linux \u4e0a\u7684\u9632\u706b\u7246\u3009<\/span><\/a><\/p>\n","protected":false},"author":55,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138,132],"tags":[],"class_list":["post-18084","post","type-post","status-publish","format-standard","hentry","category-c-78483","category-c-78477"],"meta_key":{"_encloseme":["1"],"lt_post_id":["441617"]},"_links":{"self":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18084"}],"collection":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/comments?post=18084"}],"version-history":[{"count":0,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/posts\/18084\/revisions"}],"wp:attachment":[{"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/media?parent=18084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/categories?post=18084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/2blog.ilc.edu.tw\/25793\/wp-json\/wp\/v2\/tags?post=18084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}