{"id":52066,"date":"2024-12-03T15:56:37","date_gmt":"2024-12-03T07:56:37","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52066\/"},"modified":"2024-12-03T15:56:37","modified_gmt":"2024-12-03T07:56:37","slug":"%e5%a6%82%e4%bd%95%e5%a2%9e%e5%bc%balinux%e5%92%8cunix%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e5%ae%89%e5%85%a8%e6%80%a7","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52066\/","title":{"rendered":"\u5982\u4f55\u589e\u5f3aLinux\u548cUnix\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u589e\u5f3aLinux\u548cUnix\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027<\/h1>\n

\u76ee\u524d\u7c73\u4e91\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u589e\u5f3aLinux\u548cUnix\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6587\u7ae0<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

\u4e00\u3001\u7cfb\u7edf\u5b89\u5168\u8bb0\u5f55\u6587\u4ef6<\/strong><\/p>\n

\u64cd\u4f5c\u7cfb\u7edf\u5185\u90e8\u7684\u8bb0\u5f55\u6587\u4ef6\u662f\u68c0\u6d4b\u662f\u5426\u6709\u7f51\u7edc\u5165\u4fb5\u7684\u91cd\u8981\u7ebf\u7d22\u3002\u5982\u679c\u60a8\u7684\u7cfb\u7edf\u662f\u76f4\u63a5\u8fde\u5230internet\uff0c\u60a8\u53d1\u73b0\u6709\u5f88\u591a\u4eba\u5bf9\u60a8\u7684\u7cfb\u7edf\u505atelnet\/ftp\u767b\u5f55\u5c1d\u8bd5\uff0c\u53ef\u4ee5\u8fd0\u884c”#more \/var\/log\/secure grep refused”\u6765\u68c0\u67e5\u7cfb\u7edf\u6240\u53d7\u5230\u7684\u653b\u51fb\uff0c\u4ee5\u4fbf\u91c7\u53d6\u76f8\u5e94\u7684\u5bf9\u7b56\uff0c\u5982\u4f7f\u7528ssh\u6765\u66ff\u6362telnet\/rlogin\u7b49\u3002<\/p>\n

\u4e8c\u3001\u542f\u52a8\u548c\u767b\u5f55\u5b89\u5168\u6027<\/strong><\/p>\n

1\uff0ebios\u5b89\u5168<\/p>\n

\u8bbe\u7f6ebios\u5bc6\u7801\u4e14\u4fee\u6539\u5f15\u5bfc\u6b21\u5e8f\u7981\u6b62\u4ece\u8f6f\u76d8\u542f\u52a8\u7cfb\u7edf\u3002<\/p>\n

2\uff0e\u7528\u6237\u53e3\u4ee4<\/p>\n

\u7528\u6237\u53e3\u4ee4\u662flinux\u5b89\u5168\u7684\u4e00\u4e2a\u57fa\u672c\u8d77\u70b9\uff0c\u5f88\u591a\u4eba\u4f7f\u7528\u7684\u7528\u6237\u53e3\u4ee4\u8fc7\u4e8e\u7b80\u5355\uff0c\u8fd9\u7b49\u4e8e\u7ed9\u4fb5\u5165\u8005\u655e\u5f00\u4e86\u5927\u95e8\uff0c\u867d\u7136\u4ece\u7406\u8bba\u4e0a\u8bf4\uff0c\u53ea\u8981\u6709\u8db3\u591f\u7684\u65f6\u95f4\u548c\u8d44\u6e90\u53ef\u4ee5\u5229\u7528\uff0c\u5c31\u6ca1\u6709\u4e0d\u80fd\u7834\u89e3\u7684\u7528\u6237\u53e3\u4ee4\uff0c\u4f46\u9009\u53d6\u5f97\u5f53\u7684\u53e3\u4ee4\u662f\u96be\u4e8e\u7834\u89e3\u7684\u3002\u8f83\u597d\u7684\u7528\u6237\u53e3\u4ee4\u662f\u90a3\u4e9b\u53ea\u6709\u4ed6\u81ea\u5df1\u5bb9\u6613\u8bb0\u5f97\u5e76\u7406\u89e3\u7684\u4e00\u4e32\u5b57\u7b26\uff0c\u5e76\u4e14\u7edd\u5bf9\u4e0d\u8981\u5728\u4efb\u4f55\u5730\u65b9\u5199\u51fa\u6765\u3002<\/p>\n

3\uff0e\u9ed8\u8ba4\u8d26\u53f7<\/p>\n

\u5e94\u8be5\u7981\u6b62\u6240\u6709\u9ed8\u8ba4\u7684\u88ab\u64cd\u4f5c\u7cfb\u7edf\u672c\u8eab\u542f\u52a8\u7684\u5e76\u4e14\u4e0d\u5fc5\u8981\u7684\u8d26\u53f7\uff0c\u5f53\u60a8\u7b2c\u4e00\u6b21\u5b89\u88c5\u7cfb\u7edf\u65f6\u5c31\u5e94\u8be5\u8fd9\u4e48\u505a\uff0clinux\u63d0\u4f9b\u4e86\u5f88\u591a\u9ed8\u8ba4\u8d26\u53f7\uff0c\u800c\u8d26\u53f7\u8d8a\u591a\uff0c\u7cfb\u7edf\u5c31\u8d8a\u5bb9\u6613\u53d7\u5230\u653b\u51fb\u3002<\/p>\n

\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u5220\u9664\u8d26\u53f7\u3002<\/p>\n

# userdel\u7528\u6237\u540d<\/pre>\n
\u6216\u8005\u7528\u4ee5\u4e0b\u7684\u547d\u4ee4\u5220\u9664\u7ec4\u7528\u6237\u8d26\u53f7\u3002<\/p>\n
# groupdel username<\/pre>\n
4\uff0e\u53e3\u4ee4\u6587\u4ef6<\/p>\n
chattr\u547d\u4ee4\u7ed9\u4e0b\u9762\u7684\u6587\u4ef6\u52a0\u4e0a\u4e0d\u53ef\u66f4\u6539\u5c5e\u6027\uff0c\u4ece\u800c\u9632\u6b62\u975e\u6388\u6743\u7528\u6237\u83b7\u5f97\u6743\u9650\u3002<\/p>\n
# chattr +i \/etc\/passwd\n\n# chattr +i \/etc\/shadow\n\n# chattr +i \/etc\/group\n\n# chattr +i \/etc\/gshadow<\/pre>\n
5\uff0e\u7981\u6b62ctrl+alt+delete\u91cd\u65b0\u542f\u52a8\u673a\u5668\u547d\u4ee4<\/p>\n
\u4fee\u6539\/etc\/inittab\u6587\u4ef6\uff0c\u5c06”ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now<\/code>“\u4e00\u884c\u6ce8\u91ca\u6389\u3002\u7136\u540e\u91cd\u65b0\u8bbe\u7f6e\/etc\/rc.d\/init.d\/\u76ee\u5f55\u4e0b\u6240\u6709\u6587\u4ef6\u7684\u8bb8\u53ef\u6743\u9650\uff0c\u8fd0\u884c\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n
# chmod -r 700 \/etc\/rc.d\/init.d\/*<\/pre>\n
\u8fd9\u6837\u4fbf\u4ec5\u6709root\u53ef\u4ee5\u8bfb\u3001\u5199\u6216\u6267\u884c\u4e0a\u8ff0\u6240\u6709\u811a\u672c\u6587\u4ef6\u3002<\/p>\n
6\uff0e\u9650\u5236su\u547d\u4ee4<\/p>\n
\u5982\u679c\u60a8\u4e0d\u60f3\u4efb\u4f55\u4eba\u80fd\u591fsu\u4f5c\u4e3aroot\uff0c\u53ef\u4ee5\u7f16\u8f91\/etc\/pam.d\/su\u6587\u4ef6\uff0c\u589e\u52a0\u5982\u4e0b\u4e24\u884c\uff1a<\/p>\n
auth sufficient \/lib\/security\/pam_rootok.so debug\n\nauth required \/lib\/security\/pam_wheel.so group=isd<\/pre>\n
\u8fd9\u65f6\uff0c\u4ec5isd\u7ec4\u7684\u7528\u6237\u53ef\u4ee5su\u4f5c\u4e3aroot\u3002\u6b64\u540e\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u7528\u6237admin\u80fd\u591fsu\u4f5c\u4e3aroot\uff0c\u53ef\u4ee5\u8fd0\u884c\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n
# usermod -g10 admin<\/pre>\n
7\uff0e\u5220\u51cf\u767b\u5f55\u4fe1\u606f<\/p>\n
\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u767b\u5f55\u63d0\u793a\u4fe1\u606f\u5305\u62eclinux\u53d1\u884c\u7248\u3001\u5185\u6838\u7248\u672c\u540d\u548c\u670d\u52a1\u5668\u4e3b\u673a\u540d\u7b49\u3002\u5bf9\u4e8e\u4e00\u53f0\u5b89\u5168\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u673a\u5668\u6765\u8bf4\u8fd9\u6837\u6cc4\u6f0f\u4e86\u8fc7\u591a\u7684\u4fe1\u606f\u3002\u53ef\u4ee5\u7f16\u8f91\/etc\/rc.d\/rc.local\u5c06\u8f93\u51fa\u7cfb\u7edf\u4fe1\u606f\u7684\u5982\u4e0b\u884c\u6ce8\u91ca\u6389\u3002<\/p>\n
# this will overwrite \/etc\/issue at every boot. so\uff0c make any changes you\n\n# want to make to \/etc\/issue here or you will lose them when you reboot.\n\n# echo \"\" > \/etc\/issue\n\n# echo \"$r\" >> \/etc\/issue\n\n# echo \"kernel $(uname -r) on $a $(uname -m)\" >> \/etc\/issue\n\n# cp -f \/etc\/issue \/etc\/issue.net\n\n# echo >> \/etc\/issue<\/pre>\n
\u7136\u540e\uff0c\u8fdb\u884c\u5982\u4e0b\u64cd\u4f5c\uff1a<\/p>\n
# rm -f \/etc\/issue\n\n# rm -f \/etc\/issue.net\n\n# touch \/etc\/issue\n\n# touch \/etc\/issue.net<\/pre>\n
\u4e09\u3001\u9650\u5236\u7f51\u7edc\u8bbf\u95ee<\/strong><\/p>\n
1\uff0enfs\u8bbf\u95ee<\/p>\n
\u5982\u679c\u60a8\u4f7f\u7528nfs\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf\u670d\u52a1\uff0c\u5e94\u8be5\u786e\u4fdd\u60a8\u7684\/etc\/exports\u5177\u6709\u6700\u4e25\u683c\u7684\u8bbf\u95ee\u6743\u9650\u8bbe\u7f6e\uff0c\u4e5f\u5c31\u662f\u610f\u5473\u7740\u4e0d\u8981\u4f7f\u7528\u4efb\u4f55\u901a\u914d\u7b26\u3001\u4e0d\u5141\u8bb8root\u5199\u6743\u9650\u5e76\u4e14\u53ea\u80fd\u5b89\u88c5\u4e3a\u53ea\u8bfb\u6587\u4ef6\u7cfb\u7edf\u3002\u7f16\u8f91\u6587\u4ef6\/etc\/exports\u5e76\u52a0\u5165\u5982\u4e0b\u4e24\u884c\u3002<\/p>\n
\/dir\/to\/export host1.mydomain.com(ro\uff0croot_squash)\n\n\/dir\/to\/export host2.mydomain.com(ro\uff0croot_squash)<\/pre>\n
\/dir\/to\/export \u662f\u60a8\u60f3\u8f93\u51fa\u7684\u76ee\u5f55\uff0chost.mydomain.com\u662f\u767b\u5f55\u8fd9\u4e2a\u76ee\u5f55\u7684\u673a\u5668\u540d\uff0cro\u610f\u5473\u7740mount\u6210\u53ea\u8bfb\u7cfb\u7edf\uff0croot_squash\u7981\u6b62root\u5199\u5165\u8be5\u76ee\u5f55\u3002\u4e3a\u4e86\u4f7f\u6539\u52a8\u751f\u6548\uff0c\u8fd0\u884c\u5982\u4e0b\u547d\u4ee4\u3002<\/p>\n
# \/usr\/sbin\/exportfs -a<\/pre>\n
2\uff0einetd\u8bbe\u7f6e<\/p>\n
\u9996\u5148\u8981\u786e\u8ba4\/etc\/inetd.conf\u7684\u6240\u6709\u8005\u662froot\uff0c\u4e14\u6587\u4ef6\u6743\u9650\u8bbe\u7f6e\u4e3a600\u3002\u8bbe\u7f6e\u5b8c\u6210\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528”stat<\/code>“\u547d\u4ee4\u8fdb\u884c\u68c0\u67e5\u3002<\/p>\n
# chmod 600 \/etc\/inetd.conf<\/pre>\n
\u7136\u540e\uff0c\u7f16\u8f91\/etc\/inetd.conf\u7981\u6b62\u4ee5\u4e0b\u670d\u52a1\u3002<\/p>\n
ftp telnet shell login exec talk ntalk imap pop-2 pop-3 finger auth<\/pre>\n
\u5982\u679c\u60a8\u5b89\u88c5\u4e86ssh\/scp\uff0c\u4e5f\u53ef\u4ee5\u7981\u6b62\u6389telnet\/ftp\u3002\u4e3a\u4e86\u4f7f\u6539\u53d8\u751f\u6548\uff0c\u8fd0\u884c\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n
#killall -hup inetd<\/pre>\n
\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u591a\u6570linux\u7cfb\u7edf\u5141\u8bb8\u6240\u6709\u7684\u8bf7\u6c42\uff0c\u800c\u7528tcp_wrappers\u589e\u5f3a\u7cfb\u7edf\u5b89\u5168\u6027\u662f\u4e3e\u624b\u4e4b\u52b3\uff0c\u60a8\u53ef\u4ee5\u4fee\u6539\/etc \/hosts.deny\u548c\/etc\/hosts.allow\u6765\u589e\u52a0\u8bbf\u95ee\u9650\u5236\u3002\u4f8b\u5982\uff0c\u5c06\/etc\/hosts.deny\u8bbe\u4e3a”all: all”\u53ef\u4ee5\u9ed8\u8ba4\u62d2\u7edd\u6240\u6709\u8bbf\u95ee\u3002\u7136\u540e\u5728\/etc\/hosts.allow\u6587\u4ef6\u4e2d\u6dfb\u52a0\u5141\u8bb8\u7684\u8bbf\u95ee\u3002\u4f8b\u5982\uff0c”sshd: 192.168.1.10\/255.255.255.0 gate.openarch.com”\u8868\u793a\u5141\u8bb8ip\u5730\u5740192.168.1.10\u548c\u4e3b\u673a\u540dgate.openarch.com\u5141\u8bb8\u901a\u8fc7ssh\u8fde\u63a5\u3002<\/p>\n
\u914d\u7f6e\u5b8c\u6210\u540e\uff0c\u53ef\u4ee5\u7528tcpdchk\u68c0\u67e5:<\/p>\n
# tcpdchk\u3000<\/pre>\n
tcpchk\u662ftcp_wrapper\u914d\u7f6e\u68c0\u67e5\u5de5\u5177\uff0c\u5b83\u68c0\u67e5\u60a8\u7684tcp wrapper\u914d\u7f6e\u5e76\u62a5\u544a\u6240\u6709\u53d1\u73b0\u7684\u6f5c\u5728\/\u5b58\u5728\u7684\u95ee\u9898\u3002<\/p>\n
3\uff0e\u767b\u5f55\u7ec8\u7aef\u8bbe\u7f6e<\/p>\n
\/etc\/securetty\u6587\u4ef6\u6307\u5b9a\u4e86\u5141\u8bb8root\u767b\u5f55\u7684tty\u8bbe\u5907\uff0c\u7531\/bin\/login\u7a0b\u5e8f\u8bfb\u53d6\uff0c\u5176\u683c\u5f0f\u662f\u4e00\u4e2a\u88ab\u5141\u8bb8\u7684\u540d\u5b57\u5217\u8868\uff0c\u60a8\u53ef\u4ee5\u7f16\u8f91\/etc\/securetty\u4e14\u6ce8\u91ca\u6389\u5982\u4e0b\u7684\u884c\u3002<\/p>\n
# tty1\n\n# tty2\n\n# tty3\n\n# tty4\n\n# tty5\n\n# tty6<\/pre>\n
\u8fd9\u65f6\uff0croot\u4ec5\u53ef\u5728tty1\u7ec8\u7aef\u767b\u5f55\u3002<\/p>\n
4\uff0e\u907f\u514d\u663e\u793a\u7cfb\u7edf\u548c\u7248\u672c\u4fe1\u606f\u3002<\/p>\n
\u5982\u679c\u60a8\u5e0c\u671b\u8fdc\u7a0b\u767b\u5f55\u7528\u6237\u770b\u4e0d\u5230\u7cfb\u7edf\u548c\u7248\u672c\u4fe1\u606f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e0b\u64cd\u4f5c\u6539\u53d8\/etc\/inetd.conf\u6587\u4ef6\uff1a<\/p>\n
telnet stream tcp nowait root \/usr\/sbin\/tcpd in.telnetd -<\/pre>\n
\u52a0-h\u8868\u793atelnet\u4e0d\u663e\u793a\u7cfb\u7edf\u4fe1\u606f\uff0c\u800c\u4ec5\u4ec5\u663e\u793a”login:”\u3002<\/p>\n
\u56db\u3001\u9632\u6b62\u653b\u51fb<\/strong><\/p>\n
1\uff0e\u963b\u6b62ping \u5982\u679c\u6ca1\u4eba\u80fdping\u901a\u60a8\u7684\u7cfb\u7edf\uff0c\u5b89\u5168\u6027\u81ea\u7136\u589e\u52a0\u4e86\u3002\u4e3a\u6b64\uff0c\u53ef\u4ee5\u5728\/etc\/rc.d\/rc.local\u6587\u4ef6\u4e2d\u589e\u52a0\u5982\u4e0b\u4e00\u884c\uff1a<\/p>\n
echo 1 > \/proc\/sys\/net\/ipv4\/icmp_echo_ignore_all<\/pre>\n
2\uff0e\u9632\u6b62ip\u6b3a\u9a97<\/p>\n
\u7f16\u8f91host.conf\u6587\u4ef6\u5e76\u589e\u52a0\u5982\u4e0b\u51e0\u884c\u6765\u9632\u6b62ip\u6b3a\u9a97\u653b\u51fb\u3002<\/p>\n
order bind\uff0chosts\n\nmulti off\n\nnospoof on\u3000<\/pre>\n
3\uff0e\u9632\u6b62dos\u653b\u51fb<\/p>\n
\u5bf9\u7cfb\u7edf\u6240\u6709\u7684\u7528\u6237\u8bbe\u7f6e\u8d44\u6e90\u9650\u5236\u53ef\u4ee5\u9632\u6b62dos\u7c7b\u578b\u653b\u51fb\u3002\u5982\u6700\u5927\u8fdb\u7a0b\u6570\u548c\u5185\u5b58\u4f7f\u7528\u6570\u91cf\u7b49\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728\/etc\/security\/limits.conf\u4e2d\u6dfb\u52a0\u5982\u4e0b\u51e0\u884c\uff1a<\/p>\n
    \n
  • \n
    * hard core 0<\/p>\n<\/li>\n
  • \n
    * hard rss 5000<\/p>\n<\/li>\n
  • \n
    * hard nproc 20<\/p>\n<\/li>\n<\/ul>\n
    \u7136\u540e\u5fc5\u987b\u7f16\u8f91\/etc\/pam.d\/login\u6587\u4ef6\u68c0\u67e5\u4e0b\u9762\u4e00\u884c\u662f\u5426\u5b58\u5728\u3002<\/p>\n
    session required \/lib\/security\/pam_limits.so<\/pre>\n
    \u4e0a\u9762\u7684\u547d\u4ee4\u7981\u6b62\u8c03\u8bd5\u6587\u4ef6\uff0c\u9650\u5236\u8fdb\u7a0b\u6570\u4e3a50\u5e76\u4e14\u9650\u5236\u5185\u5b58\u4f7f\u7528\u4e3a5mb\u3002<\/p>\n
    \u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u589e\u5f3aLinux\u548cUnix\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027 \u76ee\u524d\u7c73\u4e91\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u589e\u5f3aLinux\u548cUnix\u670d\u52a1\u5668\u7684\u5b89\u5168\u6027\u300b\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6587\u7ae0\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~ \u4e00\u3001\u7cfb\u7edf\u5b89\u5168\u8bb0\u5f55\u6587\u4ef6 \u64cd\u4f5c\u7cfb\u7edf\u5185\u90e8\u7684\u8bb0\u5f55\u6587\u4ef6\u662f\u68c0\u6d4b\u662f\u5426\u6709\u7f51\u7edc\u5165\u4fb5\u7684\u91cd\u8981\u7ebf\u7d22\u3002\u5982\u679c\u60a8\u7684\u7cfb\u7edf\u662f\u76f4\u63a5\u8fde\u5230internet\uff0c\u60a8\u53d1\u73b0\u6709\u5f88\u591a\u4eba\u5bf9\u60a8\u7684\u7cfb\u7edf\u505atelnet\/ftp\u767b\u5f55\u5c1d\u8bd5\uff0c\u53ef\u4ee5\u8fd0\u884c”#more \/var\/log\/secure grep refused”\u6765\u68c0\u67e5\u7cfb\u7edf\u6240\u53d7\u5230\u7684\u653b\u51fb\uff0c\u4ee5\u4fbf\u91c7\u53d6\u76f8\u5e94\u7684\u5bf9\u7b56\uff0c\u5982\u4f7f\u7528ssh\u6765\u66ff\u6362telnet\/rlogin\u7b49\u3002 \u4e8c\u3001\u542f\u52a8\u548c\u767b\u5f55\u5b89\u5168\u6027 1\uff0ebios\u5b89\u5168 \u8bbe\u7f6ebios\u5bc6\u7801\u4e14\u4fee\u6539\u5f15\u5bfc\u6b21\u5e8f\u7981\u6b62\u4ece\u8f6f\u76d8\u542f\u52a8\u7cfb\u7edf\u3002 2\uff0e\u7528\u6237\u53e3\u4ee4 \u7528\u6237\u53e3\u4ee4\u662flinux\u5b89\u5168\u7684\u4e00\u4e2a\u57fa\u672c\u8d77\u70b9\uff0c\u5f88\u591a\u4eba\u4f7f\u7528\u7684\u7528\u6237\u53e3\u4ee4\u8fc7\u4e8e\u7b80\u5355\uff0c\u8fd9\u7b49\u4e8e\u7ed9\u4fb5\u5165\u8005\u655e\u5f00\u4e86\u5927\u95e8\uff0c\u867d\u7136\u4ece\u7406\u8bba\u4e0a\u8bf4\uff0c\u53ea\u8981\u6709\u8db3\u591f\u7684\u65f6\u95f4\u548c\u8d44\u6e90\u53ef\u4ee5\u5229\u7528\uff0c\u5c31\u6ca1\u6709\u4e0d\u80fd\u7834\u89e3\u7684\u7528\u6237\u53e3\u4ee4\uff0c\u4f46\u9009\u53d6\u5f97\u5f53\u7684\u53e3\u4ee4\u662f\u96be\u4e8e\u7834\u89e3\u7684\u3002\u8f83\u597d\u7684\u7528\u6237\u53e3\u4ee4\u662f\u90a3\u4e9b\u53ea\u6709\u4ed6\u81ea\u5df1\u5bb9\u6613\u8bb0\u5f97\u5e76\u7406\u89e3\u7684\u4e00\u4e32\u5b57\u7b26\uff0c\u5e76\u4e14\u7edd\u5bf9\u4e0d\u8981\u5728\u4efb\u4f55\u5730\u65b9\u5199\u51fa\u6765\u3002 3\uff0e\u9ed8\u8ba4\u8d26\u53f7 \u5e94\u8be5\u7981\u6b62\u6240\u6709\u9ed8\u8ba4\u7684\u88ab\u64cd\u4f5c\u7cfb\u7edf\u672c\u8eab\u542f\u52a8\u7684\u5e76\u4e14\u4e0d\u5fc5\u8981\u7684\u8d26\u53f7\uff0c\u5f53\u60a8\u7b2c\u4e00\u6b21\u5b89\u88c5\u7cfb\u7edf\u65f6\u5c31\u5e94\u8be5\u8fd9\u4e48\u505a\uff0clinux\u63d0\u4f9b\u4e86\u5f88\u591a\u9ed8\u8ba4\u8d26\u53f7\uff0c\u800c\u8d26\u53f7\u8d8a\u591a\uff0c\u7cfb\u7edf\u5c31\u8d8a\u5bb9\u6613\u53d7\u5230\u653b\u51fb\u3002 \u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u5220\u9664\u8d26\u53f7\u3002 # userdel\u7528\u6237\u540d \u6216\u8005\u7528\u4ee5\u4e0b\u7684\u547d\u4ee4\u5220\u9664\u7ec4\u7528\u6237\u8d26\u53f7\u3002 # groupdel username 4\uff0e\u53e3\u4ee4\u6587\u4ef6 chattr\u547d\u4ee4\u7ed9\u4e0b\u9762\u7684\u6587\u4ef6\u52a0\u4e0a\u4e0d\u53ef\u66f4\u6539\u5c5e\u6027\uff0c\u4ece\u800c\u9632\u6b62\u975e\u6388\u6743\u7528\u6237\u83b7\u5f97\u6743\u9650\u3002 # chattr +i \/etc\/passwd # chattr +i \/etc\/shadow # chattr +i \/etc\/group # chattr +i \/etc\/gshadow 5\uff0e\u7981\u6b62ctrl+alt+delete\u91cd\u65b0\u542f\u52a8\u673a\u5668\u547d\u4ee4 \u4fee\u6539\/etc\/inittab\u6587\u4ef6\uff0c\u5c06”ca::ctrlaltdel:\/sbin\/shutdown -t3 -r now“\u4e00\u884c\u6ce8\u91ca\u6389\u3002\u7136\u540e\u91cd\u65b0\u8bbe\u7f6e\/etc\/rc.d\/init.d\/\u76ee\u5f55\u4e0b\u6240\u6709\u6587\u4ef6\u7684\u8bb8\u53ef\u6743\u9650\uff0c\u8fd0\u884c\u5982\u4e0b\u547d\u4ee4\uff1a # chmod -r 700 \/etc\/rc.d\/init.d\/* \u8fd9\u6837\u4fbf\u4ec5\u6709root\u53ef\u4ee5\u8bfb\u3001\u5199\u6216\u6267\u884c\u4e0a\u8ff0\u6240\u6709\u811a\u672c\u6587\u4ef6\u3002 6\uff0e\u9650\u5236su\u547d\u4ee4 \u5982\u679c\u60a8\u4e0d\u60f3\u4efb\u4f55\u4eba\u80fd\u591fsu\u4f5c\u4e3aroot\uff0c\u53ef\u4ee5\u7f16\u8f91\/etc\/pam.d\/su\u6587\u4ef6\uff0c\u589e\u52a0\u5982\u4e0b\u4e24\u884c\uff1a auth sufficient \/lib\/security\/pam_rootok.so debug auth required \/lib\/security\/pam_wheel.so group=isd \u8fd9\u65f6\uff0c\u4ec5isd\u7ec4\u7684\u7528\u6237\u53ef\u4ee5su\u4f5c\u4e3aroot\u3002\u6b64\u540e\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u7528\u6237admin\u80fd\u591fsu\u4f5c\u4e3aroot\uff0c\u53ef\u4ee5\u8fd0\u884c\u5982\u4e0b\u547d\u4ee4\uff1a # usermod -g10 admin 7\uff0e\u5220\u51cf\u767b\u5f55\u4fe1\u606f \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u767b\u5f55\u63d0\u793a\u4fe1\u606f\u5305\u62eclinux\u53d1\u884c\u7248\u3001\u5185\u6838\u7248\u672c\u540d\u548c\u670d\u52a1\u5668\u4e3b\u673a\u540d\u7b49\u3002\u5bf9\u4e8e\u4e00\u53f0\u5b89\u5168\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u673a\u5668\u6765\u8bf4\u8fd9\u6837\u6cc4\u6f0f\u4e86\u8fc7\u591a\u7684\u4fe1\u606f\u3002\u53ef\u4ee5\u7f16\u8f91\/etc\/rc.d\/rc.local\u5c06\u8f93\u51fa\u7cfb\u7edf\u4fe1\u606f\u7684\u5982\u4e0b\u884c\u6ce8\u91ca\u6389\u3002 # this will overwrite \/etc\/issue at every boot. so\uff0c make any changes you # want to make to \/etc\/issue here or you will lose them when you reboot. # echo “” > \/etc\/issue # echo “$r” >> \/etc\/issue # echo “kernel $(uname -r) on $a $(uname -m)” >> \/etc\/issue # cp -f \/etc\/issue \/etc\/issue.net # echo >> \/etc\/issue \u7136\u540e\uff0c\u8fdb\u884c\u5982\u4e0b\u64cd\u4f5c\uff1a # rm -f \/etc\/issue # rm -f \/etc\/issue.net # touch \/etc\/issue # touch \/etc\/issue.net \u4e09\u3001\u9650\u5236\u7f51\u7edc\u8bbf\u95ee 1\uff0enfs\u8bbf\u95ee \u5982\u679c\u60a8\u4f7f\u7528nfs\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf\u670d\u52a1\uff0c\u5e94\u8be5\u786e\u4fdd\u60a8\u7684\/etc\/exports\u5177\u6709\u6700\u4e25\u683c\u7684\u8bbf\u95ee\u6743\u9650\u8bbe\u7f6e\uff0c\u4e5f\u5c31\u662f\u610f\u5473\u7740\u4e0d\u8981\u4f7f\u7528\u4efb\u4f55\u901a\u914d\u7b26\u3001\u4e0d\u5141\u8bb8root\u5199\u6743\u9650\u5e76\u4e14\u53ea\u80fd\u5b89\u88c5\u4e3a\u53ea\u8bfb\u6587\u4ef6\u7cfb\u7edf\u3002\u7f16\u8f91\u6587\u4ef6\/etc\/exports\u5e76\u52a0\u5165\u5982\u4e0b\u4e24\u884c\u3002 \/dir\/to\/export host1.mydomain.com(ro\uff0croot_squash) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-52066","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=52066"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52066\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=52066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=52066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=52066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}