{"id":209150,"date":"2025-09-30T05:45:30","date_gmt":"2025-09-29T21:45:30","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209150\/"},"modified":"2025-09-30T05:45:31","modified_gmt":"2025-09-29T21:45:31","slug":"vps-208","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209150\/","title":{"rendered":"\u9999\u6e2fVPS\u591a\u7528\u6237\u6743\u9650\u51b2\u7a81\uff1a\u5feb\u901f\u5b9a\u4f4d\u4e0e\u5f7b\u5e95\u4fee\u590d\u6307\u5357"},"content":{"rendered":"<p>\u5728\u591a\u79df\u6237\u6216\u591a\u4eba\u534f\u4f5c\u7684\u9999\u6e2fVPS\u73af\u5883\u4e2d\uff0c\u6743\u9650\u51b2\u7a81\u662f\u5e38\u89c1\u4e14\u4ee4\u4eba\u5934\u75bc\u7684\u95ee\u9898\u3002\u65e0\u8bba\u662f\u5171\u4eab\u4e3b\u673a\u4e0a\u4e0d\u540c\u7528\u6237\u95f4\u7684\u6587\u4ef6\u8bbf\u95ee\u51b2\u7a81\uff0c\u8fd8\u662f\u670d\u52a1\u8fdb\u7a0b\u56e0\u6743\u9650\u4e0d\u5f53\u800c\u65e0\u6cd5\u542f\u52a8\uff0c\u90fd\u4f1a\u76f4\u63a5\u5f71\u54cd\u7ad9\u70b9\u7a33\u5b9a\u6027\u548c\u6570\u636e\u5b89\u5168\u3002\u672c\u6587\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u89e3\u6790\u591a\u7528\u6237\u6743\u9650\u51b2\u7a81\u7684\u6210\u56e0\u3001\u5feb\u901f\u5b9a\u4f4d\u65b9\u6cd5\u3001\u5f7b\u5e95\u4fee\u590d\u6b65\u9aa4\u4ee5\u53ca\u957f\u671f\u9884\u9632\u7b56\u7565\uff0c\u5e76\u5728\u5173\u952e\u5904\u5bf9\u6bd4\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u7f8e\u56fdVPS\/\u7f8e\u56fd\u670d\u52a1\u5668\u5728\u7f51\u7edc\u4e0e\u5408\u89c4\u5c42\u9762\u7684\u5dee\u5f02\uff0c\u4ee5\u4fbf\u5728\u9009\u8d2d\u4e0e\u8fd0\u7ef4\u65f6\u505a\u51fa\u66f4\u5408\u7406\u7684\u51b3\u7b56\u3002<\/p>\n<h2>\u591a\u7528\u6237\u6743\u9650\u51b2\u7a81\u7684\u539f\u7406\u4e0e\u5e38\u89c1\u89e6\u53d1\u573a\u666f<\/h2>\n<p>\u591a\u7528\u6237\u6743\u9650\u51b2\u7a81\u672c\u8d28\u4e0a\u662f\u64cd\u4f5c\u7cfb\u7edf\u8bbf\u95ee\u63a7\u5236\u7b56\u7565\u3001\u6587\u4ef6\/\u76ee\u5f55\u6743\u9650\u8bbe\u7f6e\u3001\u8fdb\u7a0b\u80fd\u529b\u4e0e\u7528\u6237\u8eab\u4efd\uff08UID\/GID\uff09\u4e4b\u95f4\u4e0d\u5339\u914d\u5bfc\u81f4\u7684\u8d44\u6e90\u8bbf\u95ee\u5931\u8d25\u6216\u8d8a\u6743\u8bbf\u95ee\u3002\u5e38\u89c1\u89e6\u53d1\u573a\u666f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u591a\u4e2a\u5f00\u53d1\u8005\u6216\u81ea\u52a8\u5316\u90e8\u7f72\u811a\u672c\u4f7f\u7528\u4e0d\u540c\u7684\u7528\u6237\u6216\u7ec4\u521b\u5efa\u3001\u4fee\u6539\u6587\u4ef6\uff0c\u5bfc\u81f4\u6587\u4ef6\u5c5e\u4e3b\u548c\u6743\u9650\u4e0d\u4e00\u81f4\uff0c\u670d\u52a1\u65e0\u6cd5\u8bfb\u53d6\u6216\u5199\u5165\u3002<\/li>\n<li>\u4f7f\u7528 NFS\u3001Samba \u7b49\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf\u65f6\uff0cUID\/GID \u6620\u5c04\u4e0d\u4e00\u81f4\u5f15\u53d1\u7684\u6743\u9650\u9519\u914d\u3002<\/li>\n<li>SFTP\/FTP \u4e0e\u672c\u5730\u7528\u6237\u76ee\u5f55\u6743\u9650\u51b2\u7a81\uff0c\u5bfc\u81f4\u4e0a\u4f20\/\u4e0b\u8f7d\u5931\u8d25\u6216\u6743\u9650\u88ab\u610f\u5916\u6539\u5199\u3002<\/li>\n<li>\u8bef\u914d\u7f6e\u7684 sudoers\u3001PAM\u3001systemd unit \u6587\u4ef6\u6216\u5bb9\u5668\u8fd0\u884c\u65f6\u6743\u9650\u5bfc\u81f4\u8fdb\u7a0b\u65e0\u6cd5\u83b7\u53d6\u6240\u9700\u80fd\u529b\u3002<\/li>\n<li>ACL\uff08\u8bbf\u95ee\u63a7\u5236\u5217\u8868\uff09\u4e0e\u4f20\u7edf Unix \u6743\u9650\u6df7\u7528\uff0c\u5bfc\u81f4\u96be\u4ee5\u9884\u671f\u7684\u8bbf\u95ee\u884c\u4e3a\u3002<\/li>\n<\/ul>\n<h3>\u5e95\u5c42\u673a\u5236\u8981\u70b9<\/h3>\n<p>\u7406\u89e3\u4ee5\u4e0b\u51e0\u70b9\u6709\u52a9\u4e8e\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\uff1a<\/p>\n<ul>\n<li><strong>Unix \u6743\u9650\u6a21\u578b\uff08rwx + UID\/GID\uff09<\/strong>\uff1a\u7cfb\u7edf\u4f18\u5148\u4f9d\u636e\u6587\u4ef6\u5c5e\u4e3b\u3001\u5c5e\u7ec4\u548c\u5176\u4ed6\u7528\u6237\u7684\u4f4d\u8fdb\u884c\u6388\u6743\u5224\u65ad\u3002<\/li>\n<li><strong>ACL \u4e0e\u6269\u5c55\u6743\u9650<\/strong>\uff1asetfacl\/getfacl \u63d0\u4f9b\u6bd4\u4f20\u7edf\u6743\u9650\u66f4\u7ec6\u7c92\u5ea6\u7684\u63a7\u5236\uff0c\u4f46\u4e5f\u589e\u52a0\u4e86\u590d\u6742\u6027\u3002<\/li>\n<li><strong>\u8fdb\u7a0b\u80fd\u529b\u4e0e\u6743\u9650\u7ee7\u627f<\/strong>\uff1adaemon \u542f\u52a8\u7528\u6237\u3001systemd \u7684 User\/Group\u3001capabilities\uff08\u5982 CAP_NET_BIND_SERVICE\uff09\u4f1a\u5f71\u54cd\u8d44\u6e90\u8bbf\u95ee\u3002<\/li>\n<li><strong>\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf\u5dee\u5f02<\/strong>\uff1aNFS v3\/v4\u3001Samba \u5bf9 UID\/GID \u7684\u5904\u7406\u3001root squashing \u7b49\u90fd\u4f1a\u6539\u53d8\u8bbf\u95ee\u7ed3\u679c\u3002<\/li>\n<\/ul>\n<h2>\u5feb\u901f\u5b9a\u4f4d\uff1a\u7cfb\u7edf\u5316\u6392\u67e5\u6d41\u7a0b<\/h2>\n<p>\u9047\u5230\u6743\u9650\u51b2\u7a81\u65f6\uff0c\u6309\u6b65\u9aa4\u6392\u67e5\u80fd\u5927\u5e45\u7f29\u77ed\u4fee\u590d\u65f6\u95f4\u3002\u4ee5\u4e0b\u4e3a\u5b9e\u6218\u53ef\u590d\u7528\u7684\u68c0\u6d4b\u6d41\u7a0b\uff1a<\/p>\n<h3>1. \u590d\u73b0\u4e0e\u6536\u96c6\u4fe1\u606f<\/h3>\n<ul>\n<li>\u9996\u5148\u590d\u73b0\u51fa\u8bbf\u95ee\u5931\u8d25\u7684\u64cd\u4f5c\uff0c\u5e76\u8bb0\u5f55\u9519\u8bef\u4fe1\u606f\uff08\u65e5\u5fd7\u3001errno\uff09\u3002\u5e38\u89c1\u65e5\u5fd7\u4f4d\u7f6e\uff1a\/var\/log\/syslog\u3001\/var\/log\/auth.log\u3001\u670d\u52a1\u7279\u5b9a\u65e5\u5fd7\uff08\u5982 nginx\u3001apache\u3001ssh\uff09\u3002<\/li>\n<li>\u4f7f\u7528 <strong>ls -l<\/strong>\u3001<strong>stat<\/strong> \u68c0\u67e5\u76ee\u6807\u6587\u4ef6\/\u76ee\u5f55\u7684UID\/GID\u548c\u6743\u9650\u4f4d\uff1b\u4f7f\u7528 <strong>getfacl<\/strong> \u67e5\u770b\u662f\u5426\u5b58\u5728ACL\u3002<\/li>\n<li>\u786e\u8ba4\u8fdb\u7a0b\u8fd0\u884c\u7684\u7528\u6237\uff1a\u4f7f\u7528 <strong>ps aux | grep \u670d\u52a1\u540d<\/strong> \u6216 systemd \u7684 <strong>systemctl status<\/strong>\u3002<\/li>\n<\/ul>\n<h3>2. \u5feb\u901f\u547d\u4ee4\u6392\u67e5\u8981\u70b9<\/h3>\n<ul>\n<li>\u67e5\u770b\u6587\u4ef6\u6743\u9650\u4e0e\u5c5e\u4e3b\uff1a<strong>ls -lh \/path\/to\/file<\/strong><\/li>\n<li>\u67e5\u770b ACL\uff1a<strong>getfacl \/path\/to\/dir<\/strong><\/li>\n<li>\u68c0\u67e5\u8fdb\u7a0b\u8eab\u4efd\u4e0e\u6253\u5f00\u6587\u4ef6\uff1a<strong>ss -lntp<\/strong>\u3001<strong>lsof -p PID<\/strong><\/li>\n<li>\u5ba1\u8ba1\u5f02\u5e38\u8bbf\u95ee\uff08\u5fc5\u8981\u65f6\uff09\uff1a\u542f\u7528 auditd \u5e76\u7528 <strong>ausearch<\/strong> \u5206\u6790\u62d2\u7edd\u4e8b\u4ef6<\/li>\n<\/ul>\n<h3>3. \u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf\u4e0e\u5bb9\u5668\u7279\u6b8a\u68c0\u67e5<\/h3>\n<ul>\n<li>NFS\uff1a\u786e\u8ba4 \/etc\/exports \u4e0e mount \u9009\u9879\uff08\u5982 anonuid\/anongid\u3001root_squash\uff09\u3002<\/li>\n<li>Samba\uff1a\u68c0\u67e5 smb.conf \u7684 force user\/group\u3001map to guest \u548c valid users \u914d\u7f6e\u662f\u5426\u51b2\u7a81\u3002<\/li>\n<li>\u5bb9\u5668\uff08Docker\/LXC\uff09\uff1a\u6ce8\u610f\u5bb9\u5668\u5185 UID \u4e0e\u5bbf\u4e3b\u673a\u7684\u6620\u5c04\uff0c\u4f7f\u7528 userns-remap \u65f6\u9700\u989d\u5916\u8c03\u6574\u6587\u4ef6\u5c5e\u4e3b\u3002<\/li>\n<\/ul>\n<h2>\u5f7b\u5e95\u4fee\u590d\uff1a\u4ece\u5fae\u89c2\u4fee\u8865\u5230\u5b8f\u89c2\u7b56\u7565<\/h2>\n<p>\u5b9a\u4f4d\u95ee\u9898\u540e\uff0c\u4fee\u590d\u5de5\u4f5c\u5e94\u5305\u542b\u77ed\u671f\u4fee\u8865\uff08\u6062\u590d\u670d\u52a1\uff09\u4e0e\u957f\u671f\u7b56\u7565\uff08\u9632\u6b62\u590d\u53d1\uff09\u3002<\/p>\n<h3>\u77ed\u671f\u4fee\u8865\uff1a\u5feb\u901f\u6062\u590d\u670d\u52a1<\/h3>\n<ul>\n<li>\u5982\u679c\u662f\u5c5e\u4e3b\u4e0d\u5f53\uff1a\u4f7f\u7528 <strong>chown user:group \/path -R<\/strong> \u5c06\u6587\u4ef6\u548c\u76ee\u5f55\u8c03\u6574\u5230\u6b63\u786e\u5c5e\u4e3b\u3002<\/li>\n<li>\u5982\u679c\u662f\u6743\u9650\u4f4d\u95ee\u9898\uff1a\u4f7f\u7528 <strong>chmod<\/strong> \u6062\u590d\u6700\u5c0f\u53ef\u7528\u6743\u9650\uff08\u4f8b\u5982\u76ee\u5f55 750\u3001\u6587\u4ef6 640\uff09\uff0c\u907f\u514d\u76f4\u63a5\u4f7f\u7528 777\u3002<\/li>\n<li>\u4e34\u65f6\u5141\u8bb8\u670d\u52a1\u8bbf\u95ee\uff1a\u53ef\u7528 setfacl \u7ed9\u670d\u52a1\u8fd0\u884c\u7684\u7528\u6237\u6388\u4e88\u5177\u4f53\u6743\u9650\uff0c\u547d\u4ee4\u793a\u4f8b <strong>setfacl -m u:www-data:rwx \/path<\/strong>\uff08\u4fee\u590d\u540e\u5c3d\u5feb\u56de\u9000\u4e3a\u6700\u5c0f\u6743\u9650\uff09\u3002<\/li>\n<li>\u5982\u679c\u662f SELinux \u6216 AppArmor \u62d2\u7edd\uff1a\u67e5\u770b audit \u65e5\u5fd7\u5e76\u4f7f\u7528 audit2allow \u6216\u8c03\u6574 profile\uff0c\u91cd\u542f\u670d\u52a1\u524d\u505a\u597d\u7b56\u7565\u5907\u4efd\u3002<\/li>\n<\/ul>\n<h3>\u957f\u671f\u7b56\u7565\uff1a\u9884\u9632\u6743\u9650\u51b2\u7a81\u7684\u5236\u5ea6\u4e0e\u6280\u672f\u63aa\u65bd<\/h3>\n<ul>\n<li>\u7edf\u4e00 UID\/GID \u7b56\u7565\uff1a\u5bf9\u4e8e\u591a\u673a\u6216\u591a\u670d\u52a1\u573a\u666f\uff08\u5982\u9999\u6e2fVPS + \u7f8e\u56fdVPS \u6df7\u5408\u90e8\u7f72\uff09\uff0c\u5efa\u8bae\u91c7\u7528\u96c6\u4e2d\u5f0f\u8eab\u4efd\u7ba1\u7406\uff08LDAP\/AD\uff09\uff0c\u786e\u4fdd UID\/GID \u4e00\u81f4\u3002<\/li>\n<li>\u4f7f\u7528\u914d\u7f6e\u7ba1\u7406\u5de5\u5177\uff08Ansible\/Chef\/Puppet\uff09\u7edf\u4e00\u6587\u4ef6\u6743\u9650\u3001\u5c5e\u4e3b\u8bbe\u7f6e\u4e0e\u76ee\u5f55\u7ed3\u6784\uff0c\u907f\u514d\u624b\u5de5\u53d8\u66f4\u5e26\u6765\u7684\u4e0d\u4e00\u81f4\u3002<\/li>\n<li>\u542f\u7528\u5e76\u89c4\u8303 ACL \u4f7f\u7528\uff1a\u5728\u786e\u5b9e\u9700\u8981\u7ec6\u7c92\u5ea6\u63a7\u5236\u65f6\u4f7f\u7528 ACL\uff0c\u5e76\u5728\u6587\u6863\u4e2d\u8bb0\u5f55\u6bcf\u4e2a\u989d\u5916\u89c4\u5219\u7684\u7406\u7531\u3002<\/li>\n<li>\u5bf9\u654f\u611f\u76ee\u5f55\u4f7f\u7528\u4e0d\u53ef\u66f4\u6539\u7b56\u7565\uff1a\u901a\u8fc7 immutable \u4f4d\uff08chattr +i\uff09\u6216\u901a\u8fc7\u5bb9\u5668\u9694\u79bb\u5c06\u5e38\u53d8\u76ee\u5f55\u4e0e\u6301\u4e45\u76ee\u5f55\u5206\u79bb\u3002<\/li>\n<li>\u5b9e\u65bd\u53d8\u66f4\u63a7\u5236\u4e0e\u5ba1\u8ba1\uff1a\u6240\u6709\u6743\u9650\u76f8\u5173\u53d8\u66f4\u9700\u5728\u7248\u672c\u63a7\u5236\u6216\u53d8\u66f4\u5355\u4e2d\u8bb0\u5f55\uff0c\u5e76\u542f\u7528\u5ba1\u8ba1\u5de5\u5177\u4ee5\u4fbf\u8ffd\u8e2a\u5f02\u5e38\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u4f18\u52bf\u5bf9\u6bd4\uff1a\u9999\u6e2f\u670d\u52a1\u5668 vs 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