\u4f60\u53ef\u4ee5\u914d\u7f6e SSH \u8bbe\u7f6e\uff0c\u5c06\u8d26\u6237\u9694\u79bb\u5728\u5b89\u5168\u7684 chroot \u76d1\u72f1\u4e2d\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u901a\u8fc7\u5c06\u7528\u6237\u9650\u5236\u5230\u6307\u5b9a\u76ee\u5f55\uff0c\u6765\u963b\u6b62\u5176\u672a\u7ecf\u6388\u6743\u5730\u904d\u5386\u5173\u952e\u7cfb\u7edf\u8def\u5f84\u3002<\/p>\n

\u5728 sshd_config \u4e2d\u5e94\u7528 SSH Chroot \u6307\u4ee4<\/h3>\n

\u5f53\u4f60\u4e3a\u76ee\u6807\u8d26\u6237\u521b\u5efa chroot \u76d1\u72f1\u914d\u7f6e\u65f6\uff0c\u9700\u8981\u7f16\u8f91 \/etc\/ssh\/sshd_config<\/code>\u3002OpenSSH \u4f1a\u6839\u636e\u5355\u4e2a\u8d26\u6237\u6216\u7ec4\u5b9a\u4e49\u6765\u8bc4\u4f30\u53c2\u6570\u3002\u4e0b\u8868\u7a81\u51fa\u5c55\u793a\u4e86\u4e0d\u540c\u5339\u914d\u6761\u4ef6\u5728\u8fd0\u884c\u884c\u4e3a\u4e0a\u7684\u5dee\u5f02\uff1a<\/p>\n

\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n

\u89c2\u5bdf\u9879<\/th>\n	\u4f7f\u7528 Match User \u914d\u5408 ChrootDirectory<\/th>\n	\u989d\u5916\u6dfb\u52a0 Match Group \u6307\u4ee4<\/th>\n<\/tr>\n
\u914d\u7f6e\u91cd\u65b0\u5904\u7406<\/td>\n	\u7528\u6237\u4f1a\u88ab\u6b63\u5e38\u89e3\u6790\uff1b\u8c03\u8bd5\u65e5\u5fd7\u4e2d\u4f1a\u663e\u793a\u6709\u6548\u7528\u6237\u540d\uff0c\u4f8b\u5982 user test matched group list ...<\/code>\u3002<\/td>\n	\u7ec4\u5339\u914d\u4f1a\u5728\u7528\u6237\u540d\u4e3a\u7a7a\u7684\u60c5\u51b5\u4e0b\u5c1d\u8bd5\u6267\u884c\uff0c\u4ece\u800c\u4ea7\u751f Can't match group ... because user does not exist<\/code>\u3002<\/td>\n<\/tr>\n
ChrootDirectory \u884c\u4e3a<\/td>\n	ChrootDirectory<\/code> \u4f1a\u88ab\u53ef\u9760\u5e94\u7528\uff0c\u4f8b\u5982\u5e94\u7528\u5230 C:\\<\/code>\uff0c\u5e76\u4e14 SFTP \u4f1a\u8bdd\u4f1a\u88ab\u6b63\u786e\u5730\u9650\u5236\u5728\u76d1\u72f1\u4e2d\u3002<\/td>\n	\u7531\u4e8e\u5728\u7528\u6237\u88ab\u5b8c\u6574\u91cd\u65b0\u89e3\u6790\u524d\u914d\u7f6e\u91cd\u5904\u7406\u5df2\u5931\u8d25\uff0cChrootDirectory<\/code> \u65e0\u6cd5\u88ab\u7a33\u5b9a\u5e94\u7528\u3002<\/td>\n<\/tr>\n
\u8fde\u63a5\u7ed3\u679c<\/td>\n	SFTP \u4f1a\u8bdd\u6210\u529f\uff1bpwd<\/code> \u548c\u76ee\u5f55\u5217\u8868\u529f\u80fd\u5747\u53ef\u6b63\u5e38\u5de5\u4f5c\u3002<\/td>\n	\u4f1a\u95f4\u6b47\u6027\u51fa\u73b0 Permission denied<\/code> \u6216 client_loop: send disconnect: Connection reset<\/code>\uff1b\u5931\u8d25\u8868\u73b0\u53ef\u80fd\u56e0\u5c1d\u8bd5\u6b21\u6570\u800c\u5f02\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u4f60\u53ef\u4ee5\u5c06\u4ee5\u4e0b\u6307\u4ee4\u8ffd\u52a0\u5230 \/etc\/ssh\/sshd_config<\/code> \u6587\u4ef6\u672b\u5c3e\uff0c\u4ee5\u5f3a\u5236\u5b9e\u65bd\u4f1a\u8bdd\u9694\u79bb\uff1a<\/p>\n Subsystem sftp internal-sftp\r\n\r\nMatch Group sftpgroup\r\n ChrootDirectory \/sftp\/%u\r\n ForceCommand internal-sftp\r\n X11Forwarding no\r\n AllowTcpForwarding no<\/code><\/pre>\n \u8bbe\u7f6e Chroot \u76ee\u5f55\u6240\u6709\u6743<\/h3>\n \u4e25\u683c\u7684\u6240\u6709\u6743\u89c4\u5219\u652f\u914d\u7740 Linux \u4e0a\u7684\u6bcf\u4e00\u4e2a\u9694\u79bb\u73af\u5883\u3002OpenSSH \u4f1a\u5728\u6388\u4e88\u8bbf\u95ee\u6743\u9650\u4e4b\u524d\u9a8c\u8bc1\u6240\u6709\u7236\u7ea7\u76ee\u5f55\uff1a<\/p>\n sshd \u4f1a\u9a8c\u8bc1 chroot \u8def\u5f84\u4e2d\u7684\u6bcf\u4e00\u5c42\u76ee\u5f55\u90fd\u5f52 root \u6240\u6709\uff0c\u5e76\u4e14\u4e0d\u80fd\u88ab\u4efb\u4f55\u5176\u4ed6\u7528\u6237\u6216\u7ec4\u5199\u5165\u3002\u8ba4\u8bc1\u5b8c\u6210\u540e\uff0c\u5b83\u4f1a chroot \u5230\u8be5\u76ee\u5f55\uff0c\u7136\u540e\u518d\u5207\u6362\u5230\u7528\u6237\u7684\u4e3b\u76ee\u5f55\u3002<\/p><\/blockquote>\n \u4f60\u5e94\u6309\u7167\u987a\u5e8f\u6267\u884c\u90e8\u7f72\u6b65\u9aa4\uff0c\u4ee5\u5b89\u5168\u5730\u521b\u5efa\u5e76\u914d\u7f6e SSH \u7528\u6237\u8bbf\u95ee\uff1a<\/p>\n \n \u4f7f\u7528 groupadd sftpgroup<\/code> \u521b\u5efa\u4e00\u4e2a\u4e13\u7528\u7ec4\u3002<\/li>\n \u4f7f\u7528 mkdir \/sftp<\/code> \u521b\u5efa chroot \u6839\u76ee\u5f55\uff0c\u7136\u540e\u901a\u8fc7 chown root:root \/sftp<\/code> \u8bbe\u7f6e\u6240\u6709\u8005\uff0c\u5e76\u901a\u8fc7 chmod 755 \/sftp<\/code> \u8bbe\u7f6e\u6743\u9650\u3002<\/li>\n \u6267\u884c useradd -g sftpgroup -s \/sbin\/nologin sftpuser<\/code> \u521b\u5efa\u4e00\u4e2a\u6ca1\u6709 shell \u8bbf\u95ee\u6743\u9650\u7684\u8d26\u6237\uff0c\u7136\u540e\u4f7f\u7528 passwd sftpuser<\/code> \u8bbe\u7f6e\u5bc6\u7801\u3002<\/li>\n \u5728\u8be5\u9694\u79bb\u73af\u5883\u4e2d\u521b\u5efa\u4e0a\u4f20\u76ee\u5f55\uff0c\u6267\u884c mkdir \/sftp\/sftpuser\/upload<\/code>\uff0c\u7136\u540e\u8bbe\u7f6e\u8bbf\u95ee\u5c5e\u6027\uff1achown root:root \/sftp\/sftpuser<\/code> \u4ee5\u53ca chmod 777 \/sftp\/sftpuser\/upload<\/code>\u3002<\/li>\n \u4f7f\u7528 systemctl restart sshd.service<\/code> \u91cd\u542f\u5b88\u62a4\u8fdb\u7a0b\u3002<\/li>\n<\/ol>\n \u5728\u8bbe\u7f6e\u8fc7\u7a0b\u4e2d\u7ba1\u7406\u8d26\u6237\u65f6\uff0c\u4f60\u5fc5\u987b\u6267\u884c\u7cbe\u786e\u7684\u547d\u4ee4\u5e8f\u5217\uff1a<\/p>\n \n \u5728\u521d\u59cb\u521b\u5efa\u8d26\u6237\u65f6\u8fd0\u884c useradd<\/code>\uff0c\u4ee5\u5206\u914d\u57fa\u7840\u5c5e\u6027\u3002<\/li>\n \u4f7f\u7528 usermod -d \/sftp\/sftpuser\/upload sftpuser<\/code> \u4fee\u6539\u73b0\u6709\u76ee\u5f55\u8def\u5f84\u3002<\/li>\n \u5e94\u7528 usermod -s \/sbin\/nologin sftpuser<\/code> \u6765\u7981\u7528\u4ea4\u4e92\u5f0f shell \u8bbf\u95ee\u3002<\/li>\n \u6267\u884c usermod -aG sftpgroup sftpuser<\/code> \u5c06\u73b0\u6709\u7528\u6237\u52a0\u5165\u8be5\u7ec4\u3002<\/li>\n \u5fc5\u987b\u4fdd\u6301\u7236\u7ea7\u76ee\u5f55\u5f52 root \u6240\u6709\uff0c\u5426\u5219 chroot \u8fc7\u7a0b\u5c06\u5f7b\u5e95\u5931\u8d25\u3002<\/li>\n<\/ul>\n \u8fd9\u79cd\u5e38\u89c1\u7684 chroot jail \u914d\u7f6e\u53ef\u4ee5\u5c06\u6587\u4ef6\u4f20\u8f93\u9650\u5236\u5728\u76d1\u72f1\u73af\u5883\u5185\uff0c\u540c\u65f6\u963b\u6b62\u6587\u4ef6\u7cfb\u7edf\u5bfc\u822a\u8d8a\u754c\u3002\u5982\u679c\u4f60\u4f7f\u7528\u5bc6\u94a5\u8ba4\u8bc1\uff0c\u8bf7\u8bbe\u7f6e AuthorizedKeysFile \/home\/%u\/.ssh\/authorized_keys<\/code>\uff0c\u56e0\u4e3a\u5bc6\u94a5\u9a8c\u8bc1\u53d1\u751f\u5728\u8fdb\u5165 chroot \u73af\u5883\u4e4b\u524d\u3002\u5728\u76d1\u72f1\u4e2d\u63d0\u4f9b\u4e00\u4e2a\u53ef\u5199\u76ee\u5f55\uff0c\u53ef\u4ee5\u5728\u4fdd\u6301\u76d1\u72f1\u5b89\u5168\u7684\u540c\u65f6\u5141\u8bb8\u6587\u4ef6\u4e0a\u4f20\u4e0e\u4f20\u8f93\u3002<\/p>\n \u901a\u8fc7 POSIX \u6743\u9650\u9650\u5236\u7528\u6237\u8bbf\u95ee<\/strong><\/h2>\n \u9ed8\u8ba4\u7684 Linux \u914d\u7f6e\u901a\u5e38\u4f1a\u5141\u8bb8\u975e root \u8d26\u6237\u67e5\u770b\u5171\u4eab\u7cfb\u7edf\u8def\u5f84\u4e0b\u7684\u76ee\u5f55\u540d\u79f0\u3002\u975e\u7279\u6743\u8d26\u6237\u53ef\u80fd\u5728\u672a\u7ecf\u6388\u6743\u7684\u60c5\u51b5\u4e0b\u5217\u51fa\u7236\u7ea7\u8def\u5f84\u4e2d\u7684\u5185\u5bb9\u3002\u4f60\u5fc5\u987b\u8c03\u6574\u7cfb\u7edf\u914d\u7f6e\u8bbe\u7f6e\uff0c\u624d\u80fd\u5f7b\u5e95\u9650\u5236\u7528\u6237\u8bbf\u95ee\u3002\u9650\u5236\u7528\u6237\u8bbf\u95ee\uff0c\u662f\u4fdd\u62a4\u673a\u5bc6\u6570\u636e\u5b89\u5168\u7684\u91cd\u8981\u624b\u6bb5\u3002<\/p>\n \u7cfb\u7edf\u7ba1\u7406\u5458\u4f1a\u4fee\u6539 POSIX \u89c4\u5219\uff0c\u4ee5\u4fdd\u62a4\u4e3b\u8981\u4e3b\u76ee\u5f55\u8def\u5f84\u7684\u5b89\u5168\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u4e25\u683c\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u9632\u6b62\u7528\u6237\u8d8a\u6743\u6d4f\u89c8\u5176\u4ed6\u7528\u6237\u76ee\u5f55\u3002<\/p>\n \u52a0\u56fa\u7236\u7ea7 Home \u76ee\u5f55\u8bbf\u95ee\u63a7\u5236<\/h3>\n \u6807\u51c6 Linux \u5b89\u88c5\u901a\u5e38\u5141\u8bb8\u8d26\u6237\u67e5\u770b\u5171\u4eab\u7236\u7ea7\u8def\u5f84\u4e0b\u7684\u76ee\u5f55\u7ed3\u6784\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u4e3b\u7cfb\u7edf\u7ea7\u522b\u7684\u76ee\u5f55\u8bbf\u95ee\u63a7\u5236\uff0c\u6765\u4fdd\u62a4\u8fd9\u4e9b\u4f4d\u7f6e\u3002<\/p>\n \u7ba1\u7406\u5458\u4f1a\u4f7f\u7528\u660e\u786e\u7684\u547d\u4ee4\u9009\u9879\u6765\u63a7\u5236\u76ee\u5f55\u8fdb\u5165\u4e0e\u6587\u4ef6\u5217\u8868\u64cd\u4f5c\uff1a<\/p>\n \n chmod 750 \/home<\/code>\uff1a\u6388\u4e88\u6240\u6709\u8005\u5b8c\u6574\u63a7\u5236\u6743\u9650\uff0c\u6388\u4e88\u7ec4\u6210\u5458\u8bfb\u53d6\u548c\u6267\u884c\u6743\u9650\uff0c\u800c\u5bf9\u5176\u4ed6\u8d26\u6237\u4e0d\u6388\u4e88\u4efb\u4f55\u6743\u9650\u3002<\/li>\n chmod 711 \/home<\/code>\uff1a\u4e3a\u6240\u6709\u8d26\u6237\u6388\u4e88\u6267\u884c\u6743\u9650\uff0c\u4f7f\u7528\u6237\u53ef\u4ee5\u7a7f\u8fc7 \/home<\/code> \u8fdb\u884c\u8def\u5f84\u8bbf\u95ee\uff0c\u4f46\u65e0\u6cd5\u67e5\u770b\u5176\u76ee\u5f55\u5217\u8868\u5185\u5bb9\u3002<\/li>\n<\/ul>\n \u8fd9\u4e9b\u8bbe\u7f6e\u80fd\u591f\u963b\u6b62\u975e\u7279\u6743\u8d26\u6237\u679a\u4e3e\u4e3b\u673a\u7684\u76ee\u5f55\u7ed3\u6784\uff0c\u540c\u65f6\u4fdd\u7559\u5408\u6cd5\u8d26\u6237\u6240\u9700\u7684\u6b63\u5e38\u8def\u5f84\u904d\u5386\u80fd\u529b\u3002<\/p>\n \u4fdd\u62a4\u7528\u6237\u4e3b\u76ee\u5f55\u6743\u9650<\/h3>\n \u5728\u4fdd\u62a4\u4e3b\u7236\u76ee\u5f55\u4e4b\u540e\uff0c\u4f60\u8fd8\u5fc5\u987b\u9501\u5b9a\u5355\u4e2a\u7528\u6237\u76ee\u5f55\u7684\u6743\u9650\u8bbe\u7f6e\u3002\u5bf9\u7528\u6237\u4e3b\u76ee\u5f55\u8bbe\u7f6e chmod 700<\/code>\uff0c\u610f\u5473\u7740\u53ea\u7ed9\u76ee\u5f55\u6240\u6709\u8005\u6388\u4e88\u8bfb\u53d6\u3001\u5199\u5165\u548c\u6267\u884c\u6743\u9650\u3002\u8be5\u6a21\u5f0f\u4f1a\u963b\u6b62\u7ec4\u6210\u5458\u548c\u5176\u4ed6\u5916\u90e8\u8d26\u6237\u67e5\u770b\u79c1\u4eba\u6587\u4ef6\u3002<\/p>\n OpenSSH \u4f1a\u5728\u5b9e\u9645\u8ba4\u8bc1\u8fc7\u7a0b\u4e2d\u68c0\u67e5\u6587\u4ef6\u7cfb\u7edf\u5b89\u5168\u6027\u3002\u5982\u679c\u76ee\u6807\u8d26\u6237\u76ee\u5f55\u6743\u9650\u8fc7\u4e8e\u5bbd\u677e\uff0c\u8fdc\u7a0b SSH \u670d\u52a1\u53ef\u80fd\u4f1a\u62d2\u7edd\u8fde\u63a5\u3002<\/p>\n \n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n \u6a21\u5f0f<\/th>\n \u6240\u6709\u8005<\/th>\n \u7ec4<\/th>\n \u5176\u4ed6\u4eba<\/th>\n \u5b89\u5168\u542b\u4e49<\/th>\n<\/tr>\n 700<\/td>\n \u8bfb\u53d6\u3001\u5199\u5165\u3001\u6267\u884c<\/td>\n \u65e0<\/td>\n \u65e0<\/td>\n \u5c06\u8bbf\u95ee\u6743\u9650\u5b8c\u5168\u9501\u5b9a\u7ed9\u76ee\u6807\u7528\u6237\u672c\u4eba\u3002<\/td>\n<\/tr>\n 755<\/td>\n \u8bfb\u53d6\u3001\u5199\u5165\u3001\u6267\u884c<\/td>\n \u8bfb\u53d6\u3001\u6267\u884c<\/td>\n \u8bfb\u53d6\u3001\u6267\u884c<\/td>\n \u5141\u8bb8\u5916\u90e8\u8d26\u6237\u8bfb\u53d6\u8be5\u4e3b\u76ee\u5f55\u4e2d\u7684\u6587\u4ef6\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u4f60\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u5bf9\u6bcf\u4e2a\u7528\u6237\u7684\u4e3b\u76ee\u5f55\u5e94\u7528 700 \u6a21\u5f0f\uff0c\u5728\u6574\u53f0\u4e3b\u673a\u4e0a\u7ef4\u6301\u5f3a\u6709\u529b\u7684\u8d26\u6237\u9694\u79bb\u3002<\/p>\n \u5b9e\u65bd\u53d7\u9650 Shell \u4e0e\u547d\u4ee4\u63a7\u5236<\/strong><\/h2>\n \u9664\u4e86\u57fa\u7840\u7cfb\u7edf\u914d\u7f6e\u4e4b\u5916\uff0c\u4f60\u8fd8\u53ef\u4ee5\u90e8\u7f72\u53d7\u9650 shell \u6765\u8fdb\u4e00\u6b65\u9650\u5236\u7528\u6237\u3002\u53d7\u9650 shell \u80fd\u9501\u5b9a\u6267\u884c\u6743\u9650\uff0c\u5e76\u963b\u6b62\u8d26\u6237\u79bb\u5f00\u6307\u5b9a\u4f4d\u7f6e\u3002<\/p>\n \u914d\u7f6e Restricted Bash Shell \u73af\u5883<\/h3>\n \u7cfb\u7edf\u7ba1\u7406\u5458\u4f1a\u4f7f\u7528\u53d7\u9650 shell \u6765\u963b\u6b62 SSH \u4f1a\u8bdd\u4e2d\u672a\u7ecf\u6388\u6743\u7684\u547d\u4ee4\u6267\u884c\u3002\u4f60\u9996\u5148\u9700\u8981\u786e\u8ba4\u7cfb\u7edf\u4e2d\u5b58\u5728 rbash<\/code>\u3002\u5982\u679c\u7cfb\u7edf\u7f3a\u5c11\u9ed8\u8ba4\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u4f60\u53ef\u4ee5\u4ece \/usr\/bin\/bash<\/code> \u521b\u5efa\u4e00\u4e2a\u6307\u5411 \/usr\/bin\/rbash<\/code> \u7684\u7b26\u53f7\u94fe\u63a5\u3002<\/p>\n \u63a5\u4e0b\u6765\uff0c\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u8d26\u6237\uff0c\u6216\u66f4\u65b0\u73b0\u6709\u7528\u6237\u914d\u7f6e\u3002\u4f60\u53ef\u5728\u521b\u5efa\u8d26\u6237\u65f6\u4f7f\u7528 useradd -s \/usr\/bin\/rbash newuser<\/code> \u6307\u5b9a rbash<\/code> \u4f5c\u4e3a\u767b\u5f55 shell\u3002\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528 usermod -s \/usr\/bin\/rbash targetuser<\/code> \u6765\u4fee\u6539\u73b0\u6709\u76ee\u6807\u8d26\u6237\u3002\u65e0\u8bba\u4f55\u65f6\u9700\u8981\u66f4\u65b0 shell \u5206\u914d\uff0c\u4f60\u90fd\u53ef\u4ee5\u518d\u6b21\u6267\u884c usermod<\/code>\u3002\u5982\u679c\u4f60\u5728\u8fc1\u79fb\u8d26\u6237\uff0c\u4e5f\u53ef\u4ee5\u8c03\u7528 usermod<\/code> \u6765\u8c03\u6574\u914d\u7f6e\u6587\u4ef6\u8bbe\u7f6e\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u4f1a\u901a\u8fc7\u8fd0\u884c usermod<\/code> \u6765\u7ef4\u62a4\u6240\u6709\u53d7\u7ba1\u8d26\u6237\u7684 shell \u8fb9\u754c\u3002<\/p>\n \u5728\u81ea\u5b9a\u4e49\u547d\u4ee4\u8def\u5f84\u4e2d\u9650\u5236\u53ef\u6267\u884c\u6587\u4ef6<\/h3>\n \u4f60\u9700\u8981\u5b9e\u65bd\u8def\u5f84\u9694\u79bb\uff0c\u4ee5\u9632\u6b62\u6267\u884c\u672a\u7ecf\u6388\u6743\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002\u4f60\u53ef\u4ee5\u5728\u7528\u6237\u4e3b\u76ee\u5f55\u4e2d\u521b\u5efa\u4e00\u4e2a\u7531 root \u62e5\u6709\u7684\u76ee\u5f55\uff0c\u4f8b\u5982 \/home\/targetuser\/.bin<\/code>\uff0c\u4f5c\u4e3a\u5b89\u5168\u547d\u4ee4\u7684\u4e13\u7528\u76ee\u5f55\u3002\u7136\u540e\u53ea\u5c06\u88ab\u6279\u51c6\u7684\u547d\u4ee4\u94fe\u63a5\u5230\u8be5\u76ee\u5f55\u4e2d\uff0c\u4f8b\u5982 ls<\/code>\u3001su<\/code> \u548c clear<\/code>\u3002<\/p>\n \u5728\u7528\u6237\u914d\u7f6e\u6587\u4ef6 .bashrc<\/code> \u4e2d\uff0c\u4f60\u9700\u8981\u5b9a\u4e49 PATH=$HOME\/.bin<\/code> \u5e76\u8bbe\u7f6e umask 077<\/code>\u3002\u4f60\u8fd8\u5e94\u5c06\u6587\u4ef6\u6240\u6709\u6743\u6539\u4e3a root:targetuser<\/code>\uff0c\u8fd9\u6837\u8d26\u6237\u672c\u4eba\u5c31\u65e0\u6cd5\u4fee\u6539\u542f\u52a8\u811a\u672c\u3002<\/p>\n \u4e0b\u8868\u603b\u7ed3\u4e86\u53d7\u9650 shell \u5185\u5efa\u5f3a\u5236\u6267\u884c\u7684\u5b89\u5168\u4fdd\u62a4\u673a\u5236\uff1a<\/p>\n \n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n rbash \u9650\u5236<\/th>\n \u5b83\u6240\u963b\u6b62\u7684\u884c\u4e3a<\/th>\n \u5b9e\u9645\u8868\u73b0\u8bc1\u636e<\/th>\n<\/tr>\n cd<\/code> \u88ab\u7981\u7528<\/td>\n \u66f4\u6539\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55<\/td>\n cd \/tmp<\/code> \u4f1a\u56e0 \u201crestricted\u201d \u9519\u8bef\u800c\u5931\u8d25<\/td>\n<\/tr>\n exec<\/code>\u3001set<\/code>\u3001unset<\/code> \u88ab\u963b\u6b62<\/td>\n \u4fee\u6539 shell \u73af\u5883\u53ca\u542f\u52a8\u65b0 shell \u4f1a\u8bdd<\/td>\n exec bash<\/code> \u4f1a\u56e0 \u201crestricted\u201d \u9519\u8bef\u800c\u5931\u8d25<\/td>\n<\/tr>\n \u91cd\u5b9a\u5411\u88ab\u7981\u7528<\/td>\n \u901a\u8fc7 ><\/code>\u3001<<\/code>\u3001>><\/code> \u5199\u5165\u6216\u8bfb\u53d6\u6587\u4ef6<\/td>\n echo \"Test\" > test.txt<\/code> \u4f1a\u88ab\u62d2\u7edd<\/td>\n<\/tr>\n \u5305\u542b \/<\/code> \u7684\u8def\u5f84\u540d\u88ab\u62d2\u7edd<\/td>\n \u901a\u8fc7\u7edd\u5bf9\/\u76f8\u5bf9\u8def\u5f84\u5728 PATH \u4e4b\u5916\u542f\u52a8\u547d\u4ee4<\/td>\n \u5c1d\u8bd5\u6267\u884c \/bin\/ls<\/code> \u4f1a\u56e0 \u201crestricted\u201d \u9519\u8bef\u88ab\u62d2\u7edd<\/td>\n<\/tr>\n PATH \u88ab\u8bbe\u7f6e\u4e3a\u7279\u5b9a\u7528\u6237\u7684 bin<\/code><\/td>\n \u6267\u884c\u5141\u8bb8\u5217\u8868\u4e4b\u5916\u7684\u4efb\u610f\u547d\u4ee4<\/td>\n \u53ea\u80fd\u8fd0\u884c\u50cf hello.sh<\/code> \u8fd9\u6837\u7684\u767d\u540d\u5355\u811a\u672c<\/td>\n<\/tr>\n SSH \u4e00\u6b21\u6027\u547d\u4ee4<\/td>\n \u4e0d\u53d7 rbash \u4ea4\u4e92\u6a21\u5f0f\u9650\u5236\u7684\u963b\u6b62<\/td>\n \u6ce8\u91ca\u6307\u51fa ssh some_host any_command<\/code> \u4ecd\u7136\u53ef\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u4f7f\u7528\u53d7\u9650 shell \u53ef\u4ee5\u963b\u6b62\u7528\u6237\u542f\u52a8\u672a\u6279\u51c6\u7a0b\u5e8f\u3001\u6267\u884c\u76ee\u5f55\u5207\u6362\uff0c\u6216\u4fee\u6539\u5173\u952e\u73af\u5883\u53d8\u91cf\u3002<\/p>\n \u9a8c\u8bc1\u7528\u6237\u9694\u79bb\u4e0e\u8bbf\u95ee\u9650\u5236<\/strong><\/h2>\n \u6d4b\u8bd5 SFTP \u4e0e Shell \u8fb9\u754c\u63a7\u5236<\/h3>\n \u5728\u66f4\u65b0\u670d\u52a1\u5668\u914d\u7f6e\u540e\uff0c\u4f60\u9700\u8981\u901a\u8fc7\u5b9e\u9645\u7684 SFTP \u6d4b\u8bd5\u6765\u9a8c\u8bc1 chroot jail \u53c2\u6570\u662f\u5426\u751f\u6548\u3002\u8be5\u6d4b\u8bd5\u80fd\u591f\u786e\u8ba4\u8fdc\u7a0b\u8d26\u6237\u662f\u5426\u88ab\u9501\u5b9a\u5728\u6307\u5b9a\u8fb9\u754c\u4f4d\u7f6e\u5185\u3002\u4f60\u53ef\u4ee5\u6253\u5f00\u7ec8\u7aef\uff0c\u901a\u8fc7 SSH \u6267\u884c sftp user@host<\/code> \u6765\u6d4b\u8bd5\u6587\u4ef6\u4f20\u8f93\u7ea6\u675f\u3002\u670d\u52a1\u5668\u4f1a\u5728\u767b\u5f55\u540e\u7acb\u5373\u5b9e\u65bd\u76ee\u5f55\u9650\u5236\u3002\u5728 \/etc\/ssh\/sshd_config<\/code> \u4e2d\u8bbe\u7f6e ForceCommand internal-sftp<\/code>\uff0c\u53ef\u4ee5\u5c06\u4f1a\u8bdd\u80fd\u529b\u5b8c\u5168\u9650\u5236\u4e3a\u6587\u4ef6\u7ba1\u7406\u3002\u4f60\u53ef\u4ee5\u501f\u52a9\u8fd9\u4e9b\u4e25\u683c\u89c4\u5219\uff0c\u5c06\u7528\u6237\u8bbf\u95ee\u9650\u5236\u5728\u6307\u5b9a\u7cfb\u7edf\u8303\u56f4\u4e4b\u5185\u3002<\/p>\n \u63a5\u4e0b\u6765\uff0c\u4f60\u8fd8\u8981\u8bc4\u4f30\u4ea4\u4e92\u5f0f\u4f1a\u8bdd\u9650\u5236\u3002\u901a\u8fc7\u6267\u884c ssh user@host<\/code> \u542f\u52a8\u4e00\u4e2a\u4f1a\u8bdd\u6765\u6d4b\u8bd5\u7cfb\u7edf\u5b89\u5168\u6027\u3002\u53d7\u9650 shell \u4f1a\u963b\u6b62\u6539\u53d8\u5de5\u4f5c\u4f4d\u7f6e\u7684\u547d\u4ee4\u3002\u50cf pwd<\/code>\u3001echo<\/code> \u548c history<\/code> \u8fd9\u6837\u7684 shell \u5185\u5efa\u547d\u4ee4\u4ecd\u80fd\u6210\u529f\u8fd0\u884c\uff0c\u56e0\u4e3a\u5b83\u4eec\u7531 bash \u5728\u5185\u90e8\u5904\u7406\u3002\u7136\u800c\uff0c\u5f53\u4f60\u9501\u5b9a\u7528\u6237\u4e3b\u76ee\u5f55\u8def\u5f84\u540e\uff0c\u50cf ls<\/code>\u3001date<\/code> \u6216 uname<\/code> \u8fd9\u6837\u7684\u5916\u90e8\u4e8c\u8fdb\u5236\u547d\u4ee4\u5c06\u5f7b\u5e95\u5931\u8d25\u3002\u4e00\u4e2a\u914d\u7f6e\u6b63\u786e\u7684\u53d7\u9650 shell \u4f1a\u62d2\u7edd\u6267\u884c\u8d8a\u754c\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u4e5f\u4f1a\u963b\u6b62\u7528\u6237\u66f4\u6539\u73af\u5883\u8def\u5f84\u3002\u6b63\u786e\u7684 chroot jail \u8bbe\u7f6e\u5219\u80fd\u6301\u7eed\u4fdd\u6301\u8d26\u6237\u9694\u79bb\u3002<\/p>\n \u9a8c\u8bc1 SSH \u7528\u6237\u8bbf\u95ee\u4e0e\u76ee\u5f55\u904d\u5386\u9650\u5236<\/h3>\n \u4f60\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u6d4b\u8bd5\u76ee\u5f55\u5bfc\u822a\u63a7\u5236\u6765\u9a8c\u8bc1 SSH \u7528\u6237\u8bbf\u95ee\u9650\u5236\u3002\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u68c0\u67e5\u4f60\u7684 chroot jail \u5b9e\u73b0\uff1a<\/p>\n \n \u4ee5\u53d7\u9650\u7528\u6237\u8eab\u4efd\u767b\u5f55\uff1assh jailuser@localhost<\/code>\u3002<\/li>\n \u5728\u8fdc\u7a0b shell \u4e2d\u5207\u6362\u5230\u8868\u9762\u4e0a\u7684\u6839\u76ee\u5f55\uff1acd \/<\/code>\u3002<\/li>\n \u4f7f\u7528 ls<\/code> \u67e5\u770b\u76ee\u5f55\uff1b\u5e94\u5f53\u53ea\u80fd\u770b\u5230\u76d1\u72f1\u5185\u90e8\u5185\u5bb9\uff0c\u800c\u4e0d\u662f\u771f\u5b9e\u6587\u4ef6\u7cfb\u7edf\u3002<\/li>\n \u5c1d\u8bd5\u901a\u8fc7 cd ..<\/code> \u5411\u4e0a\u79fb\u52a8\uff1b\u4f1a\u8bdd\u5e94\u4ecd\u505c\u7559\u5728 \/<\/code>\uff0c\u8fd9\u8bc1\u660e\u76ee\u5f55\u904d\u5386\u5df2\u88ab\u963b\u6b62\u3002<\/li>\n \u5728\u5ba1\u8ba1\u65e5\u5fd7\u4e2d\u9a8c\u8bc1 chroot \u662f\u5426\u5df2\u6fc0\u6d3b\uff1asudo grep -i chroot \/var\/log\/auth.log<\/code>\u3002<\/li>\n<\/ol>\n \u8fd9\u5957\u7ed3\u6784\u5316\u6d4b\u8bd5\u6d41\u7a0b\u80fd\u591f\u786e\u8ba4\u7cfb\u7edf\u8fb9\u754c\u662f\u5426\u6709\u6548\u5730\u9650\u5236\u4e86\u8fdc\u7a0b\u4f1a\u8bdd\u4e2d\u7684\u7528\u6237\u8bbf\u95ee\u3002<\/p>\n \u6d4b\u8bd5\u53ef\u4ee5\u786e\u4fdd\u4f60\u7684 chroot jail \u914d\u7f6e\u771f\u6b63\u9694\u79bb\u8d26\u6237\uff0c\u800c\u4e0d\u4f1a\u51fa\u73b0\u610f\u5916\u7684\u8bbf\u95ee\u6cc4\u6f0f\u3002<\/p>\n \n <\/div>\n<\/div>\n \u4f60\u53ef\u4ee5\u901a\u8fc7\u6267\u884c\u5b9e\u9645\u6d4b\u8bd5\u547d\u4ee4\u6765\u9a8c\u8bc1\u9694\u79bb\u73af\u5883\u3002\u8fd0\u884c ssh user@host<\/code> \u5efa\u7acb\u65b0\u7684\u8fdc\u7a0b\u4f1a\u8bdd\u3002\u968f\u540e\u6267\u884c pwd<\/code>\uff0c\u5e76\u5c1d\u8bd5\u4f7f\u7528 cd ..<\/code> \u8fdb\u884c\u76ee\u5f55\u5bfc\u822a\u3002\u6d3b\u52a8\u4f1a\u8bdd\u5e94\u5c06\u4f60\u7684\u8def\u5f84\u9501\u5b9a\u5728\u76ee\u6807\u76ee\u5f55\u7ed3\u6784\u5185\u90e8\u3002\u4f60\u5fc5\u987b\u5b9a\u671f\u5bf9 Linux \u4e3b\u673a\u4e0a\u7684\u76ee\u5f55\u6743\u9650\u8fdb\u884c\u5b89\u5168\u5ba1\u8ba1\uff0c\u4ee5\u9632\u6b62\u6743\u9650\u56de\u9000\u5e76\u6301\u7eed\u7ef4\u62a4\u8bbf\u95ee\u63a7\u5236\u5b89\u5168\u3002<\/p>\n \u4f60\u8fd8\u5e94\u76d1\u63a7\u7cfb\u7edf\u65e5\u5fd7\uff0c\u4ee5\u5c3d\u65e9\u53d1\u73b0\u672a\u6388\u6743\u8bbf\u95ee\u5c1d\u8bd5\u3002\u68c0\u67e5 \/var\/log\/auth.log<\/code>\uff0c\u6216\u5728\u670d\u52a1\u5668\u4e0a\u8fd0\u884c journalctl -u ssh<\/code>\u3002\u8fd9\u4e9b\u7cfb\u7edf\u65e5\u5fd7\u4f1a\u663e\u793a\u767b\u5f55\u8ba4\u8bc1\u8be6\u60c5\uff0c\u5e76\u7acb\u5373\u8bb0\u5f55\u5931\u8d25\u7684\u76ee\u5f55\u904d\u5386\u4e8b\u4ef6\u3002\u6301\u7eed\u68c0\u67e5\u65e5\u5fd7\uff0c\u80fd\u591f\u957f\u671f\u7ef4\u6301\u670d\u52a1\u5668\u73af\u5883\u4e2d\u7684\u8d26\u6237\u8fb9\u754c\u63a7\u5236\u6548\u679c\u3002<\/p>\n \u5e38\u89c1\u95ee\u9898<\/strong><\/h2>\n \u4e3a\u4ec0\u4e48\u5728 chroot jail \u4e0a\u8bbe\u7f6e\u9519\u8bef\u6743\u9650\u4f1a\u5bfc\u81f4 SSH \u5931\u8d25\uff1f<\/h3>\n OpenSSH \u4f1a\u5f3a\u5236\u6267\u884c\u4e25\u683c\u7684\u5b89\u5168\u6807\u51c6\u3002\u5728\u542f\u52a8 chroot jail \u4e4b\u524d\uff0c\u8def\u5f84\u4e2d\u7684\u6bcf\u4e00\u5c42\u7236\u76ee\u5f55\u90fd\u5fc5\u987b\u5f52 root \u6240\u6709\u3002\u7ec4\u5199\u6743\u9650\u4f1a\u7834\u574f\u8fd9\u4e9b\u5b89\u5168\u68c0\u67e5\u3002\u56e0\u6b64\uff0c\u4f60\u7684\u8fde\u63a5\u4f1a\u5931\u8d25\uff0c\u6216\u8005\u73af\u5883\u521d\u59cb\u5316\u4f1a\u88ab\u8df3\u8fc7\u3002<\/p>\n \u5982\u4f55\u5728\u4e0d\u63d0\u4f9b shell \u8bbf\u95ee\u7684\u60c5\u51b5\u4e0b\u5c06\u8d26\u6237\u9650\u5236\u5728 jail \u4e2d\uff1f<\/h3>\n \u4f60\u53ef\u4ee5\u5c06\u8d26\u6237\u7684 shell \u8bbe\u7f6e\u4e3a \/sbin\/nologin<\/code>\u3002\u7136\u540e\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u6307\u5b9a ForceCommand internal-sftp<\/code>\u3002\u8fd9\u4e00\u8bbe\u7f6e\u4f1a\u5c06\u8fdc\u7a0b\u6587\u4ef6\u4f20\u8f93\u9650\u5236\u5728\u6307\u5b9a jail \u5185\u90e8\u3002<\/p>\n \u8d26\u6237\u80fd\u5426\u5728 Linux \u73af\u5883\u4e2d\u9003\u79bb\u5176\u4e3b\u76ee\u5f55\uff1f<\/h3>\n \u4e0d\u80fd\uff0c\u53d7\u9650 shell \u4f1a\u963b\u6b62\u50cf cd<\/code> \u8fd9\u6837\u7684\u5bfc\u822a\u5185\u5efa\u547d\u4ee4\u3002\u7cfb\u7edf\u4f1a\u62d2\u7edd\u8def\u5f84\u4fee\u6539\u4ee5\u53ca\u5141\u8bb8\u8def\u5f84\u4e4b\u5916\u7684\u547d\u4ee4\u6267\u884c\u3002\u7528\u6237\u65e0\u6cd5\u9003\u79bb\u5176\u76ee\u6807\u76ee\u5f55\uff0c\u4e5f\u4e0d\u80fd\u4fee\u6539\u7cfb\u7edf\u53d8\u91cf\u3002<\/p>\n \u54ea\u4e9b\u6743\u9650\u8bbe\u7f6e\u53ef\u4ee5\u963b\u6b62\u7528\u6237\u67e5\u770b\u5176\u4ed6\u4eba\u7684\u4e3b\u76ee\u5f55\uff1f<\/h3>\n \u4f60\u53ef\u4ee5\u5bf9\u6bcf\u4e2a\u4e2a\u4eba\u76ee\u5f55\u5e94\u7528 chmod 700<\/code>\u3002\u8be5\u547d\u4ee4\u4ec5\u5411\u76ee\u5f55\u6240\u6709\u8005\u6388\u4e88\u5b8c\u6574\u8bbf\u95ee\u6743\u9650\u3002\u6b64\u5916\uff0c\u4f60\u8fd8\u53ef\u4ee5\u5bf9 \/home<\/code> \u8bbe\u7f6e chmod 750<\/code>\uff0c\u4ee5\u963b\u6b62\u975e\u7279\u6743\u8d26\u6237\u8bfb\u53d6\u7236\u7ea7\u8def\u5f84\u5185\u5bb9\u3002<\/p>\n \u5982\u4f55\u786e\u8ba4 chroot \u5df2\u9694\u79bb SSH \u4f1a\u8bdd\uff1f<\/h3>\n \u4f60\u53ef\u4ee5\u901a\u8fc7 SSH \u5efa\u7acb\u4e00\u4e2a\u4f1a\u8bdd\u6765\u6d4b\u8bd5\u8fb9\u754c\u9650\u5236\u3002\u6267\u884c cd ..<\/code> \u68c0\u67e5\u76ee\u5f55\u904d\u5386\u662f\u5426\u88ab\u963b\u6b62\u3002\u6d3b\u52a8\u4f1a\u8bdd\u4f1a\u5c06\u4f60\u7684\u8def\u5f84\u9501\u5b9a\u5728\u7b2c\u4e8c\u5c42 jail \u5185\u90e8\uff0c\u540c\u65f6\u7cfb\u7edf\u65e5\u5fd7\u4f1a\u786e\u8ba4 chroot \u5df2\u6b63\u786e\u6fc0\u6d3b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" \u4f60\u53ef\u4ee5\u901a\u8fc7\u7ed3\u5408\u6587\u4ef6\u7cfb\u7edf\u89c4\u5219\u4e0e\u4e25\u683c\u7684\u8d26\u6237\u9694\u79bb\u673a\u5236\u6765\u52a0\u56fa Linux \u73af\u5883\u7684\u5b89\u5168\u6027\u3002\u4f60\u53ef\u4ee5\u914d\u7f6e SSH \u7528\u6237\u8bbf\u95ee\u7b56\u7565\uff0c\u5c06\u7528\u6237\u9650\u5236\u5728\u5355\u4e00\u4e3b\u76ee\u5f55\u5185\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u901a\u5e38\u4f1a\u5b9e\u65bd chroot \u76d1\u72f1\uff0c\u4ee5\u963b\u6b62\u7528\u6237\u6a2a\u5411\u904d\u5386\u670d\u52a1\u5668\u4e0a\u7684\u654f\u611f\u76ee\u5f55\u4e0e\u7cfb\u7edf\u8def\u5f84\u3002 \u4f60\u8fd8\u5fc5\u987b\u5bf9\u7236\u7ea7\u76ee\u5f55\u5b9e\u65bd\u4e25\u683c\u7684 POSIX \u6743\u9650\u63a7\u5236\uff0c\u4ee5\u9632\u6b62\u672a\u7ecf\u6388\u6743\u7684\u6587\u4ef6\u6d4f\u89c8\u3002\u8981\u5b9e\u73b0\u6709\u6548\u7684\u76ee\u5f55\u9694\u79bb\uff0c\u5728\u7f16\u8f91\u914d\u7f6e\u6587\u4ef6\u4e4b\u524d\u9700\u8981\u6ee1\u8db3\u4e09\u4e2a\u660e\u786e\u524d\u63d0\u6761\u4ef6\uff1a\u4f60\u9700\u8981\u62e5\u6709\u4e3b\u673a\u670d\u52a1\u5668\u7684 root \u6743\u9650\u3001\u7cfb\u7edf\u4e2d\u6b63\u5728\u8fd0\u884c\u7684 OpenSSH \u5b88\u62a4\u8fdb\u7a0b\uff0c\u4ee5\u53ca\u4e00\u4e2a\u7528\u4e8e\u6d4b\u8bd5\u7684\u6807\u51c6\u8d26\u6237\u3002\u8fd9\u4e9b\u57fa\u7840\u7ba1\u7406\u6761\u4ef6\u80fd\u591f\u5e2e\u52a9\u4f60\u5b89\u5168\u5730\u5b8c\u6210\u5b89\u5168\u914d\u7f6e\u90e8\u7f72\uff0c\u907f\u514d\u628a\u81ea\u5df1\u9501\u5728\u8fdc\u7a0b\u7cfb\u7edf\u4e4b\u5916\u3002 \u914d\u7f6e SSH Chroot Jail \u73af\u5883 \u4f60\u53ef\u4ee5\u914d\u7f6e SSH \u8bbe\u7f6e\uff0c\u5c06\u8d26\u6237\u9694\u79bb\u5728\u5b89\u5168\u7684 chroot \u76d1\u72f1\u4e2d\u3002\u7cfb\u7edf\u7ba1\u7406\u5458\u901a\u8fc7\u5c06\u7528\u6237\u9650\u5236\u5230\u6307\u5b9a\u76ee\u5f55\uff0c\u6765\u963b\u6b62\u5176\u672a\u7ecf\u6388\u6743\u5730\u904d\u5386\u5173\u952e\u7cfb\u7edf\u8def\u5f84\u3002 \u5728 sshd_config \u4e2d\u5e94\u7528 SSH Chroot \u6307\u4ee4 \u5f53\u4f60\u4e3a\u76ee\u6807\u8d26\u6237\u521b\u5efa chroot \u76d1\u72f1\u914d\u7f6e\u65f6\uff0c\u9700\u8981\u7f16\u8f91 \/etc\/ssh\/sshd_config\u3002OpenSSH \u4f1a\u6839\u636e\u5355\u4e2a\u8d26\u6237\u6216\u7ec4\u5b9a\u4e49\u6765\u8bc4\u4f30\u53c2\u6570\u3002\u4e0b\u8868\u7a81\u51fa\u5c55\u793a\u4e86\u4e0d\u540c\u5339\u914d\u6761\u4ef6\u5728\u8fd0\u884c\u884c\u4e3a\u4e0a\u7684\u5dee\u5f02\uff1a \u89c2\u5bdf\u9879 \u4f7f\u7528 Match User \u914d\u5408 ChrootDirectory \u989d\u5916\u6dfb\u52a0 Match Group \u6307\u4ee4 \u914d\u7f6e\u91cd\u65b0\u5904\u7406 \u7528\u6237\u4f1a\u88ab\u6b63\u5e38\u89e3\u6790\uff1b\u8c03\u8bd5\u65e5\u5fd7\u4e2d\u4f1a\u663e\u793a\u6709\u6548\u7528\u6237\u540d\uff0c\u4f8b\u5982 user test matched group list …\u3002 \u7ec4\u5339\u914d\u4f1a\u5728\u7528\u6237\u540d\u4e3a\u7a7a\u7684\u60c5\u51b5\u4e0b\u5c1d\u8bd5\u6267\u884c\uff0c\u4ece\u800c\u4ea7\u751f Can’t […]<\/p>\n Read More…<\/a><\/p>\n","protected":false},"author":2,"featured_media":34093,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[12824,12825,12826,12827,12828],"class_list":["post-34096","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-sc","tag-ssh-user-access-restriction","tag-linux-home-directory-permissions","tag-sftp-directory-isolation","tag-openssh-security-settings","tag-hongkong-hosting"],"acf":[],"yoast_head":"\n