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Hi, |
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On Sun, Mar 25, 2007 at 05:17:39PM +0100, Justin Heesemann wrote: |
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> since the default role for root is staff_t, who's not allowed (almost) |
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> anything.. |
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> i wonder how to manage to backup stuff to another server. |
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the backup-ed server should run that rsync process in a special domain that allows almost any file being read from the filesystem. |
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for that you can have a rsync binary in a non-standard location, with a new label (say backup_exec_t). staff_t will be allowed to execute and trans to say backup_t. |
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type backup_t, domain, privlog, auth_chkpwd, auth; |
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type backup_exec_t, file_type, sysadmfile; |
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role staff_r types backup_t; |
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domain_auto_trans(staff_t, backup_exec_t, backup_t); |
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allow backup_t { file_type -shadow_t -portage_fetch_tmp_t -sysfs_t }:file { getattr read }; |
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allow backup_t { file_type }:lnk_file { getattr read }; |
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allow backup_t { file_type }:fifo_file getattr; |
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allow backup_t { file_type }:sock_file getattr; |
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allow backup_t { file_type -mnt_t -proc_t -sysfs_t }:dir { getattr read search }; |
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|
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[..] |
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you only have to make sure that no wrongdoers can execute that special rsync binary of yours or you have a serious security problem. |
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the destination labels are not important, since the stock rsync does not also take extended filesystem attributes into account. |
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> |
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> localhost home # rsync --dry-run jh root@backup-server:/home/jh |
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> Password: |
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> bash: /root/.bashrc: Permission denied |
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> skipping directory jh |
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> rsync: ERROR: cannot stat destination "/home/jh": Permission denied (13) |
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> rsync error: errors selecting input/output files, dirs (code 3) at |
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> main.c(507) [receiver=2.6.9] |
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> rsync: connection unexpectedly closed (8 bytes received so far) [sender] |
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> rsync error: error in rsync protocol data stream (code 12) at io.c(453) |
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> [sender=2.6.9] |
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> |
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> |
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> i'm open for any ideas.. |
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> both "localhost" and "backup-server" are protected by selinux. |
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> |
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> |
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> -- |
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> Best Regards, |
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> Justin |
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> -- |
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> gentoo-hardened@g.o mailing list |
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> |
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bye, |
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peter |
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|
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-- |
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petre rodan |
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<kaiowas@g.o> |
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Developer, |
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Hardened Gentoo Linux |
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