Securing Debian Manual: 4.16.2 The ext2 filesystem specific attributes (chattr/lsattr)
"In addition to the usual Unix permissions, the ext2 and ext3
filesystems offer a set of specific attributes that give you more
control over the files on your system."
What about ext4 and others?
"Now that the capability has been removed from the system, an intruder
cannot change any attribute on the protected files, and thus cannot
change or remove the files. If he forces the machine to reboot (which
is the only way to restore the capabilities bounding set), it will
easily be detected, and the capability will be removed again as soon
as the system restarts anyway. The only way to change a protected file
would be to boot the system in single-user mode or using another
bootdisk, two operations that require physical access to the machine
What about the remote connections?
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