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Top Forums UNIX for Advanced & Expert Users Stop root from writing to directory Post 303041316 by Neo on Thursday 21st of November 2019 09:14:29 AM
Old 11-21-2019
Quote:
Originally Posted by foad

....

The usual remedy if you want some file(-space) to be protected from roots tampering is to put it off the server: create an NFS share on some remote server, mount it where you want to be protected from roots access and adjust the rights accordingly. This is the common way of i.e. protecting logs from possible tampering.
Let me correct your words here.

This is not a "usual remedy", but it is one technical control in wide a range of possible technical controls based on the risk profile of the server.

I don't have a lot of time to write a long reply, so let me summarize:

Security is defined, generally, in three areas (1) confidentiality, (2) integrity and (3) availability.

The original poster has not defined which of these are the most critical to their organization / application / server.

For example, the application on this server may be less interested in file integrity than high availability. If that is the case, then having a network mounted device may not provide the insured availability because networks can fail, wires can break, network devices can go down, even unplugged, etc. In one datacenter I worked, I watched a major device fail because a manager rolled his chair (sitting in the chair) over a LAN cable while talking to the team.

Anyway, it is important, when talking about IT security to talk about the risk and define the risk profile; because what is correct for one application / server may not be the best for another; and the controls: (1) techincal,(2) administration and (3) physical.

More later, if this thread gains any traction.
 

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volmgt_root(3VOLMGT)					Volume Management Library Functions				      volmgt_root(3VOLMGT)

NAME
volmgt_root - return the Volume Management root directory SYNOPSIS
cc [ flag ... ] file ... -lvolmgt [ library ... ] #include <volmgt.h> const char *volmgt_root(void); DESCRIPTION
The volmgt_root() function returns the current Volume Management root directory, which by default is /vol but can be configured to be in a different location. RETURN VALUES
The volmgt_root() function returns pointer to a static string containing the root directory for Volume Management. ERRORS
This function may fail if an open() of /dev/volctl fails. If this occurs a pointer to the default Volume Management root directory is returned. EXAMPLES
Example 1: Finding the Volume Management root directory. To find out where the Volume Management root directory is: if ((path = volmgt_root()) != NULL) { (void) printf("Volume Management root dir=%s ", path); } else { (void) printf("can't find Volume Management root dir "); } FILES
/vol default location for the Volume Management root directory ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
cc(1B), vold(1M), open(2), volmgt_check(3VOLMGT), volmgt_inuse(3VOLMGT), volmgt_running(3VOLMGT), attributes(5), volfs(7FS) NOTES
This function returns the default root directory location even when Volume Management is not running. SunOS 5.10 1 Feb 2001 volmgt_root(3VOLMGT)
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