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File Name : README.privsep

Privilege separation, or privsep, is method in OpenSSH by which
operations that require root privilege are performed by a separate
privileged monitor process.  Its purpose is to prevent privilege
escalation by containing corruption to an unprivileged process.
More information is available at:
	http://www.citi.umich.edu/u/provos/ssh/privsep.html

Privilege separation is now mandatory.  During the pre-authentication
phase sshd will chroot(2) to "/var/empty" and change its privileges to the
"sshd" user and its primary group.  sshd is a pseudo-account that should
not be used by other daemons, and must be locked and should contain a
"nologin" or invalid shell.

You should do something like the following to prepare the privsep
preauth environment:

# mkdir /var/empty
	# chown root:sys /var/empty
	# chmod 755 /var/empty
	# groupadd sshd
	# useradd -g sshd -c 'sshd privsep' -d /var/empty -s /bin/false sshd

/var/empty should not contain any files.

configure supports the following options to change the default
privsep user and chroot directory:

--with-privsep-path=xxx Path for privilege separation chroot
  --with-privsep-user=user Specify non-privileged user for privilege separation

PAM-enabled OpenSSH is known to function with privsep on AIX, FreeBSD, 
HP-UX (including Trusted Mode), Linux, NetBSD and Solaris.

On Cygwin, Tru64 Unix and OpenServer only the pre-authentication part
of privsep is supported.  Post-authentication privsep is disabled
automatically (so you won't see the additional process mentioned below).

Note that for a normal interactive login with a shell, enabling privsep
will require 1 additional process per login session.

Given the following process listing (from HP-UX):

UID   PID  PPID  C    STIME TTY       TIME COMMAND
    root  1005     1  0 10:45:17 ?         0:08 /opt/openssh/sbin/sshd -u0
    root  6917  1005  0 15:19:16 ?         0:00 sshd: stevesk [priv]
 stevesk  6919  6917  0 15:19:17 ?         0:03 sshd: stevesk@2
 stevesk  6921  6919  0 15:19:17 pts/2     0:00 -bash

process 1005 is the sshd process listening for new connections.
process 6917 is the privileged monitor process, 6919 is the user owned
sshd process and 6921 is the shell process.

System Information
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File : BlackDragon /acciones/about.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2025-05-21 04:03:37
..	dir	-	root/root	0755	2025-08-26 06:54:37
CREDITS	file	5.37 KB	root/root	0644	2021-08-20 04:03:49
ChangeLog	file	441.43 KB	root/root	0644	2021-08-20 04:06:37
OVERVIEW	file	6.18 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL	file	21.88 KB	root/root	0644	2025-03-13 01:02:41
PROTOCOL.agent	file	243 B	root/root	0644	2021-08-20 04:03:49
PROTOCOL.certkeys	file	12.83 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.chacha20poly1305	file	4.52 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.cve-2023-48795	file	20.57 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.key	file	1.58 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.krl	file	5.13 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.mux	file	8.87 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.sshsig	file	3.34 KB	root/root	0644	2021-08-20 04:03:49
PROTOCOL.u2f	file	10.82 KB	root/root	0644	2021-08-20 04:03:49
README	file	2.08 KB	root/root	0644	2021-08-20 04:03:49
README.dns	file	1.58 KB	root/root	0644	2021-08-20 04:03:49
README.platform	file	3.96 KB	root/root	0644	2021-08-20 04:03:49
README.privsep	file	2.16 KB	root/root	0644	2021-08-20 04:03:49
README.tun	file	4.78 KB	root/root	0644	2021-08-20 04:03:49
TODO	file	2.54 KB	root/root	0644	2021-08-20 04:03:49