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✏️ Editing: access.conf

# Login access control table.
#
# Comment line must start with "#", no space at front.
# Order of lines is important.
#
# When someone logs in, the table is scanned for the first entry that
# matches the (user, host) combination, or, in case of non-networked
# logins, the first entry that matches the (user, tty) combination.  The
# permissions field of that table entry determines whether the login will
# be accepted or refused.
#
# Format of the login access control table is three fields separated by a
# ":" character:
#
# [Note, if you supply a 'fieldsep=|' argument to the pam_access.so
# module, you can change the field separation character to be
# '|'. This is useful for configurations where you are trying to use
# pam_access with X applications that provide PAM_TTY values that are
# the display variable like "host:0".]
#
# 	permission:users:origins
#
# The first field should be a "+" (access granted) or "-" (access denied)
# character.
#
# The second field should be a list of one or more login names, group
# names, or ALL (always matches). A pattern of the form user@host is
# matched when the login name matches the "user" part, and when the
# "host" part matches the local machine name.
#
# The third field should be a list of one or more tty names (for
# non-networked logins), host names, domain names (begin with "."), host
# addresses, internet network numbers (end with "."), ALL (always
# matches), NONE (matches no tty on non-networked logins) or
# LOCAL (matches any string that does not contain a "." character).
#
# You can use @netgroupname in host or user patterns; this even works
# for @usergroup@@hostgroup patterns.
#
# The EXCEPT operator makes it possible to write very compact rules.
#
# The group file is searched only when a name does not match that of the
# logged-in user. Both the user's primary group is matched, as well as
# groups in which users are explicitly listed.
# To avoid problems with accounts, which have the same name as a group,
# you can use brackets around group names '(group)' to differentiate.
# In this case, you should also set the "nodefgroup" option.
#
# TTY NAMES: Must be in the form returned by ttyname(3) less the initial
# "/dev" (e.g. tty1 or vc/1)
#
##############################################################################
#
# Disallow non-root logins on tty1
#
#-:ALL EXCEPT root:tty1
#
# Disallow console logins to all but a few accounts.
#
#-:ALL EXCEPT wheel shutdown sync:LOCAL
#
# Same, but make sure that really the group wheel and not the user
# wheel is used (use nodefgroup argument, too):
#
#-:ALL EXCEPT (wheel) shutdown sync:LOCAL
#
# Disallow non-local logins to privileged accounts (group wheel).
#
#-:wheel:ALL EXCEPT LOCAL .win.tue.nl
#
# Some accounts are not allowed to login from anywhere:
#
#-:wsbscaro wsbsecr wsbspac wsbsym wscosor wstaiwde:ALL
#
# All other accounts are allowed to login from anywhere.
#
##############################################################################
# All lines from here up to the end are building a more complex example.
##############################################################################
#
# User "root" should be allowed to get access via cron .. tty5 tty6.
#+:root:cron crond :0 tty1 tty2 tty3 tty4 tty5 tty6
#
# User "root" should be allowed to get access from hosts with ip addresses.
#+:root:192.168.200.1 192.168.200.4 192.168.200.9
#+:root:127.0.0.1
#
# User "root" should get access from network 192.168.201.
# This term will be evaluated by string matching.
# comment: It might be better to use network/netmask instead.
#          The same is 192.168.201.0/24 or 192.168.201.0/255.255.255.0
#+:root:192.168.201.
#
# User "root" should be able to have access from domain.
# Uses string matching also.
#+:root:.foo.bar.org
#
# User "root" should be denied to get access from all other sources.
#-:root:ALL
#
# User "foo" and members of netgroup "nis_group" should be
# allowed to get access from all sources.
# This will only work if netgroup service is available.
#+:@nis_group foo:ALL
#
# User "john" should get access from ipv4 net/mask
#+:john:127.0.0.0/24
#
# User "john" should get access from ipv4 as ipv6 net/mask
#+:john:::ffff:127.0.0.0/127
#
# User "john" should get access from ipv6 host address
#+:john:2001:4ca0:0:101::1
#
# User "john" should get access from ipv6 host address (same as above)
#+:john:2001:4ca0:0:101:0:0:0:1
#
# User "john" should get access from ipv6 net/mask
#+:john:2001:4ca0:0:101::/64
#
# All other users should be denied to get access from all sources.
#-:ALL:ALL

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