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sort sshd_config

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This commit is contained in:
Aminda Suomalainen 2015-09-06 08:12:41 +03:00
parent c3f351d21f
commit dc9f8b0ab5
1 changed files with 60 additions and 42 deletions
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102
etc/ssh/sshd_config
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@ -2,16 +2,41 @@
# be more clear and if they are missed some day, just download # be more clear and if they are missed some day, just download
# upstream config file or take it from any distribution. # upstream config file or take it from any distribution.
Port 22 # Partially based on https://wiki.mozilla.org/Security/Guidelines/OpenSSH
# where some comments are took. Some options look like I don't want to
# change them to get updates when defaults change.
# No environment variable is accepted for security reasons, e.g.
# shellshock worked with remotely accepted environment variables.
#AcceptEnv LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT LC_IDENTIFICATION
# IPv4 & IPv6
AddressFamily any AddressFamily any
ListenAddress 0.0.0.0
ListenAddress ::
# The default requires explicit activation of protocol 1 # Password based logins are disabled - only public key based logins are
Protocol 2 # allowed.
AuthenticationMethods publickey
# HostKeys for protocol version 2 # The default is to check both .ssh/authorized_keys and
# .ssh/authorized_keys2 but this is overridden so installations will only
# check .ssh/authorized_keys.
AuthorizedKeysFile .ssh/authorized_keys
# File to send to client before authentication.
Banner /etc/issue.net
# Disable s/key passwords.
ChallengeResponseAuthentication no
# If the client doesn't reply in three "pings", connection is dead.
# Defaults to 3 anyway, but I add it here for clearity and
# in case it decides to change in the future.
ClientAliveCountMax 3
# "ping" the client every minute.
ClientAliveInterval 60
# HostKeys for protocol version 2.
HostKey /etc/ssh/ssh_host_ed25519_key HostKey /etc/ssh/ssh_host_ed25519_key
HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_rsa_key
@ -19,36 +44,37 @@ HostKey /etc/ssh/ssh_host_rsa_key
# ssh-keygen -t ed25519 -N "" -f /etc/ssh/ssh_host_ed25519_key # ssh-keygen -t ed25519 -N "" -f /etc/ssh/ssh_host_ed25519_key
# ssh-keygen -t rsa -N "" -f /etc/ssh/ssh_host_rsa_key # ssh-keygen -t rsa -N "" -f /etc/ssh/ssh_host_rsa_key
# Uncomment one of the following depending on which OS # Listen on all IPv4 & IPv6 addresses.
## Arch ListenAddress 0.0.0.0
#Subsystem sftp /usr/lib/ssh/sftp-server ListenAddress ::
## Debian
#Subsystem sftp /usr/lib/openssh/sftp-server
# Nothing is Accepted for security reasons, e.g. shellshock worked with # VERBOSE logging, logs user's key fingerprint on login. Needed to have a
# remotely accepted environment variables. # clear audit track of which key was using to log in.
#AcceptEnv LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT LC_IDENTIFICATION
# Logging
LogLevel VERBOSE LogLevel VERBOSE
# Authentication:
PermitRootLogin No
# The default is to check both .ssh/authorized_keys and
# .ssh/authorized_keys2 but this is overridden so installations will only
# check .ssh/authorized_keys
AuthorizedKeysFile .ssh/authorized_keys
# Password based logins are disabled - only public key based logins are
# allowed.
AuthenticationMethods publickey
# Disable tunneled clear text passwords! # Disable tunneled clear text passwords!
PasswordAuthentication no PasswordAuthentication no
# Disable s/key passwords # Auditing reasons, difficult to track which process belongs to which root
ChallengeResponseAuthentication no # user.
PermitRootLogin No
# Listen on the following TCP ports, default 22.
Port 22
# Print /etc/motd (or /etc/profile or equivalent) on login. It's already
# done by PAM, so no need for duplicate MOTDs.
PrintMotd no
# Avoid enabling insecure protocol 1.
Protocol 2
## Enable SFTP. As the subsystem location varies, uncomment the one for the
## OS you use.
## Arch
#Subsystem sftp /usr/lib/ssh/sftp-server
## Debian
#Subsystem sftp /usr/lib/openssh/sftp-server
# Set this to 'yes' to enable PAM authentication, account processing, # Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will # and session processing. If this is enabled, PAM authentication will
@ -61,15 +87,7 @@ ChallengeResponseAuthentication no
# and ChallengeResponseAuthentication to 'no'. # and ChallengeResponseAuthentication to 'no'.
UsePAM yes UsePAM yes
PrintMotd no # pam does that # Use kernel sandbox mechanisms where possible in unprivilegied processes.
UsePrivilegeSeparation sandbox # Default for new installations. # Systrace on OpenBSD, Seccomp on Linux, seatbelt on MacOSX/Darwin,
# rlimit elsewhere.
Banner /etc/issue.net UsePrivilegeSeparation sandbox
# If the client doesn't reply in "three" pings, connection is dead.
# Defaults to 3 anyway, but I add it here for clearity and
# in case it decides to change in the future.
ClientAliveCountMax 3
# "ping" the client every minute.
ClientAliveInterval 60