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openssl genpkey -genparam -algorithm DH -pkeyopt dh_paramgen_prime_len:4096 -out /etc/ssl/dh_params.pem

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sed -e 's/^#\(Protocol\).*$/\1 2/' \
    -e 's/^#\(HostKey /etc/ssh/ssh_host_rsa_key\).*$/\1/' \
    -e 's/^#\(HostKey /etc/ssh/ssh_host_ecdsa_key\).*$/\1/' \
    -e 's/^#\(HostKey /etc/ssh/ssh_host_ed25519_key\).*$/\1/' \
    -e 's/^#\(RekeyLimit\).*$/\1 500M 1h/' \
    -e 's/^#\(LoginGraceTime\).*$/\1 1m/' \
    -e 's/^#\(PermitRootLogin\).*$/\1 yes/' \
    -e 's/^#\(StrictModes\).*$/\1 yes/' \
    -e 's/^#\(MaxAuthTries\).*$/\1 3/' \
    -e 's/^#\(MaxSessions\).*$/\1 10/' \
    -e 's/^#\(RSAAuthentication\).*$/\1 no/' \
    -e 's/^#\(PubkeyAuthentication\).*$/\1 yes/' \
    -e 's/^#\(IgnoreRhosts\).*$/\1 yes/' \
    -e 's/^#\(PasswordAuthentication\).*$/\1 no/' \
    -e 's/^#\(PermitEmptyPasswords\).*$/\1 no/' \
    -e 's/^#\(ChallengeResponseAuthentication\).*$/\1 no/' \
    -e 's/^#\(UsePAM\).*$/\1 no/' \
    -e 's/^#\(AllowAgentForwarding\).*$/\1 no/' \
    -e 's/^#\(AllowTcpForwarding\).*$/\1 no/' \
    -e 's/^#\(GatewayPorts\).*$/\1 no/' \
    -e 's/^#\(X11Forwarding\).*$/\1 no/' \
    -e 's/^#\(PermitTTY\).*$/\1 yes/' \
    -e 's/^#\(UseLogin\).*$/\1 no/' \
    -e 's/^#\(UsePrivilegeSeparation\).*$/\1 sandbox/' \
    -e 's/^#\(PermitUserEnvironment\).*$/\1 no/' \
    -e 's/^#\(UseDNS\).*$/\1 yes/' \
    -e 's/^#\(MaxStartups\).*$/\1 10:30:100/' \
    -e 's/^#\(PermitTunnel\).*$/\1 no/' \
    -e 's/^#\(ChrootDirectory\).*$/\1 %h/' \
    -e 's/^\(Subsystem.*\)$/#\1/' \
    -i '' /etc/ssh/sshd_config
sed: 1: "s/^#\(HostKey /etc/ssh/ ...": RE error: parentheses not balanced

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sed -e 's|^#\(Protocol\).*$|\1 2|' \
    -e 's|^#\(HostKey /etc/ssh/ssh_host_rsa_key\).*$|\1|' \
    -e 's|^#\(HostKey /etc/ssh/ssh_host_ecdsa_key\).*$|\1|' \
    -e 's|^#\(HostKey /etc/ssh/ssh_host_ed25519_key\).*$|\1|' \
    -e 's|^#\(RekeyLimit\).*$|\1 500M 1h|' \
    -e 's|^#\(LoginGraceTime\).*$|\1 1m|' \
    -e 's|^#\(PermitRootLogin\).*$|\1 yes|' \
    -e 's|^#\(StrictModes\).*$|\1 yes|' \
    -e 's|^#\(MaxAuthTries\).*$|\1 3|' \
    -e 's|^#\(MaxSessions\).*$|\1 10|' \
    -e 's|^#\(RSAAuthentication\).*$|\1 no|' \
    -e 's|^#\(PubkeyAuthentication\).*$|\1 yes|' \
    -e 's|^#\(IgnoreRhosts\).*$|\1 yes|' \
    -e 's|^#\(PasswordAuthentication\).*$|\1 no|' \
    -e 's|^#\(PermitEmptyPasswords\).*$|\1 no|' \
    -e 's|^#\(ChallengeResponseAuthentication\).*$|\1 no|' \
    -e 's|^#\(UsePAM\).*$|\1 no|' \
    -e 's|^#\(AllowAgentForwarding\).*$|\1 no|' \
    -e 's|^#\(AllowTcpForwarding\).*$|\1 no|' \
    -e 's|^#\(GatewayPorts\).*$|\1 no|' \
    -e 's|^#\(X11Forwarding\).*$|\1 no|' \
    -e 's|^#\(PermitTTY\).*$|\1 yes|' \
    -e 's|^#\(UseLogin\).*$|\1 no|' \
    -e 's|^#\(UsePrivilegeSeparation\).*$|\1 sandbox|' \
    -e 's|^#\(PermitUserEnvironment\).*$|\1 no|' \
    -e 's|^#\(UseDNS\).*$|\1 yes|' \
    -e 's|^#\(MaxStartups\).*$|\1 10:30:100|' \
    -e 's|^#\(PermitTunnel\).*$|\1 no|' \
    -e 's|^#\(ChrootDirectory\).*$|\1 %h|' \
    -e 's|^\(Subsystem.*\)$|#\1|' \
    -i '' /etc/ssh/sshd_config

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-e 's|^#\(ChrootDirectory\).*$|\1 %h|' \

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Subsystem sftp internal-sftp -u 0027

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tail -n 40 /etc/ssh/sshd_config

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chmod 0755 /usr/home/admin

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tail -n 40 /etc/ssh/sshd_config
#       AllowTcpForwarding no
#       PermitTTY no
#       ForceCommand cvs server

AllowGroups wheel admin sftponly users

Match Group admin
       PasswordAuthentication yes
       ChrootDirectory none

Match Group sftponly
       ForceCommand internal-sftp

Match User root
        ChrootDirectory none

AllowGroups wheel admin sftponly users

Match Group admin
        PasswordAuthentication yes
        ChrootDirectory none

Match Group sftponly
        ForceCommand internal-sftp

Match User root
        ChrootDirectory none
Subsystem sftp internal-sftp -u 0027

AllowGroups wheel admin sftponly users

Match Group admin
        PasswordAuthentication yes
        ChrootDirectory none

Match Group sftponly
        ForceCommand internal-sftp

Match User root
        ChrootDirectory none

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[root@a1404:~] # chmod 0755 /usr/home/admin
[root@a1404:~] # service sshd restart
Performing sanity check on sshd configuration.
/etc/ssh/sshd_config line 182: Directive 'Subsystem' is not allowed within a Match block

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#       $OpenBSD: sshd_config,v 1.93 2014/01/10 05:59:19 djm Exp $
#       $FreeBSD: releng/10.1/crypto/openssh/sshd_config 264692 2014-04-20 12:46:18Z des $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options override the
# default value.

# Note that some of FreeBSD's defaults differ from OpenBSD's, and
# FreeBSD has a few additional options.

Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

# The default requires explicit activation of protocol 1
Protocol 2

# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024

# Ciphers and keying
RekeyLimit 500M 1h
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes256-ctr,aes256-cbc
Macs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512,hmac-sha2-256
KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp521,ecdh-sha2-nistp384,diffie-hellman-group-exchange-sha1

# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

LoginGraceTime 1m
PermitRootLogin yes
StrictModes yes
MaxAuthTries 3
MaxSessions 10

RSAAuthentication no
PubkeyAuthentication yes

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes

# Change to yes to enable built-in password authentication.
PasswordAuthentication no
PermitEmptyPasswords no

# Change to no to disable PAM authentication
ChallengeResponseAuthentication no

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

# Set this to 'no' to disable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM no

AllowAgentForwarding no
AllowTcpForwarding no
GatewayPorts no
X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
PermitTTY yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
UseLogin no
UsePrivilegeSeparation sandbox
PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
UseDNS yes
#PidFile /var/run/sshd.pid
MaxStartups 10:30:100
PermitTunnel no
ChrootDirectory %h
#VersionAddendum FreeBSD-20140420

# no default banner path
#Banner none

# override default of no subsystems
#Subsystem      sftp    /usr/libexec/sftp-server

# Disable HPN tuning improvements.
#HPNDisabled no

# Buffer size for HPN to non-HPN connections.
#HPNBufferSize 2048

# TCP receive socket buffer polling for HPN.  Disable on non autotuning kernels.
#TcpRcvBufPoll yes

# Allow the use of the NONE cipher.
#NoneEnabled no

# Example of overriding settings on a per-user basis
#Match User anoncvs
#       X11Forwarding no
#       AllowTcpForwarding no
#       PermitTTY no
#       ForceCommand cvs server

Subsystem sftp internal-sftp -u 0027

AllowGroups wheel admin sftponly users

Match Group admin
        PasswordAuthentication yes
        ChrootDirectory none

Match Group sftponly
        ForceCommand internal-sftp

Match User root
        ChrootDirectory none