Task #729
Milestone #728: Server security
Modify sshd_config in /etc/ssh in Montecillo
Description
Package generated configuration file¶
See the sshd_config(5) manpage for details¶
What ports, IPs and protocols we listen for¶
Port 22
Use these options to restrict which interfaces/protocols sshd will bind to¶
#ListenAddress ::
#ListenAddress 0.0.0.0
Protocol 2
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
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
Lifetime and size of ephemeral version 1 server key¶
KeyRegenerationInterval 3600
ServerKeyBits 768
Logging¶
SyslogFacility AUTH
LogLevel INFO
Authentication:¶
LoginGraceTime 120
PermitRootLogin yes
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %h/.ssh/authorized_keys
Don't read the user's ~/.rhosts and ~/.shosts files¶
IgnoreRhosts yes
For this to work you will also need host keys in /etc/ssh_known_hosts¶
RhostsRSAAuthentication no
similar for protocol version 2¶
HostbasedAuthentication no
Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication¶
#IgnoreUserKnownHosts yes
To enable empty passwords, change to yes (NOT RECOMMENDED)¶
PermitEmptyPasswords no
Change to yes to enable challenge-response passwords (beware issues with¶
some PAM modules and threads)¶
ChallengeResponseAuthentication no
Change to no to disable tunnelled clear text passwords¶
#PasswordAuthentication yes
Kerberos options¶
#KerberosAuthentication no
#KerberosGetAFSToken no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
GSSAPI options¶
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
#UseLogin no
#MaxStartups 10:30:60
#Banner /etc/issue.net
Allow client to pass locale environment variables¶
AcceptEnv LANG LC_*
#Subsystem sftp /usr/lib/openssh/sftp-server
Subsystem sftp internal-sftp
Set this to 'yes' to enable 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 yes
UseDNS no
Match user cesar
ChrootDirectory %h
ForceCommand internal-sftp
AllowTCPForwarding no
Match user tuser
ChrootDirectory /chroot
AllowTCPForwarding no
X11Forwarding no
History
#1 Updated by Jose Gomero over 8 years ago
Antes figuraba en la parte del usuario cesar, lo siguiente:
Match user cesar
ChrootDirectory /chroot
AllowTCPForwarding no
X11Forwarding no
En el Codigo anterior a este debio decir lo siguiente:
Match user cesar
ChrootDirectory %h
ForceCommand internal-sftp
AllowTCPForwarding no
X11Forwarding no
#2 Updated by Jose Gomero over 8 years ago
Correcion Final :
UsePAM yes
UseDNS no
Match user cesar
ChrootDirectory /chroot
ForceCommand internal-sftp
AllowTCPForwarding no
X11Forwarding no
Match user tuser
ChrootDirectory /chroot
AllowTCPForwarding no
X11Forwarding no