Difference between revisions of "Nextelco:Phase2"

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*SYSLOG
 
*SYSLOG
  
 +
 +
=== SSH server configuration ===
 +
SSH service provides the possibility to connect and set up the application server remotely. For security reasons, it is really important to deny all connection request coming from other networks. Additionally Root access and Password based authentication should be denied. These are the configuration setting we applied to increase SSH service security:
 +
 +
# 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:
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LoginGraceTime 120
 +
PermitRootLogin no
 +
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 no
 +
 +
# 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
 +
 +
# 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
 +
 +
  
 
Return to [[Nextelco:Technology|Technology]] page.
 
Return to [[Nextelco:Technology|Technology]] page.

Revision as of 10:23, 5 June 2014

Define configuration details of all network devices

In the following Figure shows how different components of the network are interconnected.

Nextelco connection diagram.png


Based on the interconnection schema the following sections show which are the configuration requirements defined for each component.


Application Server

The application server is based on Debian GNU/Linux 7.5 (wheezy). It is really important to be sure that the Application Server is as much as possible protected. For more information visit:

Together with the basic Debian installation these are the services that we will need (list of tools):


SSH server configuration

SSH service provides the possibility to connect and set up the application server remotely. For security reasons, it is really important to deny all connection request coming from other networks. Additionally Root access and Password based authentication should be denied. These are the configuration setting we applied to increase SSH service security: 

# 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 no
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 no

# 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

# 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


Return to Technology page.

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