Open Source Networking with Vyatta
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This document introduces Vyatta, an open source networking platform that provides routing, firewall, VPN, and other networking services. It can replace proprietary routers and firewall appliances. Vyatta offers these services through a Linux-based software package that runs on standard x86 hardware, providing flexibility and cost savings compared to dedicated hardware appliances. The document provides examples of how Vyatta can be used by both home and enterprise networking environments.
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@ Updates
-Update manager
-Enable automatic security updates(Update Setting)
=> Super windows => type the key word (System Setting) =>
@ Firewall
-In Ubuntu all ports are block by default
-Default firewall-ufw (turned off by default)
+sudo ufw status
+sudo ufw enable/disable
-Firestarter for graphical interface (recommanded)
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+Preferences
@ User Accounts
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-Do not use root user (Disable by default)
+sudo passwd
+sudo passwd -l root (disable/changed expiry password)
-Use sudo instead of root (/etc/sudoers)
+sudo visudo OR sudo gedit /etc/sudoers(To set the privilege user authorized)
+sudo adduser tolaleng sudo
-Deleting Users
+sudo deluser canamall
-Removing world readable permission to home directory
+sudo chmod 0750 /home/username
-Locking/Unlocking user
+sudo passwd -l username (enable user expiry)
+sudo passwd -u username (disable user expiry)
-passwords
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+sudo chage-l canamall (show the password expiration)
@ Antivirus
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@ Unistall Applications
-Ubuntu Software Center-> Installed software section-> Select application and click remove
@ Processes
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+system monitor(cacti, nagios,)
-
@ Logs
-Some of logs
+ /var/log/messages : general log messages
+ /var/log/boot : system boot log
+ /var/log/debug/ : debugging log messages
+ /var/log/auth.log : user login and authentication logs
+ /var/log/daemon.log : running services such as squid,ntpd and other log message to this file
+ /var/log/kern.log : kernel log file
-Viewing logs
+ tail, more, cat, less, grep
+ GNOME system log viewer
@Firewall
ufw
=> Security Host
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* Secure remote network and host
-Telnet(Secure with the host and address connection)
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=> Security Backup (Data Hosting)
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For this lab exercise, we will be using two machines, one machine will behave like an Enterprise and the other machine will behave like machines outside an enterprise. We will call this machine as External, external to the enterprise. The firewall, as part of the enterprise will control traffic both coming into the enterprise and going out of the enterprise (to External).
NIXENT01 (Enterprise) is a CentOS 7 machine.CentOS is a Linux distribution that attempts to provide a free, enterprise-class, community-supported computing platform. Firewalld will be running on this host.
NIXEXT01 (External) is Kali Linux. Kali Linux is a Debian-based Linux distribution aimed at advanced Penetration Testing and Security Auditing. Kali contains several hundred tools which are geared towards various information security tasks, such as Penetration Testing, Security research, Computer Forensics and Reverse Engineering. You have already used this machine for Lab2 and Lab 3 in analyzing packets using Wireshark. (Wireshark is available as part of Kali distribution.)
Although there are only two machines, we are going to pretend that the Enterprise has three machines (three IP addresses) and each machine has certain services running on those machines, as follows:
NIXENT01 (Enterprise)
Service
Associated IP Address
domain, telnet
192.168.10.10
http, https
192.168.10.20
ftp, imap2, imaps, pop3, pop3s, urd
192.168.10.30
Similarly, we are going to emulate three machines on the External machine with three IP addresses, each running only certain services as follows:
NIXEXT01 (External)
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http, https
192.168.10.220
ftp, imap, imaps, pop3, pop3s, urd
192.168.10.230
The instructions to use the remote UMUC machine in the DaaS environment is provided in the Accessing Remote DaaS Lab under Course Content.
Allocating the Lab Machines
Once you open the Lab Broker using the instructions given in ...
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