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Seminar ReportON
Secure Network
Project “SECURE NETWORK” provides configuration for LAN in an institution or in an organization through LINUX Shell Scripting.
The DHCP server provides automatic IP Addresses when the user connects to the internet
PROXY server is used to block and allow specific websites
To automate the whole process of internet configuration
Whole process is secured and user friendly and this is done with the help of dialog boxes.
Logs for daily monitoring of web sites accessed by users are maintained
Manage user feature is done by Mac Address binding.
Officially introduced only in 1991 by its famed creator Linux Torvalds
Linux is a kernel.
Open Source:
source code of the software is made freely available
Security
Scalability
Not Single Source Software
Rate of Advancement
Support
Reliability
Cost
Server can be used as a base from which attacks on other systems can be launched.
E-mail server could be used as a by spammers.
DoS (Denial of Service) attacks which renders servers
Credit card numbers or account numbers and passwords can be targets
Shell Script is series of command written in plain text file.
Shell script can take input from user, file and output them on screen.
Useful to create our own commands.
Save lots of time.
To automate some task of day today life.
System Administration part can be also automated
Package: dhcp
Daemon: /usr/sbin/dhcpd
Script: /etc/init.d/dhcpd
Ports: 67 & 68
Configuration file: /etc/dhcpd.conf
IP addresses can be reserved for clients based on MAC addresses and host names
For security, the lease of IP addresses can be restricted to clients with known MAC addresses
In most cases, the IP address is automatically renewed when a clients logs into a network
The IP address assigned is taken from a pool of IP addresses defined as the scope of IP addresses available for assignment
A user can manually release and renew an IP address by typing the commands "ipconfig /release", followed by"ipconfig /renew" in the command prompt
Package: squid
Daemon: /usr/sbin/squid
Script: /etc/init.d/squid
Ports: 3128
Configuration file: /etc/squid/squid.conf
To provide indirect Internet access.
Firewall Machine.
Allow to see who is accessing.
A network point that acts as an entrance to another network
Also a proxy server and a firewall server
Work on all seven OSI layers
Implement in Hardware & Software
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