Transcript Dial-On-Demand Server

Dial-On-Demand Server
Steve Castellotti
Manuel Perez
Reasoning
• Increased of Speed and Performances of
Computers
• Most of this Power not needed to
accomplish basic tasks
Purpose
• To show that an end of life-cycle computer
can still be used in today’s Internet
application by using the bare minimum
requirement
• Set Up a Dial-On-Demand Server with
Firewall Capabilty
The System
• Computer: 386/sx - 16mhz
4mb Ram
40 mb Hard Drive
• Software: Debian 2.1 using Kernel 2.0.38
Installation Process
• Install Operating System
Swap File Issues
• Delete Unnecessary Material
• Setup Software and recompile Kernel
• Initialize configuration
Key Terms
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Dial-On-Demand
Firewall
IP Masquerading
DHCP
PPP
Dial-On-Demand
• If connection to internet does not exist, set
up connection
• If connection exist, reset timer
• Only use Internet when needed
• Set up specific connection times
Firewall
• Protect Private LAN from Outside World
• Trust user to know what he is doing when
he access outside information.
IP Masquerading
• Make all request for the outside information
appear as if it is coming from one IP
• Protects internal LAN
• Removes limitations of one IP address for
the network
DHCP
• Dynamic Host Configuration Protocol
• Simplifies configuration of network clients
• Get IP address from Table or pool of
available of IP address.
PPP
• Peer to Peer Protocol
• Allows creation of IP protocols and other
network protocols over a serial link
• Standard internet connection protocol (used
by Windows, MacOS, etc.)
Network Layout
Network Layout ( Cont. )
• 3 Clients
Faustulus
Remus
Sabine
• 2 Servers
Romulus ( Inside Server )
Closet ( Outside Server )
Benefits of this System
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1 IP address Needed
Money saved by not needing more IP’s
Service Provider has no problem
Internal Machines protected by Firewall
Idle time cut short by DialD
Benefits of this System ( Cont. )
• Internal Machines believe they have direct
connection
• Internal Machines don’t have to be special
configured
• Cheap and abundant hardware ( 10 years )
• Free Software and Documentation
Disadvantages
• Internal servers have to have special
settings
• Some protocols don’t perform under IP
Masquerading correctly
• Limitation of Multi-Player games
• Requires knowledge and time to setup and
test.
Future Consideration
• Can be used as a firewall for DSL, ISDN,
and Cable Modem
• Can be used as a backup connection to the
internet
• Replace need for proprietary software and
hardware so it saves cost
Future Consideration
• You can set up an S/WAN VPN between
two sites
• You should be able to call the modem and
log on to the system. Instruct System to log
on after hang up.