1. Remote Networking Architectures
What is Remote Networking?
Remote Access Networking
Virtual Private Networks (VPN)
Remote Control Computing

2. What is Remote Networking?
A type of network communication that enable users to access resources that are not at their physical location.
Internet
Remote Computer
Remote access server
Network Resources

3. Remote Access Networking
A type of network communication that enables a user to access a computer or network from a remote distance.
Internet
Client configured for remote access
via the internet
Server configured to receive remote access
connections from the internet
Client configured for
direct dial-up access
Server configured to receive
dial-up connections

4. Remote Access Authentication Process
Remote Access Server
Remote Client
Step 1 : A remote user initiates a session.
Step 2 : The remote computer requests connection to a remote access server.
Step 3 : The remote server acknowledges the connection.
Step 4 : The client is requested to authenticate itself by using a remote authentication protocol.
Step 5 : A connection is established between both computers by using the agreed-upon authentication protocol and credentials.

5. Protocols used in Remote Access Networking
Point-to-Point Protocol (PPP)
Password Authentication Protocol (PAP)
Challenge Handshake Authentication Protocol (CHAP)
Remote Authentication Dial-In User Service (RADIUS)
Terminal Access Controller Access Control System (TACACS)
Diameter

6. Password Authentication Protocol
An authentication method that sends clients IDs and passwords as clear text.
Client identifies itself
Server requests verification
Client provides password

7. Challenge Handshake Authentication Protocol (CHAP) Process
An authentication method that is used for encrypting clients’ IDs and passwords.
Logon requested
Challenge
Response
Logon accepted

8. The CHAP Process
Step 1 : A remote client requests a connection to the remote
access server.
Step 2 : The remote server sends a challenge sequence, which
is usually a random value.
Step 3 : The remote client uses its password to encrypt the
challenge sequence and sends the results to the
server.
Step 4 : The server verifies the response and allows access to
resources.

9. Remote Authentication Dial-In User Service (RADIUS)
Remote clients connect
to dial-up servers
Dial-up servers receive requests and
pass credentials to RADIUS sever
RADIUS server accepts
and processes all
authentication requests
RADIUS server
Dial-up servers configured as RADIUS clients
Remote Clients

10. Tunneling
A data-transport technique whereby a data packet from one protocol is transferred inside the frame or packet of another protocol.
IP data unencapsulated
Carrier protocol (IP)
moves the data
Internet
Passenger protocol
enters the network
Passenger protocol
leaves the network
ISP
IP data encapsulated

11. Virtual Private Networks (VPN)
VPN endpoint
Public network
VPN endpoint
VPN endpoint
Private network
Private network
VPN endpoint
VPN endpoint
Private network

12. Types of Virtual Private Networks (VPN)
Access Virtual Private Network
Intranet Virtual Private Network
Extranet Virtual Private Network

13. Access Virtual Private Network
A type of VPN that provides remote access to single users via dial-up, ISDN, xDSL and cable modem connections.
Internet
ISP
Remote client
Main Office
VPN router
Provides hardware
based VPN

14. Intranet Virtual Private Network
A type of VPN that connects sections of network , such as remote offices tying into a corporate headquarters.
Internet
Provides hardware
based VPN
Intranet remote office
VPN router
ISP
Intranet
main office

15. Extranet Virtual Private Network
A type of VPN that connects networks belonging to different companies for the purpose of sharing resources.
Intranet main office
VPN router
Internet
VPN router
ISP
ISP
VPN router
Intranet remote office
Extranet partner office

16. Secure Socket Layer VPN (SSL VPN)
A VPN format that works with a web browser.
Encryption protocols
Secure the data
Tunneling protocols
secure the path
Internet
T-1
CSU/DSU
VPN server
ISP
Encryption protocols secure the data

17. Protocols used in Virtual Private Network
Point-to-Point Tunneling Protocol (PPTP)
Layer Two Tunneling Protocol (L2TP)

18. VPN Concentrator
A device that allow users to use an encrypted tunnel to securely access a corporate or other network via the internet.
Main Office
VPN Concentrator
Internet
ISP
ISP
Branch Office
Remote user
Remote user

19. Remote Control Computing
A type of network communication that uses special software package that enables a remote client to take over a host computer on the network, as well as run applications from a server.
Host client should be
a dedicated server
Internet
Remote client
Host client

20. Protocols used in Remote Control
Remote Desktop Protocol (RDP)
Virtual Network Computing (VNC)
ICA (Independent Computing Architecture)
X Windows System

21. Benefits of Remote Control Computing
Supports connection and communication of multiple devices.
Provides enhanced security due to implementation of both basic and advanced encryption schemes.
Provides Remote Desktop Connection for sever administration and maintenance.
Provides a centralized system for application deployments and remote access to those applications.

22. Microsoft Windows Terminal Services
A Client/Server system that enables multiple clients to run applications or manage a server remotely.
Terminal Server
Remote Clients

23. Web-Based Remote Access
A type of network communication that provides remote access to services and data via web browsers.
Remote user accesses
applications via a web browser
Internet
Remote administrator manages
application servers via a web browser
Web servers host
applications