RAS (Remote Access Service)

It is a feature of 2000 & 2003 enables communication between a local machine & a remote machine

RAS connectivity:

Types of connectivity

PSTN (public switch telephone network)
ISDN (Integrated Services Digital Network)
X.25
RS 232 (Recommended standard)
DSL (Digital Subscriber Link)
Direct cable

PSTN:

1. Modem
2. Telephone line
3. 28.8 kbps
4. Cheaper
5. Analog communication

ISDN:

1. ISDN adaptors (TA)
2. ISDN line
3. 64- 128 kbps
4. Digital communication
5. Costly


X – 25

1. PADS (frame relay)
2. Packet switching n/w
3. Rarely found
4. PADS - Packet Assemblers & De assemblers

RS – 232

1. Serial cable (direct cable)
2. Provides serial communication
3. Used for testing RAS
4. Provides RAS environment
5. It is also called as ‘Null modem’.

DSL (Digital Subscriber Link)

1. DSL modem or NIC
2. Widely available
3. Easy to implement

Direct cable

1. When we are in same geographical
2. Implemented only in LAN
3. Bridge modem (special devices)
4. Uses a direct cable to establish a communication between local& remote network

Installing Modem:

On server& client
Open control panel
Open phone & modems
Click on modems – add
Check box don’t detect modem
Select communication between two computers
Select comp1 – next – finish
Same process in client machine also

Enabling routing on DC

Open RRAS
Right click server
Configure & enable routing
Next – custom configuration
Next – select VPN, dial up – next – finish.

Creating a dial connection

On the client machine
My network places - properties
Double click on new connection wizard
Next – select setup &advance connection
Next - connect directly to another computer – guest – next –computer name (server’s name)
Select the device ‘communication cable between 2 computers
Connection availability – next – finish

Note: By default users are denied permission to dial in.

To enable a user to dial in
On server
Open ADUC
Go to user properties
Dial in
Allow access – ok

Error: 649 - enable the user dial in access
Error: 777 – Reinstall the modem.

Establishing Dial up connection

Dialing into the server
On the client machine
My network places – properties
Double click DUN we’ve created
Provide user name & pwd
Click on connect

Accessing resources of a remote computer over RAS connection

On the client machine
Start – run (\\server name\resource name) ex: (\\sys1\c$)