443 Remote Access Service

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A TECHNICAL REPORT ON

REMOTE ACCESS SERVICE

Presented By

P.SATHYANARAYANA(08J91A0443)

ELECTRONICS AND COMMNICATION ENGINEERING

UNDER THE GAUIDANCE OF

Mr.G.VENU

Assistance Professor

ECE Dept.

2011-2012

VIDHYA BHARATHI INISTITUTE OF TECHNOLOGY

(Approved by AICTE,Affiliated to JNTUH)

PEMBARTHI, JANGAON, WARANGAL 506201


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VIDHYA BHARATHI INISTITUTE OF TECHNOLGY(Approved by AICTE,Affiliated to JNTUH)

PEMBARTHI, JANGAON, WARANGAL(A.P) 506201

(Sponsored by Hyndhavi Educational Society)

CERTIFICATE

This is to certify that this Technical Seminar entitled

REMOTE ACCESS SERVICE has been carried out by

P.SATHYANARAYANA (08J91A0443), and under my supervision

guidance and submitted in partial fulfillment of the recuirements for the

award of B.Tech, in ELECTRONICS AND COMMUNICATION

ENGINEERING BY Jawaharlal Nehru Technology University, A.P.

during academic year 2011-2012 in department of Electronics and

communication engineering.

Mr.G.VENU Mr. B.KRANTHI KUMARAssistant professor HOD

Guide ECE Department

Signature: signature:


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TABLE OF CONTENTS

ABSTRACT

ACKNOWLEDGEMENT

TABLE CONTENTS

1.INTRODUCTION

2. TYPES OF RAS2.1 REMOTE CLIENT ACCESS

2.2 SITE-TO-SITE ACCESS

3.USES OF REMOTE ACCESS SERVICE

3.1 REMOTE ACCESS SERVICES BLUEPRINT

3.2 REMOTE ACCESS SERVICE PLANNING

3.3 REMOTE ACCESS SERVICES BUILD

3.4 REMOTE ACCESS SERVICES OPERATION

4 . PURPOSE


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5. RUN TIME REQUIREMENTS

5.1 HARDWARE REQUIREMENTS

5.2 SOFTWARE REQUIREMENTS

5.3 RAS COMMON DIALOGUE BOXES

5.4 MLINKING TO THE REMOTE ACCESS DLL

5.5 RASCONNSTATE

5.6 BLUEPRINT

5.7 VIRTUAL PRIVATE NETWORK (VPN)

6. REMOTE CLIENT ACCESS

6.1VPN REMOTE ACCESS

7. APPLICATIONS

8.CONCLUSION


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ABSTRACT

Users connecting to a ras services, through a modem, can

limited to accessing only that server, or can be access to the entire

network. effectively, this is same as the local connection to the

network, except that any type of data transfer runs significantly slower.

you will need to select connection option appropriate to your access

requirements available support, and budgetary constraints.

In the current business environment, organizations are underpressure to reduce costs, increase efficiency, and maximize

performance from the existing infrastructure. The growth of the

Internet, together with new global business opportunities, makes it

imperative that organizations provide secure 24x7 network access to

employees and locations around the world.


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ACKNOWLEDGEMENT

Iam very thankful toMr. B.KRANTHI KUMAR & G.VENU

who give me the opportunity to do the Project on Remote Accessing

Services. I also want to thank to my all friend who support me to do this

work.

P.SATHYANARAYANA

(08J91A0443)


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1. INTRODUCTION

In most networks clients are connected directly to the

network. In some cases, however remote connection are needed for

your users. Microsoft provides Remote Access Services to set and

configure client access.

Users connecting to a ras services, through a modem, can

limited to accessing only that server, or can be access to the entire

network. effectively, this is same as the local connection to the

network, except that any type of data transfer runs significantly slower.

you will need to select connection option appropriate to your access

requirements available support, and budgetary constraints.

In the current business environment, organizations are under

pressure to reduce costs, increase efficiency, and maximize

performance from the existing infrastructure. The growth of the

Internet, together with new global business opportunities, makes itimperative that organizations provide secure 24x7 network access to

employees and locations around the world.


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2.TYPES OF RAS

2.1 Remote client access

Remote clients are usually single computers, such as home computers or laptops

of employees who need to access enterprise resources while working at home or

traveling.

2.2 Site-to-site access

Site-to-site access is used between branch offices and centralized facilities of the

enterprise to access resources and data at different logical and physical locations.

Both these key remote access requirements of an enterprise

organization can be provided using a VPN. Both of these solutions

require the underlying presence of either a dial-up connection or an

Internet (shared) leased line connection.


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3. USES OF REMOTE ACCESS SERVICE

3.1 Remote Access Services Blueprint

Provides guidance for designing remote access solutions for site-to- site

network links as well as individual remote clients accessing an organization and its IT

resources. The processes identified are designed to ensure that the solution is secure,

scalable, and reliable.

3.2 Remote Access Services Planning

Provides a detailed analysis of the requirements and the desigchoices for

providing remote access services in the CDC and SBO scenarios


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3.3Remote Access Services Build

Provides build, configuration, and test guidance for the different remote

access services, including the use of VPN to connect remote sites and to provide

network access for remote users.

3.4 Remote Access Services Operation

Provides operations references for the remote access services discussed inWSSRA (Windows Server System Remote Architecture.)


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4 . PURPOSE

Use Remote Access Service (RAS) to create client applications. Theseapplications display RAS common dialog boxes, manage

Remote access connections and devices, and manipulate phone-book

entries.


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5. RUN TIME REQUIREMENTS

5.1 Hardware Requirements

There are so many hardware used in Remote access service. but some of them

are:-

1. Dial-in-modem

2. Frame relay

3. ISDN

4. DSL

5. VPN

6. SSH

7. Cable modem

5.2 Software Requirements

The RAS API is designed for use by C/C++ programmers. Microsoft Visual

Basic programmers may also find the API useful. Programmers should be familiar with

networking concepts.

Some of the functions in the RAS API are supported only on network servers

and other functions are supported only on network clients. For more specific information

about which operating systems support a particular function, refer to the Requirements

sections in documentation:-


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5.3 RAS Common Dialog Boxes

Windows provides a set of functions that display the RAS dialog boxes

provided by the system. These functions make it easy for applications to display a

familiar user interface so that users can perform RAS tasks. For example, users can

establish and monitor connections, or work with phone-book entries. Windows 95

does not currently support these functions.

The RasPhonebookDlg function displays the main Dial-Up Networking

dialog box. From this dialog box, the user can dial, edit, or delete a selected phone-

book entry, create a new phone-book entry, or specify user preferences. The

RasPhonebookDlg function uses theRASPBDLG structure to specify additional

input and output parameters. For example, you can set members of the structure to

control the position of the dialog box on the screen. You can use the RASPBDLG

structure to specify aRasPBDlgFunc callback function that receives notifications

of user activity while the dialog box is open. For example, RAS calls your

RasPBDlgFunc function if the user dials, edits, creates, or deletes a phone-book

entry.

You can use the RasDialDlg function to start a RAS connection operation

without displaying the main Dial-Up Networking dialog box. With RasDialDlg,

you specify a phone number or phone-book entry to call. The function displays a

stream of dialog boxes that indicate the state of the connection operation. The

RasDialDlg function uses a RASDIALDLG structure to specify additional input
http://msdn.microsoft.com/library/en-us/rras/rras/rasphonebookdlg.asphttp://msdn.microsoft.com/library/en-us/rras/rras/raspbdlg_str.asphttp://msdn.microsoft.com/library/en-us/rras/rras/raspbdlg_str.asphttp://msdn.microsoft.com/library/en-us/rras/rras/raspbdlgfunc.asphttp://msdn.microsoft.com/library/en-us/rras/rras/raspbdlgfunc.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialdlg.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialdlg_str.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialdlg_str.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasphonebookdlg.asphttp://msdn.microsoft.com/library/en-us/rras/rras/raspbdlg_str.asphttp://msdn.microsoft.com/library/en-us/rras/rras/raspbdlgfunc.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialdlg.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialdlg_str.asp


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and output parameters, such as position of the dialog box and the phone-book

subentry to call.

5.4 Linking to the Remote Access DLL

If an application links statically to the RASAPI32 DLL, the applicationwill fail to load if Remote Access Service is not installed. A RAS application can

load when RAS is not installed by using LoadLibrary to load the DLL, and

GetProcAddress to obtain pointers to the RAS functions.

The RAS functions are located in RASAPI32.DLL. The import library for

these functions is RASAPI32.LIB. To use the RAS functions, your programs must

include the following files:

File Description

RAS.HContains the RAS function prototypes, constants, and structure

definitions.

RASERROR.H Contains the RAS error codes.

5.5 RASCONNSTATE

The RASCONNSTATE enumeration type contains values that specify the

states that can occur during a RAS connection operation. If the RasDial function is

used to establish a RAS connection, specify a window, or a RasDialFunc,

RasDialFunc1, or RasDialFunc2 callback function to receive notification

messages that report the current connection state..
http://msdn.microsoft.com/library/en-us/dllproc/base/loadlibrary.asphttp://msdn.microsoft.com/library/en-us/dllproc/base/loadlibrary.asphttp://msdn.microsoft.com/library/en-us/dllproc/base/getprocaddress.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdial.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc1.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc2.asphttp://msdn.microsoft.com/library/en-us/dllproc/base/loadlibrary.asphttp://msdn.microsoft.com/library/en-us/dllproc/base/getprocaddress.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdial.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc1.asphttp://msdn.microsoft.com/library/en-us/rras/rras/rasdialfunc2.asp


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typedef enum _RASCONNSTATE {

RASCS_OpenPort = 0,

RASCS_PortOpened,

RASCS_ConnectDevice,

RASCS_DeviceConnected,

RASCS_AllDevicesConnected,

RASCS_Authenticate,

RASCS_AuthNotify,

RASCS_AuthRetry,

RASCS_AuthCallback,RASCS_AuthChangePassword,

RASCS_AuthProject,

RASCS_AuthLinkSpeed,

RASCS_AuthAck,

RASCS_ReAuthenticate,

RASCS_Authenticated,

RASCS_PrepareForCallback,

RASCS_WaitForModemReset,

RASCS_WaitForCallback,

RASCS_Projected,


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#if (WINVER >= 0x400)

RASCS_StartAuthentication, // Windows 95 only

RASCS_CallbackComplete, // Windows 95 only

RASCS_LogonNetwork, // Windows 95 only

#endif

RASCS_SubEntryConnected, RASCS_SubEntryDisconnected,

RASCS_Interactive = RASCS_PAUSED,

RASCS_RetryAuthentication,

RASCS_CallbackSetByCaller,

RASCS_PasswordExpired,

#if (WINVER >= 0x500)

RASCS_InvokeEapUI,

#endif

RASCS_Connected = RASCS_DONE,

RASCS_Disconnected

} RASCONNSTATE ;


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5.6 BLUEPRINT

This blueprint provides comprehensive design guidance on remote access

solutions that enable individual remote clients to access an organization's IT

resources. Many organizations provide direct modem-based dial-up capability to

the office for remote users or dedicated leased line connections between different

locations; such remote access is not addressed in this release of Windows Server

System Reference Architecture (WSSRA).

This blueprint provides design guidance for enabling remote access from

network sites and individual remote clients to an enterprise organization and its IT

resources.

5.7 VIRTUAL PRIVATE NETWORK (VPN)

A virtual private network (VPN) is a secure encrypted connection between

two endpoints that is established over a shared connection such as the Internet and

used as an extension of an enterprise network. VPN enables the enterprise to use

the existing global Internet infrastructure by simply connecting an office or user to

an Internet Service Provider (ISP). VPN is also an extensible technology; for

example, Voice over IP (VoIP) can be implemented to allow remote users to use

their office telephone extension (with all of its messaging capabilities) wherever

they may be workat the time. VPNs provide many technical and economic benefits

over the traditional.


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6. REMOTE CLIENT ACCESS

Remote client access to enterprise IT resources, for

small remote offices and traveling users, can be provided

using the following options:

Option 1Dial-up Remote Access

A dial-up remote access connection comprises remote access clients, a remote

access server (RAS), and some telecommunication infrastructure (typically, an analog

phone line). A remote client uses the telecommunication infrastructure to create a

temporary physical or virtual circuit to a port on the RAS. After the circuit is created, the

connection parameters are set. If RAS and remote access clients are not located in a local

telecommunication boundary, incremental long distance charges are incurred. Even

though it has limited scalability, this solution is good for corporations that have a low

requirement for remote access.

Option 2VPN Remote Access

A VPN remote access connection between a user and the enterprise data centerconsists of a VPN client, a VPN device or server, and the Internet. When a client

accesses the Internet through a local ISP, a virtual point-to-point connection is created

with a RAS acting as the VPN server. Once this connection is created, the parameters

for the VPN connection can be set and a VPN tunnel established with the VPN device

or server to access enterprise resources. In this case, the client is not required to dial

long distance.


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6.1 Vpn remote acess


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7 . APPLICATIONS

The Remote Access Service is applicable in any computing environment that uses

a Wide Area Network (WAN) link or a Virtual Private Network (VPN). RAS makes it

possible to connect a remote client computer to a network server over a WAN link or a

VPN. The remote computer then functions on the server's LAN as though the remote

computer was connected to the LAN directly. The RAS API enables programmers to

access the features of RAS programmatically.


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8.CONCLUSION

Remote Access Service solution or a site-to-site linking of networks over a

WAN. The primary method discussed for achieving this was the use of VPNs, and blueprints

which can provide a secure and flexible solution for the enterprise.

The Remote Access Service is applicable in any computing environment that

uses a Wide Area Network (WAN) link or a Virtual Private Network (VPN). RAS makes itpossible to connect a remote

client computer to a network server over a WAN link or a VPN. The remote

computer then functions on the server's LAN as though the remote computer was connected

to the LAN directly. The RAS API enables programmers to access the features of RAS

programmatically.


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443 Remote Access Service

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