remote access authentication protocols

^{The different authentication mechanisms that may be used with remote access services are:}

• PAP. Password Authentication Protocol. Passwords are sent in clear text so PAP is rarely used today.
• CHAP. Challenge Handshake Authentication Protocol. CHAP uses a handshake process where the server challenges the client. The client then responds with appropriate authentication information.
• MS-CHAP. Microsoft’s implementation of CHAP, which is used only by Microsoft clients.
• MS-CHAPv2. An improvement over MS-CHAP. A significant improvement of MS-CHAPv2 over MS-CHAP is the ability to perform mutual authentication.
• RADIUS. Remote Authentication Dial-In User Service. Radius provides a centralized method of authentication for multiple remote access services servers. RADIUS encrypts the password packets, but not the entire authentication process.
TACACS and XTACACS. Terminal Access Controller Access-Control System (TACACS) is a remote authentication protocol that was commonly used in UNIX networks. ...
TACACS+. Terminal Access Controller Access-Control System+ (TACACS) is an alternative to RADIUS and is proprietary to Cisco systems. ...

What are the different authentication mechanisms used with remote access services?

The different authentication mechanisms that may be used with remote access services are: PAP. Password Authentication Protocol. CHAP. Challenge Handshake Authentication Protocol. MS-CHAP. Microsoft’s implementation of CHAP, which is used only by Microsoft clients. MS-CHAPv2. An improvement over MS-CHAP. RADIUS.

What is remote access authentication protocol (rap)?

A remote access authentication protocol is the method by which remote users will be authenticated when they log on the network. One (unwise) choice is to allow users to log on without authentication.

What are the different types of authentication protocols?

1. Kerberos :. Kerberos is a protocol that aids in network authentication. This is used for validating clients/servers... 2. Lightweight Directory Access Protocol (LDAP) :. LDAP refers to Lightweight Directory Access Protocol. It is a... 3. OAuth2 :. OAuth as the name suggests it is an ...

What are the different types of remote access protocols?

The primary remote access protocols in use today are the Serial Line Internet Protocol (SLIP), Point-to-Point Protocol (PPP), Point-to-Point Protocol over Ethernet (PPPoE), Point-to-Point Tunneling Protocol (PPTP), Remote Access Services (RAS), and Remote Desktop Protocol (RDP).

Which protocol is secure for remote access?

Remote Desktop Protocol (RDP)Remote Desktop Protocol (RDP) is a Microsoft proprietary protocol that enables remote connections to other computers, typically over TCP port 3389. It provides network access for a remote user over an encrypted channel.

What is the best remote access authentication?

Extensible Authentication Protocol-Transport Level Security is the most secure remote authentication protocol. It uses certificates on both the client and the server to provide mutual authentication, data integrity, and data confidentiality.

What protocols are used for authentication?

TypesPAP - Password Authentication Protocol.CHAP - Challenge-handshake authentication protocol.EAP - Extensible Authentication Protocol.TACACS, XTACACS and TACACS+RADIUS.DIAMETER.Kerberos (protocol)

What are 4 methods of authentication?

The most common authentication methods are Password Authentication Protocol (PAP), Authentication Token, Symmetric-Key Authentication, and Biometric Authentication.

What is CHAP protocol used for?

CHAP (Challenge-Handshake Authentication Protocol) is a challenge and response authentication method that Point-to-Point Protocol (PPP) servers use to verify the identity of a remote user.

How does remote user authentication work?

In remote user authentication scheme, the user is assigned a smart card, which is being personalized by some parameters and provide the legal users to use the resources of the remote system.

What are the 3 methods of authentication?

Authentication factors can be classified into three groups: something you know: a password or personal identification number (PIN); something you have: a token, such as bank card; something you are: biometrics, such as fingerprints and voice recognition.

What are the 6 methods available for user authentication?

The list below reviews some common authentication methods used to secure modern systems.Password-based authentication. Passwords are the most common methods of authentication. ... Multi-factor authentication. ... Certificate-based authentication. ... Biometric authentication. ... Token-based authentication.

Is LDAP modern authentication?

It's not an authentication protocol. LDAP authentication typically refers to the part of the protocol (binding) that is meant to establish who you are in order to determine what privileges you have to the information in the directory. Over time, it's become a de facto authentication service.

What is the most common form of authentication?

Password - The use of a user name and password provides the most common form of authentication. You enter your name and password when prompted by the computer. It checks the pair against a secure file to confirm.

What are two types of authentication?

What are the types of authentication?Single-Factor/Primary Authentication. ... Two-Factor Authentication (2FA) ... Single Sign-On (SSO) ... Multi-Factor Authentication (MFA) ... Password Authentication Protocol (PAP) ... Challenge Handshake Authentication Protocol (CHAP) ... Extensible Authentication Protocol (EAP)

How many types of authentication are there?

There are three basic types of authentication. The first is knowledge-based — something like a password or PIN code that only the identified user would know. The second is property-based, meaning the user possesses an access card, key, key fob or authorized device unique to them. The third is biologically based.

Which authentication protocol should be used for smart card authentication?

The Smart Card and the CAD use an mutual active authentication protocol to identify each other. The card generates a random number and sends it to the CAD, which encrypt the number with a shared encryption key before returning it to the card. The card then compares the returned result with its own encryption.

What cryptographic methods can be used in securing remote work setups?

Virtual Private Network Usually, there are two choices when using VPNs: IP Security (IPsec) or Secure Sockets Layer (SSL). IPsec VPNs are manually installed and configured on the remote device.

What is the purpose of radius?

RADIUS (Remote Authentication Dial-In User Service) is a client-server protocol and software that enables remote access servers to communicate with a central server to authenticate dial-in users and authorize their access to the requested system or service.

Which protocol should you configure on a remote access server to authenticate remote users with smart cards?

EAP-TLS is the only authentication method supported when smart cards are used for remote authentication.

What is remote access protocol?

A remote access protocol is responsible for managing the connection between a remote access server and a remote computer. It’s necessary for desktop sharing and remote access for help desk activities. The primary remote access protocols in use today are the Serial Line Internet Protocol (SLIP), Point-to-Point Protocol (PPP), ...

What is PPP protocol?

PPP is a remote access protocol that allows you to implement TCP/IP. It establishes a connection via point-to-point links (i.e., dedicated leased lines and dial-up). PPP is used most often for remote connections to LANs and ISPs. PPP utilizes the Link Control Protocol (LCP), which tests the link between client and PPP host ...

How to use PPTP?

To use PPTP, you’ll have to set up a PPP session between the server and the client, usually over the internet. Once the session is established, you’ll create a second dial-up session. This dial-up session will use PPTP to dial through the existing PPP session.

What is PPTP in a network?

PPTP is a remote access protocol, based on PPP, created by Microsoft. It’s used to establish virtual connections across the internet via PPP and TCP/IP, enabling two networks to use the internet as their WAN link while retaining the security benefits of a private network.

What is managed services provider?

As a managed services provider (MSP), you likely already work with remote access protocols on a daily basis. But learning how to best explain the various types of remote access protocols and their advantages and disadvantages to customers is critical in helping them understand your decisions—and why they should trust you and your services.

Can you use a RAS modem on a Windows server?

With a RAS setup, you can connect a modem to a Windows 2000 or Windows NT server and configure the modem as dial-out only, dial-up only, or a combination of the two. RAS can only provide LAN access to remote users. It doesn’t let LAN users use the modem to, for example, dial their AOL account.

Is RDP the same as ICA?

RDP offers the same core functions as ICA, although there are some limitations. RDP provides remote access for Windows clients only, while ICA can provide access for numerous platforms. ICA also offers support for automatic client updates, publishing an app to a web browser, and more.

What is remote access authentication protocol?

A remote access authentication protocol is the method by which remote users will be authenticated when they log on the network. One (unwise) choice is to allow users to log on without authentication.

What is EAP authentication?

EAP allows for authentication of a remote access connection through the use of authentication schemes, known as EAP types. EAP offers the strongest security by providing the most flexibility in authentication variations. EAP can support authentication mechanisms, such as token cards, smart cards, certificates, and public key encryption authentication.

What is remote access server?

Remote access servers can be configured as dial-in servers or VPN servers. Dial-in servers use the Point-to-Point Protocol (PPP) or in the case of some older servers, the Serial Line Internet Protocol (SLIP) as the link layer protocol. VPN servers can use the Point-to-Point Tunneling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP), or IPSec tunnel mode to establish a secure "tunnel" over the Internet. Windows remote access servers support the following set of authentication methods: 1 Password Authentication Protocol (PAP) 2 Challenge Handshake Authentication Protocol (CHAP) 3 Microsoft's implementation of CHAP (MS-CHAP) 4 Updated version of MS-CHAP (MS-CHAP2) 5 Extensible Authentication Protocol/Transport Layer Security (EAP/TLS)

What does authenticator do?

The authenticator also calculates the hash value and compares the client's response with its own calculation. If the values match, the connection is established.

Why is PAP not supported?

For security purposes, PAP can be excluded as a viable option for most businesses because it sends passwords across the phone line or Internet in plain text. The only reason to use PAP is if the remote access client and remote access server are not able to negotiate a more secure authentication method. Many VPN/firewall products do not support PAP because of the security issue.

What is EAP TLS?

EAP/TLS provides for use of more secure authentication methods such as smart cards, Kerberos, and digital certificates, which are much more secure than the user name/password authentication methods above. It's defined in RFC 2716.

What is the protocol used for dial in VPN?

Dial-in servers use the Point-to-Point Protocol (PPP) or in the case of some older servers, the Serial Line Internet Protocol (SLIP) as the link layer protocol. VPN servers can use the Point-to-Point Tunneling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP), or IPSec tunnel mode to establish a secure "tunnel" over the Internet. ...

Why doesn't my VPN support PAP?

Many VPN/firewall products do not support PAP because of the security issue. Tips in your inbox. TechRepublic's free Strategies that Scale newsletter, delivered each Tuesday, covers topics such as how to structure purchasing, when to outsource, negotiating software licensing or SLAs, and budgeting for growth.

What is a RADIUS authorization?

Authorization refers to granting specific services to users based on their authenticated identity; restrictions can be imposed on certain users. Accounting refers to tracking the use of the network by users and can be done for billing, management, or security purposes. RADIUS is defined in RFCs 2865 and 2866.

What is remote authentication dial in user service?

One of the solutions that was designed to accommodate the remote worker is that of RADIUS. Remote Authentication Dial-In User Service is what the acronym actually stands for. It is actually fairly descriptive as that is pretty much what it is used for. The worker will remotely authenticate for access to that remote network. I have previously mentioned that I like to map protocols before to the OSI Reference Model. This helps one visualize just what protocols belong where in the grand scheme of things. In the OSI model RADIUS fits into the application layer. This protocol is no exception either to the client/server model. A client will log into the RADIUS server and supply the required credentials. Also RADIUS uses UDP as a transport protocol to ferry about its information.

What is the RFC 2138?

The devil is always in the details, and if you want details it is always best to go to the definitive source. In our case that would be RFC 2138 which deals with RADI US itself and contains all of the details about it. Seen as most people break out into hives if they think of reading an RFC I will summarize a few important details for you. One of the biggest things to realize about RADIUS is that it will support various authentication methods. Notably, you can use PPP, PAP, and CHAP to name most of them. If you are familiar with Cisco gear or are in charge of supporting the routers and switches from them, then you are no doubt familiar with the various authentication methods offered by RADIUS.

What is a tacs?

Terminal Access Controller Access Control System or TACACS is similar to RADIUS and is used to regulate access to the network. One of the biggest differences between TACACS and RADIUS is that TACACS primarily uses TCP for its transport protocol needs vice the UDP that RADIUS will use. There are also three versions of TACACS with TACACS+ being the most recent. It is important to note that TACACS+ is not backwards compatible with the other earlier versions. This protocol is also an application layer protocol and observes the client/server model. Seen as TACACS+ is also a well known protocol it stands to reason that there is also a well known port associated with this activity, which is TCP port 49. That being said XTACACS does use UDP. There is always the exception to the rule!

What port does RADIUS use?

Also RADIUS uses UDPas a transport protocol to ferry about its information. Like many well known protocols RADIUS has some well known ports that it is normally configured to be listening on. They are port 1812 and port 1813with port 1813 being used for RADIUS accounting.

What is an access challenge?

Access-Challenge: where the server sends a challenge and the user must respond.

What port does XTACACS use?

This protocol is also an application layer protocol and observes the client/server model. Since TACACS+ is also a well known protocol, it stands to reason that there is also a well known port associated with this activity, which is TCP Port 49. That being said, XTACACS uses UDP. There is always the exception to the rule!

What is a tacs?

Terminal Access Controller Access Control System , or TACACS, is similar to RADIUS and is used to regulate access to the network. One of the biggest differences between TACACS and RADIUS is that TACACS primarily uses TCP for its transport protocol needs vs. the UDP that RADIUS will use. There are also three versions of TACACS with TACACS+ being the most recent. It is important to note that TACACS+ is not backwards compatible with the other earlier versions. This protocol is also an application layer protocol and observes the client/server model. Since TACACS+ is also a well known protocol, it stands to reason that there is also a well known port associated with this activity, which is TCP Port 49. That being said, XTACACS uses UDP. There is always the exception to the rule!

What port is used for a rudius?

Like many well-known protocols, RADIUS has some well-known ports that it is normally configured to be listening on. They are Port 1812 and Port 1813, which is used for RADIUS accounting.

How does telecommuting affect morale?

The problem is that these workers must also be able to communicate with the corporate network both remotely and securely . It is of little surprise that these concerns have been addressed in a variety of ways that all work quite well.

Can you use PPP on a Radius router?

Notably, you can use PPP, PAP, and CHAP to name most of them. If you are familiar with Cisco Systems gear or are in charge of supporting the routers and switches from them, then you are no doubt familiar with the various authentication methods offered by RADIUS.

Can you use PPP and PAP?

Notably, you can use PPP, PAP, and CHAP to name most of them . If you are familiar with Cisco Systems gear or are in charge of supporting the routers and switches from them, then you are no doubt familiar with the various authentication methods offered by RADIUS.

What is Kerberos protocol?

It is designed for executing strong authentication while reporting to applications . The overall implementation of the Kerberos protocol is openly available by MIT and is used in many mass-produced products.

Why is it not possible to differentiate between protocols?

Differentiating between the protocols will not make justice to the protocols because it depends on the use of the application and for what purpose it is being used.

Do directory servers need LDAP?

The directory servers are required to be LDAP obedient for deployment.

Is a syslog a good mechanism for providing multiple access for Admins?

It is a great mechanism for providing multiple access for Admins.

Is a syslog vulnerable?

It is vulnerable to manage different sets of code.

Is authentication key shared?

The authentication key is shared much efficiently than public sharing.

Legacy authentication protocols

The following table presents authentication Azure AD integration with legacy authentication protocols and their capabilities. Select the name of an authentication protocol to see

Synchronization patterns

The following table presents Azure AD integration with synchronization patterns and their capabilities. Select the name of a pattern to see

Serial Line Internet Protocol (Slip)`

Point-To-Point Protocol

Point-To-Point Tunneling Protocol

• PPTP is a remote access protocol, based on PPP, created by Microsoft. It’s used to establish virtual connections across the internet via PPP and TCP/IP, enabling two networks to use the internet as their WAN link while retaining the security benefits of a private network. PPTP is a great option because it’s simple and secure. To use PPTP, you’ll ha...

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Windows Remote Access Services

Remote Desktop Protocol