Authentication and Authorization for Remote Access
| Type | Description | Where to Find Information |
| LDAP and NIS+ | The LDAP directory service and the NIS+ ... | System Administration Guide: Naming and ... |
| Remote login commands | The remote login commands enable users t ... | “Accessing Remote Systems (Tasks)” in Sy ... |
| Secure RPC | Secure RPC improves the security of netw ... | Overview of Secure RPC |
| Secure RPC can also be used to provide a ... | NFS Services and Secure RPC |
Full Answer
What is used by remote access protocols for authentication?
Authentication is the process of proving identity. Common protocols used for remote access authentication include PAP, CHAP, MS-CHAP, or EAP. Usernames and passwords are used during identification and authentication as authentication credentials. SLIP and PPP are remote access connection protocols that are used to establish and negotiate ...
How to setup remote access?
Once installed, you can now connect to remote endpoints by following the steps below:
- The software needs to be downloaded on both the local and remote computers.
- Open the software on both the local and remote computers.
- Write down the ITarian ID number and password of the remote computer.
- Click “Start Connection.”
- Enter the ID number and password of the remote computer.
- Click “Connect.”
How to protect remote access?
To enable Remote Access in your UniFi Protect application:
- Access the UniFi OS Console hosting Protect via its IP address. ...
- Log in to your Ubiquiti SSO account.
- Go to the System Settings > Advanced menu, and enable the Remote Access toggle.
How to authenticate remote users?
Using a personal authentication token or password Using an SSH key Using your GitHub password with 2-factor authentication; With either of the first two approaches you can avoid entering a username and password each time you interact with the remote repository, as discussed below.
What is remote user authentication?
Remote user authentication is a mechanism in which the remote server verifies the legitimacy of a user over an insecure communication 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.
Which 2 methods of authentication can be used for remote access connections?
remote access servers support the following set of authentication methods:Password. Authentication Protocol (PAP)Challenge. Handshake Authentication Protocol (CHAP)Microsoft's. implementation of CHAP (MS-CHAP)Updated. version of MS-CHAP (MS-CHAP2)Extensible. Authentication Protocol/Transport Layer Security (EAP/TLS)
What are 4 methods of authentication?
The most common authentication methods are Password Authentication Protocol (PAP), Authentication Token, Symmetric-Key Authentication, and Biometric Authentication.
Why is remote authentication important?
MFA is important for remote workers for not only preventing unauthorized access, but in improving your organization's overall security posture. This is thanks to one of the great features of MFA: when an attempt is made to get into someone's account from an unauthorized device, the user will get a notification.
What is secure remote access?
Secure Remote Access is a combination of security processes or solutions that are designed to prevent unauthorized access to an organization's digital assets and prevent the loss of sensitive data.
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.
What are different authentication methods?
Common types of biometrics include the following: Fingerprint scanning verifies authentication based on a user's fingerprints. Facial recognition uses the person's facial characteristics for verification. Iris recognition scans the user's eye with infrared to compare patterns against a saved profile.
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.
What is an example of authentication?
In computing, authentication is the process of verifying the identity of a person or device. A common example is entering a username and password when you log in to a website.
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.
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 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.
What is a remote authentication dial in user service?
The remote authentication dial in user service (RADIUS) protocol is a third-party authentication system. RADIUS is described in RFCs 2865 and 2866, and it uses the UDP ports 1812 (authentication) and 1813 (accounting). RADIUS formerly used the unofficially assigned ports of 1645 and 1646 for the same respective purposes, and some implementations continue to use those ports.
What is the purpose of the Radius system?
RADIUS is considered an “AAA” system, comprised of three components: authentication, authorization, and accounting. It authenticates a subject's credentials against an authentication database. It authorizes users by allowing specific users' access to specific data objects.
What port does RADIUS use?
RADIUS is described in RFCs 2865 and 2866, and uses the User Datagram Protocol (UDP) ports 1812 ( authentication) and 1813 (accounting). RADIUS formerly used the (unofficially assigned) ports of 1645 and 1646 for the same respective purposes; some implementations continue to use those ports.
What is NPS in Windows Server 2008?
For Windows Server 2008, Microsoft has replaced IAS with a new feature called NPS. NPS is the Microsoft implementation of a RADIUS server and proxy in Windows Server 2008, and promises to be even simpler to use than IAS. You will need to know how to set up a RADIUS server using NPS.
What is a dial in user service?
Remote Authentication Dial-In User Service (RADIUS) is a protocol that originally was created for dial-in authentication and authorization service. Now, its role has expanded to include wireless access point access, authenticating Ethernet switches, virtual private network servers, and more. In Windows Server 2008, the RADIUS function is now handled by the Network Policy and Access Services role.
What is domain in Active Directory?
Microsoft Windows Active Directory uses the concept of domains as the primary means to control access. For authentication purposes, Microsoft bases their authentication of trust relationships on RFC 1510, the Kerberos Authentication Protocol, and it has been integrated into Microsoft Windows operating systems since Windows 2000. Each domain has a separate authentication process and space. Each domain may contain different users and different network assets and data objects. Because Microsoft Windows also uses the concept of groups to control access by users to data objects, each group may be granted access to various domains within the system. If a two-way trust between domains is created, then groups belonging to either domain may access data objects from each domain.
What is a PAP server?
The Password Authentication Protocol (PAP) is defined by RFC 1334 ( http://tools.ietf.org/html/rfc1334#section-2) and is referred to as being, “not a strong authentication method.” [17] A user enters a password and it is sent across the network in clear text. When received by the PAP server, it is authenticated and validated. Sniffing the network may disclose the plaintext passwords. Sniffing refers to monitoring network communications and capturing the raw TCP/IP traffic.
What is an OTP server?
An OTP server that supports PAP over RADIUS.
What is a RRAS?
1. DirectAccess and Routing and Remote Access Services (RRAS) VPN-DirectAccess and VPN are managed together in the Remote Access Management console. 2. RRAS Routing-RRAS routing features are managed in the legacy Routing and Remote Access console. The Remote Access role is dependent on the following server features:
What is OTP planning?
In addition to the planning required for a single server, OTP requires planning for a Microsoft certification authority (CA) and certificate templates for OTP; and a RADIUS-enabled OTP server. Planning might also include a requirement for security groups to exempt specific users from strong (OTP or smart card) authentication.
How to remotely access a PC?
On the device you want to connect to, select Start and then click the Settings icon on the left. Select the System group followed by the Remote Desktop item. Use the slider to enable Remote Desktop.
How to remotely connect to Windows 10?
Windows 10 Fall Creator Update (1709) or later 1 On the device you want to connect to, select Start and then click the Settings icon on the left. 2 Select the System group followed by the Remote Desktop item. 3 Use the slider to enable Remote Desktop. 4 It is also recommended to keep the PC awake and discoverable to facilitate connections. Click Show settings to enable. 5 As needed, add users who can connect remotely by clicking Select users that can remotely access this PC .#N#Members of the Administrators group automatically have access. 6 Make note of the name of this PC under How to connect to this PC. You'll need this to configure the clients.
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!
How does Radius work?
Typically RADIUS works as follows; Access-Request: where the user sends his credentials to the server; Access-Challenge: where the server sends a challenge and the user must respond . Based on the above access controls, the user is either authenticated or rejected.
What port is used for RADIUS?
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.
What happens every time you involve another layer or program in your network?
The bottom line is that every time you involve another layer or program in your network, you are introducing another possible attack vector. You would be well advised to go with a mature technology for your remote authentication solution.
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 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.
How to install Remote Access on DirectAccess?
On the DirectAccess server, in the Server Manager console, in the Dashboard, click Add roles and features. Click Next three times to get to the server role selection screen. On the Select Server Roles dialog, select Remote Access, and then click Next.
What group does DirectAccess belong to?
For a client computer to be provisioned to use DirectAccess, it must belong to the selected security group . After DirectAccess is configured, client computers in the security group are provisioned to receive the DirectAccess Group Policy Objects (GPOs) for remote management.
How to configure deployment type?
On the Remote Access server, open the Remote Access Management console: On the Start screen, type, type Remote Access Management Console, and then press ENTER. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Yes.
What is DirectAccess OTP?
DirectAccess OTP authentication requires a client computer certificate to establish an SSL connection with the DirectAccess server; however, the client computer certificate was not found or is not valid, for example, if the certificate expired.
Why is OTP authentication not completed?
OTP authentication cannot be completed because the computer certificate required for OTP cannot be found in local machine certificate store.
Can a client computer contact the CA that issues OTP certificates?
The user provided a valid one-time password and the DirectAccess server signed the certificate request; however, the client computer cannot contact the CA that issues OTP certificates to finish the enrollment process.
Can OTP certificates be signed on remote access?
The DirectAccess OTP signing certificate cannot be found on the Remote Access server; therefore, the user certificate request can't be signed by the Remote Access server. Either there is no signing certificate, or the signing certificate has expired and was not renewed.
Can OTP certificates be used for logon?
The CA that issues OTP certificates is not in the enterprise NTAuth store; therefore, enrolled certificates can't be used for logon. This can occur in multi domain and multiforest environments where cross domain CA trust is not established.
Is the OTP certificate one time?
The one-time password provided by the user was correct, but the issuing certification authority (CA) refused to issue the OTP logon certificate. The certificate request may not be properly signed with the correct EKU (OTP registration authority application policy), or the user does not have the "Enroll" permission on the DA OTP template.
Does a user have a UPN?
The user does not have the User Principal Name (UPN) or Distinguished Name (DN) attributes properly set in the user account, these properties are required for proper functioning of DirectAccess OTP.
Scenario Description
- In this scenario a Remote Access server with DirectAccess enabled is configured to authenticate DirectAccess client users with two-factor one-time password (OTP) authentication, in addition to standard Active Directory credentials.
Prerequisites
- Before you begin deploying this scenario, review this list for important requirements: 1. Deploy a Single DirectAccess Server with Advanced Settingsmust be deployed before you deploy OTP. 2. Windows 7 Clients must use DCA 2.0 to support OTP. 3. OTP does not support PIN change. 4. A Public Key Infrastructure must be deployed.For more information see: Test Lab Guide Mini-Mod…
in This Scenario
- The OTP authentication scenario includes a number of steps: 1. Deploy a Single DirectAccess Server with Advanced Settings. A single Remote Access server must be deployed before configuring OTP. Planning and deploying a single server includes designing and configuring a network topology, planning and deploying certificates, setting up DNS and Active...
Practical Applications
- Increase security-Using OTP increases the security of your DirectAccess deployment. A user requires OTP credentials in order to gain access to the internal network. A user supplies OTP credentials via the Workplace Connections available in the network connections on the Windows 10 or Windows 8 client computer, or by using DirectAccess Connectivity Assistant (DCA) on clie…
Hardware Requirements
- Hardware requirements for this scenario include the following: 1. A computer that meets the hardware requirements for Windows Server 2016 or Windows Server 2012. 2. In order to test the scenario, at least one computer running Windows 10, Windows 8, or Windows 7 configured as a DirectAccess client is required. 3. An OTP server that supports PAP over RADIUS. 4. An OTP har…
Software Requirements
- There are a number of requirements for this scenario: 1. Software requirements for single server deployment. For more information, see Deploy a Single DirectAccess Server with Advanced Settings. 2. In addition to software requirements for a single server there are a number of OTP-specific requirements: 2.1. CA for IPsec authentication-In an OTP deployment DirectAccess mus…
Known Issues
- The following are known issues when configuring an OTP scenario: 1. Remote Access uses a probe mechanism to verify connectivity to RADIUS-based OTP servers. In some cases this might cause an error to be issued on the OTP server. To avoid this issue, do the following on the OTP server: 1.1. Create a user account that matches the username and password configured on the …