Unable to authenticate MS AD users for SSL VPN Connection 5

Hi there,
My NGAF SSLVPN is working perfect with users present in local DB of NGAF, also imported MS Active Directory Users successfully. while trying to connect VPN via MS AD user, Easy Connect always gives error "username or password is incorrect" seems it is unable to authenticate via AD. My AD is authenticating users for other purposes within LAN only VPN users are having issues.

Is there any recommendation or prerequisite configuration needs to be done on Active Directory side or may be on NGAF site.

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To resolve MS AD user authentication issues for SSL VPN connections, ensure the VPN appliance is correctly configured to communicate with the AD server, verify RADIUS or LDAP settings, and check user group policies. Confirm the SSL certificate is valid and trusted. Test connectivity between the VPN and AD server.
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It sounds like you're dealing with a common issue where the NGAF SSL VPN isn't properly authenticating Microsoft Active Directory (AD) users. Here's a detailed guide to help you resolve this problem:

1. Verify AD Integration:
LDAP Configuration: Double-check the LDAP settings on your NGAF. Ensure that you’ve correctly entered the AD server's domain name, IP address, and port. Most commonly, LDAP uses port 389, and LDAPS (secure LDAP) uses port 636.
Binding Test: Perform an LDAP bind test to ensure that the NGAF can connect to the AD server and successfully search for users.
2. User Attribute Validation:
Active Accounts: Ensure that the AD accounts are active, not locked out, and that passwords haven’t expired. AD authentication can fail if the user’s password is expired or if the account is locked.
Correct Group Membership: If your VPN setup uses AD group membership to authorize users, ensure the users are part of the correct groups within AD.
3. NGAF SSL VPN Configuration:
Authentication Method: Confirm that the NGAF is set up to use AD/LDAP for authenticating VPN users, not just the local database.
Certificate Trust: If using LDAPS, verify that the NGAF trusts the certificate provided by the AD server. Issues here often cause authentication to fail.
4. Logs and Troubleshooting:
Check Logs: Both the NGAF and AD logs will provide clues. On the NGAF, look for LDAP-related errors or warnings. On the AD server, check for any failed login attempts or LDAP errors.
Firewall and Network Configuration: Ensure there are no firewall rules or network configurations blocking the LDAP ports (389/636) between NGAF and the AD server.
5. Consider External Resources:
If after following these steps you're still facing issues, you might want to explore further or even look into professional services that specialize in network security and Active Directory integration. Sometimes, the solution lies in subtle misconfigurations that require a deeper dive.

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No necessary Active Directory configuration is required. Simply verify the WAN Links and attempt to delete and recreate the user.

If you are trying to authenticate an AD user to  <a href="https://framedgame.io/">framed game</a> a VPN server, and the user's account is not in Active Directory, then it will be impossible for them to authenticate with the server.

We have seen a lot of issues when using SSL VPN among us connections with Windows Active Directory (AD) users. One of the most common issues is that the AD user doesn’t get prompted for their password or gets prompted for an incorrect password.