Re: Meraki AnyConnect Certificate Validation Error (2024)

Re: Meraki AnyConnect Certificate Validation Error (1)

rhamersley

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Meraki AnyConnect Certificate Validation Error

In our environment we have certificate validation authentication enabled. We have random users receiving "Certificate Validation Error" messages about once a week in our environment. We have about 75 users VPN into our network and why would a random user receive this error message. If one user cannot authenticate using the cert wouldn't if affect all users trying to VPN into our network?

Re: Meraki AnyConnect Certificate Validation Error (2)

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Re: Meraki AnyConnect Certificate Validation Error (3)

Re: Meraki AnyConnect Certificate Validation Error (4)alemabrahao

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Open a support case. They will assist you.

I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

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Re: Meraki AnyConnect Certificate Validation Error (5)

Re: Meraki AnyConnect Certificate Validation Error (6)alemabrahao

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Also check these links.

AnyConnect Troubleshooting Guide - Cisco Meraki Documentation

https://documentation.meraki.com/MX/Client_VPN/AnyConnect_on_the_MX_Appliance/Managing_and_Troublesh...

I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

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Re: Meraki AnyConnect Certificate Validation Error (7)

rhamersley

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I would like to see if this Certificate Authentication Error message has been encountered in other environments and what other users have done to fix this issue.

I know I could do the following:

* Disable the certificate authentication altogether and the user will successfully VPN into the network but that doesnt actually tell me why this only affected one user and not every user that has to perform the certificate authentication method.

User has rebooted device multiple times to see if it was a certificate service issue on the users laptop, but that was not the issue either.

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Re: Meraki AnyConnect Certificate Validation Error (8)

Re: Meraki AnyConnect Certificate Validation Error (9)alemabrahao

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Check the links I sent you, there you will find the troubleshooting steps.

I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

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Re: Meraki AnyConnect Certificate Validation Error (10)

Re: Meraki AnyConnect Certificate Validation Error (11)PhilipDAth

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I have seen this when a client has multiple certificates installed, and AnYConnect is not sure which one to select.

You might need to create a profile with a certificate selection rule. I typically match on the issuing CA.

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Re: Meraki AnyConnect Certificate Validation Error (12)

rhamersley

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Philip!...I like this idea....I do have one question will it automatically match the cert by updating the XML profile or will it show a cert as a pop up and the user will need to select the correct cert to complete the authentication.

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Re: Meraki AnyConnect Certificate Validation Error (13)

Re: Meraki AnyConnect Certificate Validation Error (14)PhilipDAth

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The user will get no prompts (they only get prompts if you disable automatic certificate selection).

Lucky for you, I had to do such a deployment yesterday. The important bit in the profile XML is:

<?xml version="1.0" encoding="UTF-8"?><AnyConnectProfile xmlns="http://schemas.xmlsoap.org/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://schemas.xmlsoap.org/encoding/AnyConnectProfile.xsd"><ClientInitialization><CertificateMatch><KeyUsage> <MatchKey>Key_Encipherment</MatchKey> <MatchKey>Digital_Signature</MatchKey></KeyUsage> <ExtendedKeyUsage> <ExtendedMatchKey>ClientAuth</ExtendedMatchKey> </ExtendedKeyUsage> <DistinguishedName> <DistinguishedNameDefinition Operator="Equal" Wildcard="Disabled" MatchCase="Disabled"> <Name>ISSUER-CN</Name> <Pattern> *** any bit of the text from the name of your CA *** </Pattern> </DistinguishedNameDefinition> </DistinguishedName></CertificateMatch></ClientInitialization><ServerList>...</ServerList></AnyConnectProfile>

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In response to PhilipDAth

Re: Meraki AnyConnect Certificate Validation Error (15)

rhamersley

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Philip! Thank you So much for this information. Yes I do not want to prompt the user for anything. We had another CERT AUTHENTICATION failure today.

If I could quickly confirm with you. The CERTIFICATE(.PEM File) I have uploaded into the Meraki Dashboard here.

Re: Meraki AnyConnect Certificate Validation Error (16)

Since this is the first time updating our XML profile could you confirm the setting.

Open XML Profile editor...

Gone to Certificate Pinning

Imported my certificate here

Is that correct?

Re: Meraki AnyConnect Certificate Validation Error (17)

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Re: Meraki AnyConnect Certificate Validation Error (18)

rhamersley

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Looks like "Pinning" the Cert to the XML file does not work. Received this error message while testing.

Re: Meraki AnyConnect Certificate Validation Error (19)

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Re: Meraki AnyConnect Certificate Validation Error (20)

rhamersley

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Philip....What do you mean "Any bit of the text from the name of your CA ***???

Re: Meraki AnyConnect Certificate Validation Error (21)

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Re: Meraki AnyConnect Certificate Validation Error (22)

rhamersley

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This is what I currently have...the name of our certificate issuer.

Re: Meraki AnyConnect Certificate Validation Error (23)

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Re: Meraki AnyConnect Certificate Validation Error (24)

rhamersley

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It WORKED PHILIP!!!

I do have a question how do we know it is actually reading the CERT from the workstation? We have the CERT authentication enabled in the Meraki Dashboard but is there anyway we can confirm its still reading the CERT?

Below is my configuration that I was able to successfully VPN into our network with the CERT authentication option enabled in the Meraki Dashboard.

Re: Meraki AnyConnect Certificate Validation Error (25)

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Re: Meraki AnyConnect Certificate Validation Error (26)

Re: Meraki AnyConnect Certificate Validation Error (27)PhilipDAth

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10 hours ago

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Well done!

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Re: Meraki AnyConnect Certificate Validation Error (28)

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Re: Meraki AnyConnect Certificate Validation Error (2024)

FAQs

How do I fix VPN certificate validation failure? ›

This can be solved by reconnecting to the VPN, restarting your router, or temporarily disabling your firewall. You should also make sure your VPN provider is compatible with your chosen network, such as Firefox. An expired certificate is the most common reason for a VPN certificate validation failure.

What does certificate validation error mean? ›

If the web administrator has not correctly installed intermediate certificates on their server, the browser will be unable to validate the SSL/TLS certificate. Another common reason for a certificate validation error is that the user has issued a self-signed certificate using their own software.

How to check AnyConnect certificate? ›

Verify that there is a certificate that was signed by the Trusted CA uploaded to the MX in the Personal > Certificates folder of the device attempting to connect.

How do I fix validation errors? ›

Validation error reference. You must set up the start rules for the program. Select the error to highlight the Start node, then select the Start node to enter the start rules for the program. All programs must include at least one action.

What does certificate error mean on VPN? ›

Either the certificate being presented by the firewall isn't trusted by the machine that's trying to connect to the VPN (meaning you are missing at least one of the following in the local machine cert store: root, intermediate, or issuer.) Option 2 is the certificate is expired and inherently will be untrusted.

Where is the VPN certificate stored? ›

Certificates created for VPN gateways for establishing the VPN are stored on the VPN gateway devices (Firewalls). These certificates are not included in the Management Server backup, and are not changed in any way when a Management Server backup is restored.

How to get a Cisco VPN certificate? ›

Navigate to Configuration > Remote Access VPN > Certificate Management , and choose CA Certificates. The PEM encoded certificate in a text editor and copy and paste the base64 CA certificate provided by the third-party vendor into the text field. Click Install certificate.

How do I check my Cisco certification status? ›

Log in to the Cisco Certification Tracking System: http://cisco.com/go/certifications/login. *Note: The In Progress status does not apply to CCIE certifications. You can also click Show All Certifications in the top right corner of the screen to see other available Cisco programs that you are not currently enrolled in.

How do I turn off certificate validation on the client? ›

To disable certificate verification, the best option in most cases is to use an X509ExtendedTrustManager extension that doesn't do any verification, as this will bypass both certificate path and hostname verifications and will only apply to the specified client.

How do I fix authentication failed on VPN? ›

To resolve, ensure to use the correct username with a user-locked profile. You can't mix and match profiles and credentials. Alternatively, you can replace the user-locked profile with a server-locked connection profile if you need a connection profile that allows any valid Access Server user to connect.

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