There are many reasons for CIs so many people tend to confuse them with an ‘error message’. An error message is a generic graphical representation of an issue. For example, the printer driver update failed. You may get an error message from time to time when printing a document. In such cases, it is pretty safe to presume that your hardware is either not correctly configured or there is a communication problem between the hardware and the operating system. In case of Cisco AnyConnect Certificates, the reason behind the failure is due to the central part of the system being invalid.
Some people used the Cisco AnyConnect online portal to try and validate the certificate without actually running the application. In the offline mode, you can login to the AnyConnect console and use the ‘Validate’ option. You’ll see the option ‘Automatically Validate Using DNS.’ Selecting this option will initiate the verification process. In general most people will receive a ‘Certification Success!’ message but in rare cases, you might receive a ‘Cannot Find Application.’
The reason for the’Cannot Find Application’ error in Cisco AnyConnect certificate verification is because the DNS server is not responding or locating the application that you want to accept to enable secure VPN connection. This is not the case with all AnyConnect SSL certificates. If you receive this message while installing new software on your computer, the first thing you do is to restart Cisco AnyConnect software and then re-open the VPN client. If this does not work, the next step is to check the validity of the private SSL certificate.
Some people used the Cisco AnyConnect console to manually validate the server certificate… This method doesn’t really work in most of the scenarios. When you run this method, you will end up losing all the SSL certificates that were associated with the AnyConnect VPN account. Furthermore, the command-line interface of the AnyConnect software is rather complicated. It requires some level of IT knowledge and support to be able to successfully perform the operation.
There are two different types of Cisco AnyConnect SSL certificate errors that can occur – the Verification Failure and Server Certificate Errors. The Verification Failure occurs when the response from the server is unsuccessful, while Server Certificate Errors indicate an improper choice of one of the certificates that was being associated with the AnyConnect VPN account. Both errors can be solved by troubleshooting the server or using automated tools to repair the SSL certificate errors. In most of the cases, users fix the server error by restarting the Cisco AnyConnect VPN server, while users fix the Certificate Errors by using the command-line tool to update the private SSL certificate with a different private SSL certificate.
Another common problem that is associated with Cisco AnyConnect VPN is the inability to connect to the VPN servers. While some people used to get this message when they try to access a VPN server, there are some others who get the message when they try to access the AnyWeb portal through the CCNA or CCIE AnyConnect virtual appliance. This can happen due to the failure of the server’s SSL certificate or because of lack of authorization. To resolve this type of SSL certificate error, users just need to restart the AnyConnect console and then access the command-line tool, which is able to detect the reasons for the SSL certificate verification failure and then fix it.
Most people used to think that there is no other option than to contact the CCNA or Cisco technical support to get rid of the SSL certificate verification failures. Fortunately, Cisco introduced the SSL Deep Server solution to overcome these problems. By using the Deep Server, people can access the SSL certificate authority over the VPN without having to connect to the VPN itself. Just by using the Deep Server, you can determine why the Anyconnect failed and then use it to fix it.