To enable SSL vpn on ASA5520 (ASA5520-SSL500-K9)whether its really reauired to buy a SSL Certificates from verisign or with the help of cisco SSL User License it can work ? can some one help me out please
For SSL VPN client certificate - you can use a third party certificate - The reason to use the third party certificate is so that the Root Certificate of the Certificate Authority is already pre-installed with the browser.
Eg: Verisign, Go Daddy, etc...
So - when the client connects to the ASA, the client looks at the certificate ASA sends and since the ID cert of the ASA is authorized by the third party Root, which is in the root trusted certificate of your client browser, the users don't get prompted for Certificate authentication.
So, when you use the self-signed certificate that is issued by the ASA, you would need to install the certificate issued by the ASA into the root trusted certificate field for the first time on the client browser.
And the next login attempt of the client will not prompt for certificate validation if this is done.
Anyway - its upto to the network administrator to device which one to use.
Normally it would be nice to use the third party certificate because, the users will not have to go through the process of installing the certificate assigned by the ASA in case of self-signed cert.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...