Forum Discussion
tub91
Cirrus
CirrusClient Authentication with certificate on one URI only
Hello, I need your help figuring out how to troubleshoot a new implementation. We have a VIP exhibiting our service. The VIP has its own SSL client profile. Behind this VIP is an IIS which has 5 we...
Just to quickly follow up on this question, the answer depends on when. From an OSI perspective, by the time you've reached the HTTP uri, the TLS handshake is already done, so you really don't have any other option but to perform renegotiation. Since the client and BIG-IP have already established a TLS session (without cert auth), you basically have to tell the client to start a new TLS handshake, while you flip on the cert auth option. Even APM does this for things like On-Demand Cert Auth, that happen after initial TLS handshake and after the access policy has started.
If you can get to the data you're looking for before the TLS handshake finishes, like looking at the SNI in the layer 4 TCP payload, then it would be possible to switch client SSL profiles (between auth and non-auth SSL profiles).
tub91Cirrus
CirrusHi mihaic
Thank you for your answer. However, we would like to avoid using SSL Renegotiation.
Is there any way to do this through the APM?
Kevin_Stewart
Employee
EmployeeJust to quickly follow up on this question, the answer depends on when. From an OSI perspective, by the time you've reached the HTTP uri, the TLS handshake is already done, so you really don't have any other option but to perform renegotiation. Since the client and BIG-IP have already established a TLS session (without cert auth), you basically have to tell the client to start a new TLS handshake, while you flip on the cert auth option. Even APM does this for things like On-Demand Cert Auth, that happen after initial TLS handshake and after the access policy has started.
If you can get to the data you're looking for before the TLS handshake finishes, like looking at the SNI in the layer 4 TCP payload, then it would be possible to switch client SSL profiles (between auth and non-auth SSL profiles).