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oauth server generated jwt token problem


Hi all,

We have a customer try to do oauth with a dovecot server, they have the following problems using the f5 as a oauth server:


  1. The "typ" jwt header is missing, this should be set to "JWT".
  2. F5 set the JWT token nbf (not valid before) to some minutes in the past, this breaks dovecot auth.
  3. Customer want to use the following oauth features, are these supported?


Do you know how the above could be customized in f5 to set to values the dovecot would accept?


Thank you for any hint.




use token_content_type with value jwt in post data while retrieving token via /f5-oauth2/v1/token


Unfortunately the customer changed the IdP now to Keycloak and this seems to fix all problems he had with the OAuth.

The above is not the only one limitation F5 OAuth has, it would be great if F5 could be more customizable into this.

I had a ticket open, also for the other customer problems, the only solution was a Feature Request without any timeline given when it would be implemented.

Hello Peter,


I have exactly the same problem as you for another application.

The "typ" jwt header is missing, this should be set to "JWT".


have you had any feedback from the support? if not, could you give me the number of your incident? it will have weight if I open an incident about it.


thank you for your help.




You need to specify token_content_type with value jwt for JWT tokens to be provided by F5 oauth server via POST method to /f5-oauth2/v1/token, if you dont do that then you request Opaque token.


Also first is always a GET request to /f5-oauth2/v1/authorize where I also append &token_content_type=jwt

Hi Marvin,

Can you confirm if the &token_content_type=jwt paramenter is added to the request the follwoing is added "type":"JWT" in the header of the JWT i.e.

"alg": "HS256",
"typ": "JWT"

Currently the F5 is configured to issues JWT automatically, but it missing the "type":"JWT" in the header of the JWT. It doesn't required the special parameter to issue the JWT in the current setup.

Or found another way to add headers to JWT.

Running 15.1.x and the F5 is acting the the Oauth Authorization Server.