size of auth header

[dan]

How can we determine the size of the auth header that FusionAuth is sending back to prevent our gateway from throwing a 502 Bad Gateway error?

[dan]

We do not have a current mechanism to check how big the headers will be from FusionAuth. Out of the box, FusionAuth will not set more than 1024K in headers.

Therefore, if you are seeing a 502, this suggests a proxy configuration issue or another integration issue with how you have set up your infrastructure. You could try tuning your values and proxy settings (as you have suggested).

We also have a community-contributed proxy configurations that you might find helpful: https://github.com/FusionAuth/fusionauth-contrib/tree/master/Reverse Proxy Configurations