Working with rest behind haproxy

[joekutos]

I am trying to work with restful behind haproxy version 2.4 but i am getting the error

{"exception":"moodle_exception","errorcode":"noauthheader","message":"No Authorization header found in request sent to Moodle"}

This is probably because Haproxy is not forwarding the header to moodle!! Tried adding the header in the backend configuration but still not getting the solution

http-request set-header Authorization "HHHhdasdashdahs88832422hhththadas"

This doesnt seem to solve the issue. A solution to this would be appreciated