TID 3988333 says:

skipAuthForViaHeader=1 (0 to disable)(Default=0)
// Authentication to proxy bypassed when coming through another proxy.This setting must be configured in the proxy.cfg file to enable proxy to skip the authentication when the request is coming through another proxy.By default, proxy will request for authentication.


This means to me that if I don't want authentication skipped if the NBM proxy is accessed by another proxy, then I would want this set to 0.


Craig, in his Proxy.cfg says:
; New parameter from BM3.9SP1
; =1 prevents authentication from being bypassed when proxy accessed
; from another proxy. (Schools, take note!)
skipAuthForViaHeader=1


I read Craig's note as meaning that if I don't want authentication skipped if the NBM proxy is accessed by another proxy, then I would want this set to 1.

Which is correct?

Dan