Created attachment 38933 [details] relativ action url in edit form The balancer-manager generates an absolute URL for the edit function to modify the parameters of a selected worker. This leads to problems for me when the Apache with the balancer itself is placed behind a reverse-proxy. With an adjustment in the source code, I was able to solve the problem for myself. The action in the (edit) form is now delivered with a relative URL (without scheme and host).