I tried to use cascade of WMS from this portal in order to cache wms layers
Native for this portal is EPSG:3765, but EPSG:31275 is also supported But while direct access to WMS returns correct result:
cascaded WMS with exactly the same parameters returns all-white image. And in documentation of Geoserver it says that while cascading if the requested projection exists on remote server it will serve it from remote server, otherwise it will reproject it.
What could be going wrong, why isn't geoserver just returning correct image from remote service?
Geoserver version used is 2.2.