Is either of the two using an url rewriter / redirector helper? (url_rewrite_program/redirector_program, same directive different names)
Yes, the internal proxy uses squidguard to filter for forbidden urls.I just tried to disable the redirection to squidguard and now it works. So the problem seems to be the squidguard configuration.
I just googled a little bit, but could not find someone with similar problems. Do you maybe have an idea how to solve this?
regards, Daniel