The homepage is hosted at a hosting company, not behind the Sophos UTM.
I know in meantime that the problem is caused by the webfilter. Turning the webfilter off makes it work. But of course I don't want to turn it off.
There are two protocol entries.
2014:10:20-13:21:38 mysophos httpproxy[5555]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xe26a9238" function="read_response_headers" file="response.c" line="463" message="received invalid header from server: [Content-Length: 9365\n\n]"
2014:10:20-13:21:38 mysophos httpproxy[5555]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="GET" srcip="my internal ip" dstip="homepage IP at hoster" user="" ad_domain="" statuscode="502" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="2884" request="0xe26a9238" url="my external domain/.../downloadDocument.php
Can you give me a hint about what the problem could be and how I can set an exception?
Thanks
Roger
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