When accessing an external URL hosted behind the ProxySG appliance in reverse proxy mode, users might receive an HTTP 404 error.
This issue occurs when forwarding is configured on the appliance, as in the following policy example:
forwarding ;mode
create host "internal_example" www.internalexample.com http=80 ssl-verify-server=no server
<Proxy>
url.domain="www.externalexample.com" Allow
<Forward>
server_url.domain="www.externalexample.com" forward("internal_example") forward.fail_open(no)