Enable transparent use in bridged mode
I have a new client that's a hosting facility. At present, there are hundreds of websites with existing IPs, DNS entries, etc. It's not practical to protect these existing sites because of the requirement that a Virtual Server use an IP on the arriving interface.
We attempted to go around this by running all of the traffic to a test server through the UTM in bridged mode. We tried using a DNAT to direct the traffic back to the bridged interface with the address of the bridge. This didn't work because the REDIRECT capability isn't configurable in WebAdmin (per Development).
Bob Alfson commented
A possible solution also is suggested here: http://feature.astaro.com/forums/17359-utm-formerly-asg-feature-requests/suggestions/3344404-enable-redirect-for-dnats