[imp] SERVER_NAME vs. HTTP_HOST

[Dr. Lars Hanke]

I built a Horde server in my DMZ. I can be reached via an internal name 
and via an external name. The internal name cannot be resolved outside 
of my LAN. The external name causes a quite looped route. So it would be 
nice, if Horde produced links and redirects to the host name in the 
original request.

However, what happens is that Horde seems to use SERVER_NAME instead of 
HTTP_HOST. This currently causes horde to return an internal address, 
which makes the server unavailable from outside.

Is there any way to solve it beyond using another virtual host for 
external access?

Any help appreciated,

  - lars.