Request.getClientUrl() usage when using reverse proxy

Hi,
I've little trouble finding the correct method to use, to get the host name
when using reverse proxy. I tried to use
"org.apache.wicket.request.Request.getClientUrl()", but when I use
"Url#getHost()" on the return value, I get the actual host name instead of
the proxy url.

Is there any other method I can use in this case?

Thanks,
Rakesh.A