Add domain to end of server name

[SQLWilts]

Hi,
I have an issue where a number of reports dont work when you press the back or forward button on your browser. I have found that it is because the browser thinks that it is in the internet zone.
I cannot add the server as a trusted site, as our system is tied down.
A way round it is to add the domain suffix to the report server address:
so it is like this now:

http://server/reports/pages............

If I type in:

http://server.domain.net/reports/pages.......

it works.

My question is this:
Is there anyway to force the server to always add the .domain.net to the address?

thanks in advance