Hello Ali,
but the problem is that in address bar the address automatically change to http://machine1.xyz.com. so as a result we can not access to service.
Can you please attach the Web Dispatcher profiles to this thread?
Please attach the SAP backend profiles as well.
There is an option that allows you to attach a "zip" file to the thread, so you do not need to post all the content of the profiles in your reply.
Regards,
Isaías