Re: Rules

I am busy with configuring Nging reverse proxy. The goal I have is the following:

If I get the following URL I have to block it:

www.myserver.com/mypage.aspx?user=1

But the following link is allowed:

www.myserver.com/mypage.aspx?user=2

I have to reverse it to the following address:

http://internal.myserver.com/mypage.aspx?user=?

Can I use rewrite? or proxy pass and a deny?

Thank you in advance.