Disable keepalive for proxies

Question

Can I disable keepalive if my site is being accessed through a proxy?

Site is served by nginx on linux, some dynamic parts are proxied to local Apache.

If not possible for all proxies in general, can I do that for specific IP address?

So far I did this:

location / {
    root /var/www;
    if ($remote_addr = 127.0.0.1) {
        rewrite ^(.*) /no-keep-alive/$1 last;
    }
}

location ^~ /no-keep-alive/ {
    # you'll have to create a sym link here so that root will be the same
    root /var/www/no-keep-alive;
    keepalive_timeout 0;
}