Think of nginx as a transparent proxy/frontend - so instead of giving
proxy_set_header Host 192.168.1.1; you should set the real hostname of the
site proxy_set_header Host yoursite.com; (you can also use $host variable if
there are multiple/dynamic domains).

upstream mysites_hash {
ip_hash;
server 192.168.1.1;
server 192.168.1.2;
}

location /csupdate {
proxy_pass http://mysites_hash/csupdate;
proxy_set_header Host www.mydomain.com;
}

That way the backends/application should use full domain (the one you pass
in the header) in the redirects which will go through your nginx frontend
without the need of extra proxy_redirect directives.


rr


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