Django forms redirecting to internal IP on Amazon AWS

I have two sites that share the same problem, they are both hosted on Amazon EC2. The machines are Debian 6.0, with an nginx server in front serving media, and proxying to apache+mod_wsgi to serve django.

Normal navigation on the site works fine, but whenever I click on a link without a trailing slash, or I submit a form, instead of redirecting me to www.domain.com/path/to/page/ I will be shown ip-11-111-11-111/path/to/page/, with ip-11-111-11-111 being my AWS internal IP add开发者_C百科ress. The forms/links are working as the python code is executed, but when the templates are called, the url is 'built' wrong. Setting APPEND_SLASH = True doesn't fix it, and the same behaviour happens with the admin site, so I suspect it is some general issue rather than a bug in my code.

Has anybody encountered this problem? Any suggestions on how to solve it?

I've been googling this for weeks now and still can't figure it out, any ideas on where I should be looking would be appreciated as well.

In case anybody else has the same problem, the issue was apache redirecting non-www sites to the address it was listening on, which was the internal ip. I fixed it by forcing www. in nginx so that apache will never need to redirect.