Limit access to one subnet?

To: netfilter@lists.netfilter.org
Subject: Limit access to one subnet?

I’m trying to figure out how to allow only 141.225.x.x to access port 8080 on a server.  It’s a proxy
server and obviously I don’t want anyone outside of campus to be able to access it.

I mean, denying access to some service is the most basic function of a packet filter. How can anybody planning to deploy netfilter not know this?

Anyway, in this case, it would of course be the best solution to configure the service itself to only allow on-campus access. But, alas, one needs too read the docs for the proxy software in use to make this possible, eh?