I'm using dial-up ISDN connections to connect to the internet.
I've got a new free connection provided by my university to connect to the internet.
This connection needs to redirect all the trafic through a proxy server. I can easily access the internet with firefox by configuring it to use the proxy server but what about all the other programs?
Is there a way to tell the system to use a proxy for everything ?
(maybe add something in resolv.conf or in a file in /etc/ppp/ or something like that)

I'm using slackware 10.2 and wvdial (to connect) if that matters at all.

It's not a standard but some apps look at the environment variable http_proxy or HTTP_PROXY
export http_proxy="1.1.1.1:8080"

Iptable could be helpful to redirect all traffic through the proxy if it's a transparent proxy.

AFAIK some application (like cvs,..) will not work through a proxy and the only method is to establish a tunnel (you will need an external machine to untunnel http)

Thanks for the input.
I don't have time know to learn how to write iptables scripts, but the enviromental variable works at least with wget.
Thanks again.