Hi,
Currently I have a arch linux server running PPTP VPN (for iOS devices
only), and I forward all PPTP VPN packets to local eth0:
iptables -A POSTROUTING -s -o eth0 -j MASQUERADE
Now I got a external proxy, and I want all the traffic currently through
the PPTP VPN then through that extenal proxy (it's a http proxy, and
requires authentication). If my description is confusing, please consult
this chart:
iOS --> Server 1 (PPTP VPN) --> Server 2 (http proxy, authentication
required) --> Web
Server {1,2} both have dedicated external IP address. I have root
permission for Server 1, and nothing for Server 2 (except for the http
proxy account).
I'm thinking about running a http server that handles all the
authentication for Server 2 (such as dante?), then forward all packets
to that server (running in Server 1). But I don't know how to write
corresponding iptables rules. So how to write such rules?
Regards.