IPv6 and IPv4 dual Connection [closed]

Question

Our college has a fully IPv4 LAN connection, provided with a proxy server in the Border. And three Internet service provider provide the net connection in our college. Now one ISP is going to provide a IPv6 connection and we want to implement IPv6 in some network of our college, let's say in the Admin block. So I just want to know what are the necessary action we have to take we have to do to implement this.

The main problem we face is that the three ISPs are firstly connected to a switch and then with proxy server and if we are going to reestablish the whole lan connection for that IPV6 part then a large cost will be spent.

Is there any other way to implement this or any type proxy server which can handle both type of connection i.e, IPv4 and IPv6?

Answer 1

There are two ways to do this:

1. Give the proxy server both an IPv4 and IPv6 address on the outside, and don't change anything on the inside. If all internet traffic must go through the proxy then this is the way to go.
2. Put an IPv6 router/firewall between the outside and the inside, and route a /64 block of IPv6 addresses to the inside network. Activate Router Advertisements and optionally DHCPv6 on the inside network, and all hosts on the inside can reach the IPv6 internet. Also give the proxy server an IPv6 address on both the inside and outside networks. This is the best solution if you want to do part of the traffic through the proxy and part of the traffic directly to the internet.

In case 2: you probably already have NAT routers between the inside and outside networks. Make sure those routers can do IPv6 routing and firewalling, or replace them with routers/firewalls that can.