Let's talk about IPv4 to IPv6 tunnel

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When is IPv6 tunneling used?

Connect to a pure IPv6 network, such as some campus network PT stations

When used on a server, you can add an AAAA record to your server directly, and users with pure IPv6 (such as domestic education networks) can directly access your server.

Intranet penetration: others can directly penetrate into the intranet using IPv6 addresses

Tutorial

1. Register Tunnel Broker

Registration is relatively simple, so the process is omitted

2. Create a tunnel

Click Create Regular Tunnel

Configuring the Client

Select Example Configurations

Select the system type. Here we use CentOS. If there is no system type, select Linux-net-tools.

Execute the above command on the server

The configuration generated at this time will become invalid after restarting the server. If you want the tunnel configuration to take effect after booting, you need the following configuration:

 # echo "sit1 ::/0" >/etc/sysconfig/ static -routes-ipv6
 # cat>/etc/sysconfig/network-scripts/ifcfg-sit1<<EOF
 DEVICE=sit1
 ONBOOT=yes
 IPV6INIT=yes
 IPV6TUNNELIPV4=66.220.18.42
 IPV6ADDR=2001:470:c:113a::2/64
 EOF
 # sed -i 's/^NETWORKING_IPV6.*/NETWORKING_IPV6=yes/' /etc/sysconfig/network

test:

Remember to ping the accessible domestic IPv6 addresses, such as Tsinghua University's: