Use IPIP to open tunnels and accelerate network access

Used to speed up the network.

View IPIP module:

modinfoipip

Start tunnel establishment:

Note: Here the public IP of host A is 1.1.1.1 and the public IP of host B is 2.2.2.2

A host operation:

ip tunnel add ipip-tunnel mode ipip remote 2.2.2.2 local 1.1.1.1 ifconfig ipip-tunnel 10.0.1.1 netmask 255.255.255.0

B host operation:

ip tunnel add ipip-tunnel mode ipip remote 1.1.1.1 local 2.2.2.2 ifconfig ipip-tunnel 10.0.1.2 netmask 255.255.255.0

At this time, you can ping the intranet IP 10.0.1.1 set by host A on host B to see if it is connected. If it is the same, it means that it is successfully connected.

In addition, we introduce a method of directly using the network card configuration file (CentOS system):

A host (/etc/sysconfig/network-scripts/ifcfg-ipip-tunnel)

DEVICE=ipip-tunnel ONBOOT=yes TYPE=IPIP TTL=255 PEER_OUTER_IPADDR=2.2.2.2 PEER_INNER_IPADDR=10.0.1.2 MY_OUTER_IPADDR=1.1.1.1 MY_INNER_IPADDR=10.0.1.1

B host (/etc/sysconfig/network-scripts/ifcfg-ipip-tunnel)

DEVICE=ipip-tunnel ONBOOT=yes TYPE=IPIP TTL=255 PEER_OUTER_IPADDR=1.1.1.1 PEER_INNER_IPADDR=10.0.1.1 MY_OUTER_IPADDR=2.2.2.2 MY_INNER_IPADDR=10.0.1.2

Then start the network card

Reprinted from: https://eqblog.com/ipip-tunnel.html

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