套件：ipip（1.1.11 以及其他的） [debports]
IP over IP Encapsulation Daemon
This daemon provides an alternative to the kernel-resident support for IP encapsulation links. It is better suited for situations where there are many encapsulation connections to be managed, such as is the case for amateur radio interconnection of network 44. Also, because the daemon is outside the kernel, it provides an excellent environment for experimenting with alternate mechanisms for distributing encapsulation routing updates.
If you need one encapsulation link, use the kernel's built-in support. If you need a lot of encapsulation links, give this daemon a try.