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This article introduces the relevant knowledge of "A brief introduction to Tunnel Agent Technology". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The tunnel agent is the mode in which the proxy IP exists. Generally speaking, it is a proxy IP. Compared with the traditional fixed proxy IP, its special feature is that it automatically changes the IP on the proxy server, so that each request uses a different IP. In order to realize the tunnel proxy, we must first establish the proxy server, and then there must be a large number of proxy IP to switch. Generally speaking, realization requires some economic foundation and technical strength.

1. Tunnel Agent (TB) technology provides a simplified tunnel configuration method, which requires both sides of the tunnel to support dual stacks.

Through TB, users can easily establish a tunnel connection with IPv6ISP to access externally available IPv6 resources; ISP provides a very simple access method through a dedicated tunnel server to automatically manage tunnel requests issued by users.

In the tunnel agent system, all functional units (including client and TB, TB and tunnel server, TB and DNS) need to be protected by security mechanisms. There are many security mechanisms to choose between the customer and the TB (for example, you can use SSL to encrypt sending and download on the WEB server, or you can use a simple username / password program for access control, and so on). . SNMP can be used between TB and tunnel server. If you use a dynamic DNS update, the security is exactly the same as SNMP; if you use a simple method based on the RSH command, you can also use standard IPSEC.

2. Tunnel agent is applied to independent small IPv6, especially the IPv6 hosts distributed on the IPv4 Internet, which need to connect to the existing IPv6 network.

Tunnel Agent (TB) provides a way to simplify tunnel configuration and reduce heavy tunnel configuration work. The idea of tunnel agent is to automatically manage tunnel requests made by users by providing special servers as tunnel agents. Users can easily establish a tunnel connection with the IPv6 network through TunnelBroker, thus accessing the externally available IPv6 resources. The transition mechanism of tunnel proxy is very simple to attract more IPv6 users to implement IPv6 connections in the early days of IPv6.

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