VPS support for IPv6 proxies? Dual-stack technology in action

Hands-on teaching you to play IPv6 proxy with VPS

Recently, a lot of friends are asking, using VPS to build a proxy always encountered the situation of IP is not enough. This is really a headache, just like opening an Internet cafe, the result of the Internet cable is not long enough to be as frustrating. But don't panic, today we will nag how to use IPv6 and dual-stack technology to solve this problem.

Why do you have to toss IPv6?

Nowadays, IPv4 addresses are rarer than pandas, and the price is even higher. For example, you spend a lot of money to rent a VPS may be divided into a shared IPv4, use it like the morning rush hour subway. At this time, the advantages of IPv6 are obvious - the address pool is as large as the Pacific Ocean, no need to grab. And many regional networks are getting better and better support for IPv6, which is simply a "new continent" in the proxy world.

Here's the point:

• IPv4 address price ≈ gold, IPv6 ≈ cabbage
• More stable IPv6 lines in many overseas server rooms
• Ideal for scenarios that require a large pool of agents

Dual Stack Technology Practical Manual

First explain what is called dual-stack, simply put, it is to allow the device to simultaneously support IPv4 and IPv6 two sets of network protocols. It's like a cell phone with dual SIM cards and dual standby, which side of the signal is good to use which.

Recommended hereipipgoof the proxy service, his family has specifically done dual-stack optimization. Sign up to get the API and go straight to the configuration code:

 Install the necessary components
sudo apt-get install -y squid3

 Modify the squid configuration
http_port 3128
acl ipv6_net src your_ipv6_subnet
http_access allow ipv6_net

 Bind the ipipgo proxy node
cache_peer ipipgo-proxy-node.parent.xxxx ipv6=yes connect-timeout=5

Take care to replace your_ipv6_subnet with your own address segment, this can be seen in the VPS console. Restart the service after configuration withcurl -6 ifconfig.coTest it and it works if you can see the IPv6 address.

A guide to avoiding the pit (with a bloody history)

Once to help customers debugging, dead can not be connected, tossing half a day to find that the server room default off IPv6 channel. SoMake sure to check for native IPv6 support when buying a VPS, don't just look at the cheap prices.

QA time

Q: What are the special advantages of using an IPv6 proxy?
A: The most direct is low cost and higher request success rate in many scenarios. Like ipipgo's IPv6 proxy pool, the real test saves 40% cost than the traditional solution.

Q: Does dual-stack technology affect speed?
A：处理得当反而更快，因为能自动选最优线路。建议开启TCP_FASTOPEN参数，实测能降20%左右。

Q: How exactly does ipipgo work?
A: After registering and getting the API key, their documentation is quite clear. The point is to enable the smart routing mode, the system will automatically allocate IPv4/IPv6 resources.

One last rant, technology is changing fast. Figuring out IPv6 proxies now is like buying Bitcoin ten years ago. If you don't understand anything, please feel free to ask, and we'll see what happens in the comments section!