Reverse Connection Proxy: Fire Penetration Technology

How does a reverse connection agent help you open a window when fire blocking a door?

Guys must have encountered this situation when engaging in data docking: the intranet machine is fire-locked to death, the outside equipment can not be connected to the dead. At this timeReverse Connection ProxyIt's like a lightweight courier who can bypass fire prevention to get data out the door. How does it work? Let's use the courier station to make an analogy.

Ordinary agent is like you go to the post station to send express, you have to run a trip by yourself. The reverse proxy is the post station to take the initiative to pick up the goods, especially suitable for the home door is locked (fire restrictions). This "post office" is the proxy server we are talking about, here we recommend usingipipgoof dynamic residential IPs that masquerade as normal user access and are not easily recognized.

 Python reverse connection example (client side)
import socket

proxy_address = ('proxy.ipipgo.com', 50050) ipipgo proxy node
local_service = ('127.0.0.1', 8080) local service

tunnel = socket.create_connection(proxy_address)
tunnel.sendall(b'CONNECT /reverse HTTP/1.1rr') create reverse channel

while True: tunnel.sendall(b'CONNECT /reverse HTTP/1.1rr')
    data = tunnel.recv(1024)
     The business data flow is handled here...

Hands-on building of reverse channel

1. Go firstipipgo official websiteGet a trial package and chooseLong-lasting residential IP(Don't use the server room IP, it's easy to be detected)
2. Configure the client on the machine inside the firewall to send heartbeat packets to the proxy server at regular intervals.
3. Extranet equipment provided through proxy service providersDedicated Channel IDaccess
4. The data is encrypted by TLS and disguised as normal HTTPS traffic.

What scenarios is this technology best suited for?

① Remote control of equipment across regionsFor example, if the head office's system has to interface with a branch's cash register, the branch's network simply won't open an end port.
② IoT Device Operation and MaintenanceThe smart devices in the factory, the network strategy is as tight as a steel barrel.
③ Timed synchronization of data: Transmitting store sales data back to HQ in the early hours of the morning every day is a lot easier than using a reverse connection.

A practical guide to avoiding the pit

I've encountered customers using free proxies to get reverse connections, and the result:
❌ Connections keep dropping - poor quality free IP pools
❌ Slow as a dog - shared bandwidth is being crowded by multiple people
❌ Changing configurations in three days - IP survival time is too short
replaced byDedicated lines for ipipgoThey've got a lot of problems. They have a homeIntelligent RoutingThe function, which can automatically select the fastest node, is much more hassle-free than switching manually.

Frequently Asked Questions

Q: Does the reverse connection consume more traffic?
A: Compared with the ordinary proxy more than about 15% heartbeat package overhead, but ipipgo's traffic packages to buy 1G to send 200M, completely enough!

Q: What should I do if my intranet device is disconnected?
A: The ipipgo client hasDisconnect and reconnect mechanismThe channel is automatically restored in a maximum of 30 seconds.

Q: What if I want to connect multiple devices at the same time?
A: Create multiple channel IDs in the management background, and each device can be identified independently, supporting up to 500 parallel connections.

Q: How do I test connection stability?
A: provided by ipipgo7-Day History LogThe report can check hourly connectivity and export a PDF report.

Finally said a true story: last year, a hotel chain used this method of docking more than 200 stores monitoring system, the whole did not move the store's network settings. Their technical director's words: "If I had known it was so simple, I should not have let the network administrator tossed three months to open the mouth!"