l2tp: L2TP Protocol Proxy Configuration Tutorial

Hands-on teaching you to use L2TP to get a proxy IP

You may have heard of the L2TP protocol, but you may be a bit confused when it comes to configuring it yourself. This thing in the field of proxy IP is actually quite practical, especially the need to stabilize the long connection scenario. Let's take ipipgo's proxy service today to give a chestnut, to ensure that you can get started after reading.

Let's just figure out what L2TP is.

L2TP is known as Layer 2 Tunneling Protocol, which means Layer 2 Tunneling Protocol. This protocol is a bit old-school, but quite reliable, can be your device's network traffic package a "shell", through the proxy server to forward out. Compared with our commonly used HTTP proxy, L2TP is more suitable for scenarios that require continuous connection, such as crawler collection or long time data transmission.

Be careful, you have to configure thePrepare two things at the same timeThe address of the server and the shared key given by the proxy service provider. Here I must praise ipipgo, their background can directly check the L2TP dedicated access information, do not have to blind folding.

Five Steps to Hands-on Configuration

Here is an example of Windows 11, other systems operate in much the same way:

1. Control Panel → Network and Internet → Network Connections
2. Press Alt to bring up the menu bar → File → New incoming connection.
3. Check "Allow other devices to connect via Internet". 4.
4. Select "Via Internet" → select L2TP/IPsec for protocol type. 5.
5. Fill in the server address and pre-shared key provided by ipipgo.

Let's focus on the key, which is a pitfall that many newbies fall into. ipipgo's key isCase-sensitive mixed stringsIt is recommended to copy and paste directly. If you are typing by hand, remember to check for extra spaces or wrong letters.

Parameter configuration should be fine-tuned

These parameters must be correct in the advanced settings:

If you find that your internet connection is as slow as a snail's pace, it's probably because you haven't adjusted the MTU value correctly. ipipgo's tech guy told me that their servers recommend using the value of 1360, which has been tested to be effective.

QA session for troubleshooting

Q: What should I do if I get disconnected when I'm connected?
A: Don't panic, first check three places: 1) whether the key has been copied in full 2) whether the server address with or without a port number (ipipgo's address does not have a port) 3) whether the local firewall has released the L2TP protocol

Q: What should I do if the certificate error is displayed?
A: In the security settings, change "Encryption required" to "Allow no encryption", this option is hidden deep, in the Advanced Properties → Security tab

Why do you recommend ipipgo?

After testing more than a dozen service providers, I finally locked ipipgo for three main reasons:

1. support for L2TP/IPsec native protocols (many merchants now only open HTTP proxy)
2. special tunnel optimization line
3. the background can directly export configuration scripts

Their packages are also real, especially static residential agent, do data collection brother should understand - 35 dollars can be fixed IP with a month, cheaper than buying cloud servers. Recently found the console addedGenerate L2TP configuration file with one clickfeatures that are especially friendly to techies.

Lastly, although L2TP is stable, but after all, it is an old protocol, if you encounter carrier restrictions (such as some campus networks), you can try ipipgo's Socks5 proxy or TK line, these two goods are more camouflaged. Specifically how to choose depends on the business scenario, don't be silly only recognize a protocol.