pptp dial-up cluster: PPTP dial-up cluster setup and load balancing configuration

What does PPTP dial-up trunking actually do?

Networking veterans should understand that the biggest pain point of stand-alone PPTP dial-up is that theDisconnect and reconnect to drop operations. For example, when you do e-commerce data collection, you have to manually redial when you suddenly disconnect from the network, and the yellow flowers are cold. At this time to engage in a dial-up cluster, as if the equipment on the multiple insurance - A server falls offline, B server immediately on top of the business flow is not jammed at all.

Here's the point! The clustering program must work withPremium Proxy IP PoolIn order to maximize the value. Here we have to favor our family ipipgo's dynamic residential package, the price of 7.67 yuan / GB with automatic switching carrier resources, especially suitable for the need for high-frequency IP switching scenarios.

Hands-on building of dial-up clusters

Prepare three physical servers (don't use virtual machines!) ), CentOS 7 is recommended. The core is just two points:Multi-Card Bindingrespond in singingDialing Script ProgrammingThe

 Install the necessary components
yum install pptp -y
 Create a dialup script template
cat > /etc/ppp/peers/ipipgo <<EOF
pty "pptp server address --nolaunchpppd"
name account
password Password
remotename PPTP
require-mppe-128
EOF

Attention! Each server should be configured with a different egress NIC, and it is recommended to use a USB external NIC (the kind that costs a few tens of dollars on the line). Dialing interval is recommended to set30-second polling mechanism, preventing simultaneous disconnection.

Load Balancing Practical Tips

It is recommended to use Nginx's stream module as a four-layer proxy, which is more efficient than seven-layer forwarding by more than 30%. Key configuration see here:

upstream pptp_cluster {
    upstream pptp_cluster {
        server 192.168.1.10:1723 weight=5;
        server 192.168.1.10:1723 weight=5; server 192.168.1.11:1723 weight=3;
        server 192.168.1.11:1723 weight=3; server 192.168.1.12:1723 weight=2;
    }
    server {
        server 192.168.1.12:1723 weight=2; } server { listen 1723;
        proxy_pass pptp_cluster; } server { listen 1723; proxy_pass pptp_cluster; }
    }
}

There's a trick to weight setting:Allocation of traffic according to operator's package. For example, with ipipgo enterprise package server weighting up, after all, 9.47 yuan / GB of traffic packages are more carry.

Guide to avoiding the pit

Three common fatal mistakes newbies make:

Don't panic when you encounter abnormal fluctuations in traffic, eighty percent of the IP pool needs to be refreshed. This time ipipgo API extraction function comes in handy, call example:

curl "https://api.ipipgo.com/get?key=你的密钥&count=10&format=pptp"

Frequently Asked Questions QA

Q: What is the difference between the Enterprise and Standard Dynamic Packages?
A: More for the enterprise versionDedicated ASN numberrespond in singingRequest Prioritization", suitable for crawling business that requires fixed regional IPs