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    Private Network Access

    Last updated: 2024-01-08 09:12:28
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      Private network services are LAN services, where cloud services can access each other through internal linkages. Tencent Cloud services can access each other through internet access or the private network of Tencent Cloud. Tencent Cloud data centers are interconnected with underlying networks of megabytes/gigabytes. They enable communications via private networks with large bandwidth and low latency, which are free of charge if in the same region to help you build a network architecture flexibly.

      Private IP Address

      Overview

      Private IPs are addresses that cannot be accessed through the Internet. Each instance has a default network interface (i.e., eth0) for assigning private IPs. Private IPs can be automatically assigned by Tencent Cloud, or you can specify on your own (only for VPC environment).
      Note:
      If you change the private IP within the operating system, the private network may be interrupted.

      Attributes

      User-level isolation: The private networks of different users are isolated from each other. By default, cloud services of different accounts can not communicate over the private network.
      Regional isolation: The private networks in different regions are isolated from each other. By default, cloud services under the same account in different regions can not communicate over the private network.

      Application Scenarios

      Private IP can be used for the communication between CLBs and CVM instances, and between CVM instances and other Tencent Cloud services (such as TencentDB).

      IP Allocation

      Each CVM instance is assigned a default private IP address upon the launch. The private IP varies by the network environment:
      Classic network: private IP address is automatically assigned by Tencent Cloud and cannot be changed.
      VPC: Tencent Cloud VPC CIDR currently allows you to use one of the following IP ranges, and the maximum:
      10.0.0.0 - 10.255.255.255 （minimum masks are /12 and /28）
      172.16.0.0 - 172.31.255.255 （minimum masks are /12 and /28）
      192.168.0.0 - 192.168.255.255 （minimum masks are /16 and /28）

      Private Network DNS

      DNS Server Address

      Private network DNS service is used for domain name resolution. If DNS is configured incorrectly, domain name cannot be accessed. Tencent Cloud provides reliable private network DNS servers in different regions. Specific configurations are shown below:
      Network Environment
      Region
      Private Network DNS Server
      Classic Network
      Guangzhou
      Guangzhou Zone 1:
      10.112.65.31
      10.112.65.32
      Guangzhou Zone 2:
      10.112.65.31
      10.112.65.32
      Guangzhou Zone 3:
      10.59.218.193
      10.59.218.194
      Guangzhou Zone 4:
      100.121.190.140
      100.121.190.141
      Shanghai
      10.236.158.114
      10.236.158.106
      Beijing
      10.53.216.182
      10.53.216.198
      North America
      10.116.19.188
      10.116.19.185
      Hong Kong, China
      10.243.28.52
      10.164.55.3
      Singapore
      100.78.90.19
      100.78.90.8
      Guangzhou Open Zone
      10.59.218.18
      10.112.65.51
      Chengdu
      100.88.222.14
      100.88.222.16
      Silicon Valley
      100.102.22.21
      100.102.22.30
      Frankfurt
      100.120.52.60
      100.120.52.61
      Seoul
      10.165.180.53
      10.165.180.62
      VPC
      All Regions
      183.60.83.19
      183.60.82.98

      Operation Guide

      You can view or modify the private IP address of the instance. For detailed instructions, see:
      Getting Private IP Addresses and Setting DNS
      Modifying Private IP Addresses
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