Help Center/ Web Application Firewall/ User Guide (Paris) / Dedicated WAF Mode/ Website Settings/ Advanced Settings/ Enabling Connection Protection
Updated on 2024-03-14 GMT+08:00
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Enabling Connection Protection

If a large number of 502 Bad Gateway and 504 Gateway Timeout errors are detected, you can enable WAF breakdown protection and connection protection to let WAF suspend your website and protect your origin servers from being crashed. When the 502/504 error requests and pending URL requests reach the thresholds you configure, WAF enables corresponding protection for your website.

Prerequisites

  • The website you want to protect has been added to WAF.
  • You have upgraded the dedicated WAF instance to the latest version. For details, see Upgrading a Dedicated WAF Instance.

Constraints

Procedure

  1. Log in to the management console.
  2. Click in the upper left corner of the management console and select a region or project.
  3. Click in the upper left corner and choose Web Application Firewall (Dedicated) under Security.
  4. In the navigation pane, choose Website Settings.
  5. In the Domain Name column, click the website domain name to go to the basic information page.
  6. In the Connection Protection area, click the status toggle to enable it.
  7. Click next to each parameter, edit Breakdown Protection and Connection Protection parameters to meet your requirements, and click to save settings. Table 1 describes these parameters.

    Table 1 Connection Protection parameters

    Parameter

    Description

    Example Value

    Breakdown Protection

    502/504 Error Threshold

    30s 502/504 Error Threshold

    1000

    502/504 Error Percentage (%)

    A breakdown is triggered when the 502/504 error threshold and percentage threshold have been reached.

    90

    Initial Downtime (s)

    Protection period upon the first breakdown. During this period, WAF stops forwarding client requests.

    180

    Multiplier for Consecutive Breakdowns

    The maximum multiplier you can use for consecutive breakdowns. The number of breakdowns are counted from 0 every time the accumulated breakdown protection duration reaches 3,600s.

    For example, assume that Initial Downtime (s) is set to 180s and Multiplier for Consecutive Breakdowns is set to 3.
    • If the breakdown is triggered for the second time, that is, less than 3, the protection duration is 360s (180s x 2).
    • If the breakdown is triggered for the third or fourth time, that is, equal to or greater than 3, the protection duration is 540s (180s x 3).
    • When the accumulated downtime duration exceeds 1 hour (3,600s), the number of breakdowns are counted from 0.

    3

    Connection Protection

    Pending URL Request Threshold

    Connection Protection is triggered when the number of read URL requests reaches the threshold you configure.

    6,000

    Duration (s)

    Protection duration. During this period, WAF stops forwarding client requests.

    60

Parent topic: Advanced Settings