FAQ

Category

Questions

Product FAQ

• Pay-as-you-go billing

  • Pay-as-you-go (legacy) FAQ

  • Pay-as-you-go 2.0 FAQ

• Website access configuration

  • Can a domain name be added to WAF in both transparent proxy mode and CNAME mode?

  • What do I do if a domain name added in transparent proxy mode no longer requires WAF to forward traffic and provide protection?

  • After I use the transparent proxy mode, can the origin server obtain the real IP addresses of clients?

  • If the certificate bound to a port is updated, do I need to re-upload the certificate to the WAF transparent proxy module?

  • If a domain name is configured on multiple SLB instances, how do I add the domain name in transparent proxy mode?

  • If multiple domain names are configured on an SLB instance, what are the effects if I add only one of the domain names in transparent proxy mode?

  • Why can't I find the Layer 7 SLB instance that I want to add in transparent proxy mode?

Website access topics

• Website access issues

• How do I troubleshoot HTTPS access issues?

• HTTPS access exceptions caused by SNI compatibility (server certificate not trusted)

• What to do if an ECS origin server protected by WAF is compromised

• What do I do if blackhole filtering is triggered for my WAF instance?

Product configuration

• Supported domain name suffixes

• Do unconfigured ports of a protected website pose a security risk to the origin server?

• Web Application Firewall traffic access diagram

• CC attack protection: Emergency mode

• How to troubleshoot and handle 405 status code errors

Fault analysis

• What do I do if services on non-standard ports cannot be added to WAF Pro?

• What do I do if the "Invalid HTTPS private key format" error is reported when I upload an HTTPS certificate?

• How to troubleshoot a certificate and private key mismatch

• Web Application Firewall blocking file upload requests

• How do I resolve logon status loss?

• What do I do if a persistent connection times out?

• Why can't I access miniapps after I configure WAF?

• Why can't some clients access my website after I configure WAF?

Services

• Alibaba Cloud DNS versions

Concepts

• Definitions of common web vulnerabilities

• Why can't I directly access the CNAME generated by WAF?