VPS Server Error Return Status Details

When we use the host or VPS, sometimes due to website problems or VPS problems, we do not open the website when we open it, but display error messages. For example, our common 400 errors and 502 errors. When we see the error, we will be very frightened. We don't know what the problem is. If we use the host, we will scold the host company how to garbage. When using VPS, you will definitely think that our VPS is hacked, and the data may be completely missing.

In fact, there is no need to be so panic. Different error signals have different meanings. Lao Zuo has sorted out all the server error return statuses, and can solve the problem by comparing what your error means.

The HTTP 400 request is invalid
HTTP 401.1 Unauthorized: Login failed
HTTP 401.2 Unauthorized: Login failed due to server configuration problems
HTTP 401.3 ACL prohibits access to resources
HTTP 401.4 Unauthorized: Authorization denied by filter
HTTP 401.5 Unauthorized: ISAPI or CGI authorization failed
HTTP 403 Access Forbidden
HTTP 403 Access to Internet Service Manager (HTML) is limited to Localhost
HTTP 403.1 Forbidden: Forbidden executable access

HTTP 403.2 No Access: No Read Access
HTTP 403.3 Access Forbidden: Write Access Forbidden
HTTP 403.4 Access Forbidden: Require SSL
HTTP 403.5 Access Forbidden: Require SSL 128
HTTP 403.6 Access Forbidden: The IP address is denied
HTTP 403.7 Access Forbidden: Customer certificate required
HTTP 403.8 No Access: No Site Access
HTTP 403.9 Access Forbidden: Too many connected users
HTTP 403.10 Access Forbidden: Invalid configuration
HTTP 403.11 Access Forbidden: Password Change
HTTP 403.12 Access Forbidden: Mapper denied access
HTTP 403.13 Access Forbidden: The customer certificate has been revoked
HTTP 403.15 Access Forbidden: Too many customer access permissions
HTTP 403.16 Access Forbidden: The customer certificate is untrusted or invalid
HTTP 403.17 Access Forbidden: The customer certificate has expired or has not yet become effective
HTTP 404.1 Unable to find Web site
HTTP 404 cannot find file
HTTP 405 resource is prohibited
HTTP 406 is unacceptable
HTTP 407 requires proxy authentication
HTTP 410 is never available
HTTP 412 Prerequisites Failed
HTTP 414 request URI is too long
HTTP 500 internal server error
HTTP 500.100 internal server error ASP error
HTTP 500-11 server shutdown
HTTP 500-12 Application Restart
The HTTP 500-13 server is too busy
The HTTP 500-14 application is invalid
HTTP 500-15 does not allow requesting global.asa
Error 501 not implemented
HTTP 502 gateway error

Is it easy to solve the problem by comparing the wrong meaning behind? It can be identified one by one whether it is our website or the host company.