The HTTP check may return the following errors and warnings:
- Errors
- Warning
Response Error
The system expects a response with a status of 200 OK. If it receives any other response, it will issue an error message. The most common errors are:
301 Moved permanently
The page is permanently redirected to another domain address. It can be set on the domain or via .htaccess file.
302 Found
The page is redirected, but the redirect does not have the permanent flag (301).
403 Forbidden
The address is unavailable. For common causes of this error and solutions, see Webhosting – Error 403 Forbidden.
404 Not Found
Target file wasn’t found. For common causes of this error and solutions, see Webhosting – Error 404 Not Found.
500 Internal Server Error
An internal server error has occurred. For common causes of this error and solutions, see Webhosting – Error 500 Internal Server Error.
502 Bad Gateway
A proxy or connection error occurred. If it persists for more than 1 hour, contact customer support.
Slow
A 200 OK response arrived, but later than the time you set. For WEDOS EWM, this time is set to 2000ms.
Unavailable
If the server does not return any response at all, it can be in one of the following states:
Operation timed out after X milliseconds with 0 bytes received.
The connection was established successfully, but no data was received from the server. The server may be overloaded or misconfigured.
Failed to connect to domena.tld port 443: Connection refused.
The server refused the connection. There may be a problem with SSL settings, access permissions, or the server is down.
Failed to connect to www.example.com port 443: No route to host.
The server is unavailable. It could be a network problem or the IP address is not available – check your DNS settings and server configuration.
Could not resolve host: domena.tld.
An error occurred during DNS resolution. Check DNS record settings and DNS server availability.
Resolving timed out.
Timed out while communicating with DNS. Check DNS settings and DNS server availability.
Connection timed out after X milliseconds.
Timed out trying to connect to the server. Check your web server settings.
SSL read error: Connection reset by peer (errno104).
Establishing the SSL / TLS connection was interrupted. There may be a problem with the SSL certificate or server settings.
HTTPS certificate error: Untrusted CA or missing intermediate certificate.
The certification authority is not trusted, or an intermediate certificate is missing. Check the SSL certificate settings and validity.
SSL certificate problem: certificate has expired.
SSL certificate expired. Check the validity of the SSL certificate and update it if necessary.
Warning
Common warnings include:
Certificate About to Expire
The listed SSL certificate will expire soon. Verify the validity of your certificate, or obtain a new one. If you are using a Let’s Encrypt certificate issued by us, contact support.
IP Blacklisted
The server’s IP address is blacklisted.
Domain Blacklisted
The domain is blacklisted.