Documentation forSolarWinds Observability Saas

HTTP and other status codes in SolarWinds Observability

When you monitor your websites or URIs through SolarWinds Observability Synthetic monitoring , you may encounter outages. Outages can occur when any site or server doesn't respond with an HTTP 200 status of OK, and instead responds with an HTTP error message. See the table below for information about errors you may encounter.

Check Type Short Description Detailed Description
HTTP Timeout (> 30s) The page took too long to load and timed out.
HTTP HTTP Error 400 HTTP Server Error 400 Bad Request
HTTP HTTP Error 401 HTTP Server Error 401 Unauthorized
HTTP HTTP Error 403 HTTP Server Error 403 Forbidden
HTTP HTTP Error 404 HTTP Server Error 404 Not Found
HTTP HTTP Error 405 HTTP Server Error 405 Method Not Allowed
HTTP HTTP Error 406 HTTP Server Error 406 Not Acceptable
HTTP HTTP Error 407 HTTP Server Error 407 Proxy Authentication Required
HTTP HTTP Error 408 HTTP Server Error 408 Request Timeout
HTTP HTTP Error 500 HTTP Server Error 500 Internal Server Error
HTTP HTTP Error 502 HTTP Server Error 502 Bad Gateway
HTTP HTTP Error 503 HTTP Server Error 503 Service Unavailable
HTTP HTTP Error 504 HTTP Server Error 504 Gateway Timeout
HTTP HTTP Error 505 HTTP Server Error 505 HTTP Version Not Supported
HTTP No data from server No data received from server
HTTP Required string missing The required string was not found
HTTP Invalid HTTP response Invalid HTTP response received from server
HTTP Too many redirections Maximum redirection depth reached
HTTP Infinite redirection loop Redirection creates an infinite loop
HTTP SSL connection error Cannot make SSL connection - Error on receive
HTTP Timeout (> 30s) Socket timeout, unable to connect to server
HTTP Connection refused Connection refused by server
HTTP Unknown target The URL is invalid or the server was not found
HTTP Network error Network is unreachable
HTTP Network error No route to host
HTTP DNS error Temporary failure in name resolution
HTTP Connection reset Connection reset by peer
HTTP DNS error Non-recoverable failure in name resolution
HTTP Unknown target The URL is invalid or the server was not found
HTTP Unknown error Unknown internal error
HTTP Redirection error Could not find redirect location
HTTP SSL connection error Cannot make SSL connection - No data received from server
HTTP Connection reset Error on receive
HTTP Forbidden string found The string that should not exist on the page was found
HTTP HTTP Error 413 HTTP Server Error 413 Request Entity Too Large
HTTP HTTP Error 507 HTTP Server Error 507 Unexpected error
HTTP HTTP Error 520 HTTP Error 520
Ping Timeout Forced timeout
Ping Packet loss Packet loss occurred
Ping Unknown target Invalid hostname/address
Ping Timeout Time to live exceeded
Ping Network error Host Unreachable
Ping Unknown error Unknown internal error
Ping Timeout Ping timed out
Ping Network error Host not found
Ping Network error Multiple hosts responded
Ping Unknown error Unknown internal error
Ping Timeout Ping timed out
Ping Network error Port unreachable
Ping Unknown error Unknown internal error
TCP Port Timeout (> 30s) The connection took too long to establish
TCP Port Unknown target Invalid hostname, address or socket
TCP Port Connection refused Connection refused by host
TCP Port Timeout (> 30s) Socket timeout
TCP Port Network error No route to host
TCP Port Network error Network is unreachable
TCP Port Unknown target Name or service not known
TCP Port Unknown target Servername was not provided or unknown
TCP Port DNS error Temporary failure in name resolution
TCP Port Connection reset Connection reset
TCP Port Invalid response Unexpected response from host/socket

HTTP Status Codes

Check Type Short Description Long Description
HTTP HTTP 100 Continue HTTP request has been received.
HTTP HTTP 101 Switching Protocols HTTP request to switch protocols.
HTTP HTTP 102 Processing HTTP Processing request.
HTTP HTTP 103 Early Hints HTTP returns some headers before final message.
HTTP HTTP 200 OK HTTP successful request.
HTTP HTTP 201 Created HTTP created resource.
HTTP HTTP 202 Accepted HTTP accepted for processing.
HTTP HTTP 203 Non-Authoritative Information  
HTTP HTTP 204 No Content HTTP not returning content.
HTTP HTTP 205 Reset Content HTTP processed request, but is not returning content.
HTTP HTTP 206 Reset Content HTTP is returning partial content.
HTTP HTTP 207 Multi-Status HTTP multi status
HTTP HTTP 208 Already Reported HTTP already reported
HTTP HTTP 226 IM Used HTTP IM used
HTTP HTTP 300 Multiple Choices  
HTTP HTTP 301 Moved Permanently HTTP request should be redirected to given URI
HTTP HTTP 302 Found HTTP to browse to another URL
HTTP HTTP 303 See Other HTTP GET to another URI
HTTP HTTP 304 Not Modified HTTP Not modified
HTTP HTTP 305 Use Proxy HTTP request only available through proxy
HTTP HTTP 307 Temporary Redirect HTTP temporary redirect to URI
HTTP HTTP 308 Permanent Redirect HTTP permanent redirect to given URI
HTTP Timeout (> 30s) The page took too long to load and timed out.
HTTP HTTP Error 400 HTTP Server Error 400 Bad Request
HTTP HTTP Error 401 HTTP Server Error 401 Unauthorized
HTTP HTTP Error 403 HTTP Server Error 403 Forbidden
HTTP HTTP Error 404 HTTP Server Error 404 Not Found
HTTP HTTP Error 405 HTTP Server Error 405 Method Not Allowed
HTTP HTTP Error 406 HTTP Server Error 406 Not Acceptable
HTTP HTTP Error 407 HTTP Server Error 407 Proxy Authentication Required
HTTP HTTP Error 408 HTTP Server Error 408 Request Timeout
HTTP HTTP Error 500 HTTP Server Error 500 Internal Server Error
HTTP HTTP Error 502 HTTP Server Error 502 Bad Gateway
HTTP HTTP Error 503 HTTP Server Error 503 Service Unavailable
HTTP HTTP Error 504 HTTP Server Error 504 Gateway Timeout
HTTP HTTP Error 505 HTTP Server Error 505 HTTP Version Not Supported
HTTP No data from server No data received from server
HTTP Required string missing The required string was not found
HTTP Invalid HTTP response Invalid HTTP response received from server
HTTP Too many redirections Maximum redirection depth reached
HTTP Infinite redirection loop Redirection creates an infinite loop
HTTP SSL connection error Cannot make SSL connection - Error on receive
HTTP Timeout (> 30s) Socket timeout, unable to connect to server
HTTP Connection refused Connection refused by server
HTTP Unknown target The URL is invalid or the server was not found
HTTP Network error Network is unreachable
HTTP Network error No route to host
HTTP DNS error Temporary failure in name resolution
HTTP Connection reset Connection reset by peer
HTTP DNS error Non-recoverable failure in name resolution
HTTP Unknown target The URL is invalid or the server was not found
HTTP Unknown error Unknown internal error
HTTP Redirection error Could not find redirect location
HTTP SSL connection error Cannot make SSL connection - No data received from server
HTTP Connection reset Error on receive
HTTP Forbidden string found The string that should not exist on the page was found
HTTP HTTP Error 413 HTTP Server Error 413 Request Entity Too Large
HTTP HTTP Error 507 HTTP Server Error 507 Unexpected error
HTTP HTTP Error 520 HTTP Error 520

Ping status codes

Check Type Short Description Long Description
Ping Timeout Forced timeout
Ping Packet loss Packet loss occurred
Ping Unknown target Invalid hostname/address
Ping Timeout Time to live exceeded
Ping Network error Host Unreachable
Ping Unknown error Unknown internal error
Ping Timeout Ping timed out
Ping Network error Host not found
Ping Network error Multiple hosts responded
Ping Unknown error Unknown internal error
Ping Timeout Ping timed out
Ping Network error Port unreachable
Ping Unknown error Unknown internal error
Ping Timeout Forced timeout
Ping Packet loss Packet loss occurred

TCP Port status codes

Check Type Short Description Long Description
TCP Port Timeout (> 30s) The connection took too long to establish
TCP Port Unknown target Invalid hostname, address or socket
TCP Port Connection refused Connection refused by host
TCP Port Timeout (> 30s) Socket timeout
TCP Port Network error No route to host
TCP Port Network error Network is unreachable
TCP Port Unknown target Name or service not known
TCP Port Unknown target Servername was not provided or unknown
TCP Port DNS error Temporary failure in name resolution
TCP Port Connection reset Connection reset
TCP Port Invalid response Unexpected response from host/socket