Follow

What will trigger an outage in Pingdom?

One of our most read articles is “Why does Pingdom say my website is down when it’s not?” and it does a great job of explaining how Pingdom uptime checks work and why they alert you.

 

This is just meant as a simple overview of what types of errors a Pingdom Uptime check will detect and mark as an outage. Generally you can say that any site or server that doesn’t respond with a HTTP 200 OK or message that everything is good will throw an error in Pingdom.

 

This data is exactly what our probe servers will report in case they notice an error.

 

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

HTTP Custom

Status not OK

The status in the XML file was something other than OK

HTTP Custom

Unable to load XML file

The XML file could not be loaded

HTTP Custom

Invalid XML format

The XML file was not correctly formatted

HTTP Custom

Invalid XML format

The XML file was not correctly formatted

HTTP Custom

Invalid XML format

The XML file was not correctly formatted

HTTP Custom

No status in XML file

No status was defined in the XML file

HTTP Custom

No response time in XML file

No response time was defined in the XML file

HTTP Custom

Incorrect response time format

The response time in the XML file was not a number

IMAP

Timeout

Force timeout

IMAP

Timeout

Socket timeout

IMAP

Unknown target

Invalid hostname, address or socket

IMAP

Expected string missing

The expected string was not found

IMAP

Cannot make SSL connection

Cannot make SSL connection

IMAP

Connection refused

Connection refused

IMAP

No route to host

No route to host

Ping

Timeout

Forced timeout

Ping

Packet loss

Packet loss occured

Ping

Unknown target

Invalid hostname/address

Ping

Timeout

Time to live exceeded

Ping

Network error

Host Unreachable

Ping

Network error

Network 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

POP3

Timeout

Force timeout

POP3

Timeout

Socket timeout

POP3

Unknown target

Invalid hostname, address or socket

POP3

Expected string missing

The expected string was not found

POP3

Cannot make SSL connection

Cannot make SSL connection

POP3

Connection refused

Connection refused

POP3

No route to host

No route to host

POP3

No data received from host

No data received from host

SMTP

Timeout

Force timeout

SMTP

Timeout

Socket timeout

SMTP

Unknown target

Invalid hostname, address or socket

SMTP

Authentication not supported

Authentication not supported

SMTP

Authentication failed

Authentication failed

SMTP

Expected string missing

The expected string was not found

SMTP

TLS not supported

Target server does not support TLS

SMTP

Connection refused

Connection refused

SMTP

No route to host

No route to host

SMTP

Network is unreachable

Network is unreachable

SMTP

Service not known

Name or service not known

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 by peer

TCP Port

Invalid response

Unexpected response from host/socket

UDP

Timeout (> 30s)

Forced timeout

UDP

Unknown target

Invalid hostname, address or socket

UDP

Invalid response

Unexpected response from host/socket

UDP

Timeout (> 30s)

Socket timeout

UDP

No data received from host

No data received from host

DNS

Timeout

Force timeout

DNS

Timeout

Socket timeout

DNS

Expected IP not found

Expected IP not found

DNS

Unknown target

Invalid hostname

DNS

Domain not found

Domain not found by the nameserver

DNS

No IP address returned

The queried DNS server did not return an IP address

 

Was this article helpful?
1 out of 2 found this helpful