Network Error

For every page that cannot be crawled successfully, a network error code is stored. This is only possible, if there are no network errors during crawling.

Source vs. Target Network Error

A network error can occur on both ends of a link, the source page/domain or the target page/domain or even both.

Network Error codes

The following network error codes are possible

Code	Network Error
-1	Socket Timeout Exception
-2	SSL Exception
-3	Protocol Exception
-4	Too Many Redirects
-5	Max Request Duration (timeout fetching the page)
-6	Unknown Host Exception (could not resolve IP address for host)
-21	SSL Exception with message “Could not generate DH keypair”
-99	Other network errors