added black-hole explanation

pull/152/head
Sascha Rommelfangen 2019-04-09 13:42:24 +02:00 committed by GitHub
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@ -200,6 +200,14 @@ Afterwards you'll find the csvimport from within the newly created event: "Popul
Don't use from the main site ("Import from...").
## Why do I see 'The request has been black-holed' when I submit forms?
That's a security measure for form tampering protection.
All forms have a timeout (~15min) and all of them can only be submitted once. If you use your browser's "back" button and resubmit the form MISP will consider it as a potential attempt at form tampering.
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