Contents
Is CAPTCHA for DDoS?
CAPTCHA is used to mitigate DDoS attacks, as legitimate users are able to pass it, while attacking computers cannot. Nevertheless, CAPTCHA is not the most popular DDoS web challenge because it is very intrusive and has a negative effect itself.
How is DDoS attack mitigated?
Network administrators can also monitor network traffic to confirm the presence of an attack, identify the source, and mitigate the situation by applying firewall rules and possibly rerouting traffic through a DoS protection service.
When was recaptcha created?
May 27, 2007
reCAPTCHA
| Original author(s) | Luis von Ahn Ben Maurer Colin McMillen Harshad Bhujbal Manuel Blum |
|---|---|
| Developer(s) | |
| Initial release | May 27, 2007 |
| Type | Classic version: CAPTCHA New version: Behavioral analysis |
| Website | www.google.com/recaptcha |
Why does CAPTCHA service continue to run during DDoS attack?
Suppose an adversary performs excessive login attempts, leaving other users unable to log in; the service can require solving a CAPTCHA before logging in. But why, in this case, does the CAPTCHA service continue to run while the login service fails under the same traffic load?
Which is the most difficult DDoS attack to mitigate?
In these types of DDoS attacks, malicious traffic ( TCP / UDP) is used to flood the victim. Application-layer DDoS attacks are some of the most difficult attacks to mitigate against because they mimic human behavior as they interact with the user interface.
How does CAPTCHA solve the wrong problem for this?
CAPTCHA solves the wrong problem for this, and solves it badly. CAPTCHA does not try to rate-limit the connections; it is not intended to protect the login mechanism from attacks; it is not possible for CAPTCHA to differentiate between attackers and legitimate users.
How does CAPTCHA mitigate layer 7 type attacks?
Depending on your method of implementation simply just being able to differentiate robots from real users is completely adequate enough to mitigate a Layer 7 type attack, so long as you are hosting the CAPTCHA on a different machine/ip, you can then forward only the traffic that passed the captcha.