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Should you block IP addresses?
Blocking IPs manually is generally an ineffective security tactic. Attackers generally cycle through IPs quickly and tend not to reuse them. Attacking IPs often belong to victims, so you risk blocking real users who want to access your website.
How can I tell if my IP address has been blocked?
If your IP address has been blacklisted and you want to investigate, you’ll need to visit the blacklist’s website and do a lookup on your IP address. Most blacklist databases will provide general listing reasons, but don’t list specific email addresses tied to blacklisted IP addresses.
Why is it ineffective to block IP adresses?
IP blocking is almost ineffective because it can be easily changed. If you block the user the attacker can easily disrupt part of the usability of your site by brute-forcing on other users or specific users to disable their accounts. I personally use a challenge system to cover both conditions Count the number of failed login attempts for IP
Is it possible to block authentification requests from specific IP address?
Is it possible somehow in office 365\\azure ad (without use of adfs, cloud-only environment) to block authentication requests from specific ip address (mean brut-force attacks) before asking credentials\\without account lockout. If it is not, where could I get official documentation about that.
How to correctly block IP adresses in Node JS Server App?
IP blocking is not the right way to prevent users after the number of incorrect logins. You can manage logs of failed logins for a user account and calculate how many failed attempts are done from the same IP within the last N minutes based on that you can temporarily Deactivate the account of the user.
Is there a way to block IP address in Office 365?
As much as I’d love to help, to my knowledge, it’s infeasible for Office 365 to block IP address before someone tries to enter the credentials and sign in Office 365. You can try to suggest the feature in Office 365 UserVoice website. The development team may consider it if your suggestion gets enough volume to votes.