2020-05-13 03:08:26 +00:00
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# Email notification for unknown sign-ins
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2020-06-01 18:08:07 +00:00
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> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/27211) in GitLab 13.0.
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2020-05-13 03:08:26 +00:00
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When a user successfully signs in from a previously unknown IP address,
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GitLab notifies the user by email. In this way, GitLab proactively alerts users of potentially
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malicious or unauthorized sign-ins.
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There are two methods used to identify a known sign-in:
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- Last sign-in IP: The current sign-in IP address is checked against the last sign-in
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IP address.
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- Current active sessions: If the user has an existing active session from the
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same IP address. See [Active Sessions](active_sessions.md).
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## Example email
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2020-06-01 18:08:07 +00:00
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![Unknown sign in email](./img/unknown_sign_in_email_v13_1.png)
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