debian-mirror-gitlab/doc/user/admin_area/settings/sign_up_restrictions.md

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---
type: reference
---
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# Sign-up restrictions **(CORE ONLY)**
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You can use sign-up restrictions to require user email confirmation, as well as
to blacklist or whitelist email addresses belonging to specific domains.
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>**Note**: These restrictions are only applied during sign-up. An admin is
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able to add a user through the admin panel with a disallowed domain. Also
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note that the users can change their email addresses after signup to
disallowed domains.
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## Require email confirmation
You can send confirmation emails during sign-up and require that users confirm
their email address before they are allowed to sign in.
![Email confirmation](img/email_confirmation.png)
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## Whitelist email domains
> [Introduced][ce-598] in GitLab 7.11.0
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You can restrict users to only sign up using email addresses matching the given
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domains list.
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## Blacklist email domains
> [Introduced][ce-5259] in GitLab 8.10.
With this feature enabled, you can block email addresses of a specific domain
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from creating an account on your GitLab server. This is particularly useful
to prevent malicious users from creating spam accounts with disposable email
addresses.
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## Settings
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To access this feature:
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1. Navigate to the **Settings > General** in the Admin area.
1. Expand the **Sign-up restrictions** section.
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For the blacklist, you can enter the list manually or upload a `.txt` file that
contains list entries.
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For the whitelist, you must enter the list manually.
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Both the whitelist and blacklist accept wildcards. For example, you can use
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`*.company.com` to accept every `company.com` subdomain, or `*.io` to block all
domains ending in `.io`. Domains should be separated by a whitespace,
semicolon, comma, or a new line.
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![Domain Blacklist](img/domain_blacklist.png)
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[ce-5259]: https://gitlab.com/gitlab-org/gitlab-foss/merge_requests/5259
[ce-598]: https://gitlab.com/gitlab-org/gitlab-foss/merge_requests/598