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96 lines
4.2 KiB
Markdown
96 lines
4.2 KiB
Markdown
# Private, public, and web-public channels
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{!channels-intro.md!}
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{!channel-privacy-types.md!}
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In addition, you can configure the following permissions for each channel,
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regardless of its type:
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* [Who can send messages](/help/channel-posting-policy)
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* [Who can administer the channel](/help/configure-who-can-administer-a-channel)
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* [Who can subscribe themselves](/help/configure-who-can-subscribe)
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* [Who can subscribe anyone](/help/configure-who-can-invite-to-channels#configure-who-can-subscribe-anyone-to-a-specific-channel)
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* [Who can unsubscribe anyone](/help/configure-who-can-unsubscribe-others)
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For the organization as a whole, you can:
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* [Restrict channel creation](/help/configure-who-can-create-channels)
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* [Restrict who can subscribe others to channels](/help/configure-who-can-invite-to-channels#configure-who-can-subscribe-others-to-channels-in-general)
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Any permission, including whether a channel is private, public, or web-public,
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can be modified after the channel is created.
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## Private channels
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[Private channels](#private-channels) (indicated by <i class="zulip-icon
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zulip-icon-lock"></i>) are for conversations that should be visible to users who
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are specifically granted access. There are two types of private channels in
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Zulip:
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- In private channels with **shared history**, new subscribers can access the
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channel's full message history. For example, a newly added team member can get
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ramped up on a secret project by seeing prior discussions.
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- In private channels with **protected history**, new subscribers can only see
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messages sent after they join. For example, a new manager would not be able to
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see past discussions regarding their own hiring process or performance management.
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{!channel-admin-permissions.md!}
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Administrators can [export](/help/export-your-organization) messages in private
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channels only if [granted permission to do
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so](/help/export-your-organization#configure-whether-administrators-can-export-your-private-data)
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by a subscriber.
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Users who do not have special permissions (they are not organization
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administrators, and have not been granted access to channel metadata) cannot
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easily see which private channels exist. They can find out that a channel exists
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only by attempting to create a channel with the same name, if they have
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[permission to create channels](/help/configure-who-can-create-channels). They
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can't get any other information about private channels they are not subscribed
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to.
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!!! warn ""
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If you create a [bot](/help/bots-overview) that is allowed to read messages
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in a private channel (e.g., a **generic bot**, *not* an **incoming webhook bot**,
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which is more limited), an administrator can in theory gain access to messages
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in the channel by making themselves the bot's owner.
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## Public channels
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Public channels (indicated by <i class="zulip-icon
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zulip-icon-hashtag"></i>) are open to all members of your organization other than
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[guests](/help/guest-users). Anyone who is not a guest can:
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- See information about the channel, including its name, description, permission
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settings, and subscribers.
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- Subscribe or unsubscribe themselves to the channel.
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- See all messages and topics, whether or not they are subscribed.
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You can configure other permissions for public channels, such as [who is allowed
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to post](/help/channel-posting-policy).
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Guest users can't see public (or private) channels, unless they have been specifically
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subscribed to the channel.
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## Web-public channels
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{!web-public-channels-intro.md!}
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Web-public channels are indicated with a **globe** (<i class="zulip-icon
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zulip-icon-globe"></i>) icon.
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## Related articles
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* [User roles](/help/user-roles)
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* [Guest users](/help/guest-users)
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* [User groups](/help/user-groups)
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* [Public access option](/help/public-access-option)
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* [Channel posting policy](/help/channel-posting-policy)
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* [Restrict channel creation](/help/configure-who-can-create-channels)
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* [Configure who can administer a channel](/help/configure-who-can-administer-a-channel)
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* [Configure who can subscribe to a channel](/help/configure-who-can-subscribe)
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* [Configure who can subscribe other users to channels](/help/configure-who-can-invite-to-channels)
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* [Configure who can unsubscribe anyone](/help/configure-who-can-unsubscribe-others)
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