I need to stop all activity on a Discourse instance in order to transfer everything over to a new instance. Any setting to do this quickly?
You can set it to read-only mode, that is a setting in the Admin Area (IIRC)
Muchos Gracias Senor
It is actually in the Admin > Backups area, not the Settings area.
That’s why I couldn’t find it! 
This is a good point, @zogstrip I think read only mode should also be available from the site settings, not just in the backup area…
Perhaps I can add this to @blake’s plate? We should have a site setting for this that works the same as the backup page button…
I pushed a commit for this:
我刚才在找这个设置但没找到。它现在作为管理员设置存在吗？
我的使用场景是：我想迁移我的网站，在过渡期间希望继续将旧实例用于邮件组收件箱，但暂时不允许用户登录。不确定该如何操作。
不是。这不是站点设置。“启用只读模式”仍位于 /admin/backups 下。
但邮件也无法生效。如果您仍希望允许群组收件箱使用邮件，但不允许发帖，则需要配置分类设置以禁用发帖功能。
谢谢！这是一个小型网站，我想我只要告诉大家不要登录就行了。