firefighter

Hello

I am not sure if this is the right area to post this question but it seemed the most suiting, if it belongs somewhere else i'm happy to repost elsewhere.

I'm looking for a wiki site that can be password protected so that only people with access can view or edit it.

I am also hoping for a piece of software that lets you work on the wiki offline and then synchronize when you have internet access.

I am aware of offline wiki software and password protected wikis but i've yet to discover any software or site that can sync or do all of these.

Thank you for your help