I designed a website for my office (I am heading Business Analytics in ZTBL) where I present analytics/reports/dashboardsKPIs etc. and it is accassible over LAN. So, I got an idea and designed a LAN based Whatsapp like app. Works like whatsapp, looks and felt like whatsapp but data does not leave your organization. Instead of phone number, this one uses ip address as unique id.
Then I went one step ahead, and added video conferencing features as well. Now users can create rooms, with or without password, and other users on the same Local Area Network other users can join video conferences. Embeded the application in my Business Anlytics portal and it works flawlessly.
Then I went on and added the screen sharing feature as well. And now it is full fledge replacement of zoom or similar applications. Works great on LAN, data does not leave your organization. Does not require any third party tool or even internet itself.
It is a simple standalone 56kb aspx page. It does not need websockets, so you just have to enable IIS and .NET 4.8. Then place this aspx page in wwwroot, or any folder inside wwwroot. You can embed this page in any other site as well. If you are using IP address and not named server, you will need to enable “insecure origins treated as secure” or equavelent in Edge. That is browser problem, not the app problem. If you have named server, this step is not required. Oh and you need https, but self signed certificate does work.
Currently IP address is being used as id and if a person saves their name, that appears on their past chats as well and obviously future too. It can be changed at any time after which the same appears on past and future chats and in video conferencing. However, if you want, you can change few lines, and get user name directly from them by enabling windows integrated security (or something similar). I wanted it to be accissable without user id and password, so I did not use that feature intentionally.
Download LANCom: https://drive.google.com/file/d/1LQYYw_5e5SQ8y17iefCL9ELtPPeVIrYO/view?usp=sharing