Use computer to handle all traffic from router?

[BlueChinchillaEatingDorito]

I'm in the midst of planning a little demo for kids about how unsafe WiFi could be (it's some kind of University studies fair our organization is doing). My plan is to run my own router mimicking the same SSID and password as our building WiFi to bait their devices to connect to a imposter network. Now I have a Java file that listens to a specific port and answers requests (basically a little HTTP server). Now I'm wondering, if I set that Java app set to listen on port 80 on a computer connected to my WiFi router where the Internet Modem should, would it receive any HTTP requests made by devices on my network? I'm thinking the lack of a DNS might make this whole idea fall apart. The router is not connected to the internet, just to my computer in this set up.

 

I want to reply to all HTTP requests with a simple response with the message body "You've been had".

[Wh0_Am_1]

11 minutes ago, BlueChinchillaEatingDorito said:

I'm in the midst of planning a little demo for kids about how unsafe WiFi could be (it's some kind of University studies fair our organization is doing). My plan is to run my own router mimicking the same SSID and password as our building WiFi to bait their devices to connect to a imposter network. Now I have a Java file that listens to a specific port and answers requests (basically a little HTTP server). Now I'm wondering, if I set that Java app set to listen on port 80 on a computer connected to my WiFi router where the Internet Modem should, would it receive any HTTP requests made by devices on my network? I'm thinking the lack of a DNS might make this whole idea fall apart. The router is not connected to the internet, just to my computer in this set up.

 

I want to reply to all HTTP requests with a simple response with the message body "You've been had".

I don't know how to do that, but here is another scary option.

 

[Wh0_Am_1]

18 minutes ago, BlueChinchillaEatingDorito said:

I'm in the midst of planning a little demo for kids about how unsafe WiFi could be (it's some kind of University studies fair our organization is doing). My plan is to run my own router mimicking the same SSID and password as our building WiFi to bait their devices to connect to a imposter network. Now I have a Java file that listens to a specific port and answers requests (basically a little HTTP server). Now I'm wondering, if I set that Java app set to listen on port 80 on a computer connected to my WiFi router where the Internet Modem should, would it receive any HTTP requests made by devices on my network? I'm thinking the lack of a DNS might make this whole idea fall apart. The router is not connected to the internet, just to my computer in this set up.

 

I want to reply to all HTTP requests with a simple response with the message body "You've been had".

Also for the DNS thing if you have an old android phone they have an app for that.

[Wh0_Am_1]

https://www.digitaltrends.com/mobile/how-to-make-an-android-server/

[Levisallanon]

you might want to look into this
https://www.wifipineapple.com/pages/software