Not able to access web server on Raspberry pi on local network

Question

I am running a flask web server on raspberry pi 3 B+. I am able to access the page 192.168.4.1:5000 on the berry(chromium).

The same raspberry pi is also acting as a wireless LAN router. I am able to connect my other devices like ipad and phone to this wifi network. So there is no additional router in this network where I might need to do port forwarding.

Issue is, I am not able to access 192.168.4.1:5000 from any other device on this local network.

Please note that I am not using the ethernet port on the raspberry pi.

Please help!

are you able to ping the rpi ip from other devices? – Hsn Sep 07 '20 at 09:28 — Hsn, Sep 07 '20 at 09:28

score 1 · Answer 1 · answered Sep 07 '20 at 12:11

1

Okay so the solution was to add a route. I did sudo ip route add 192.168.4.0/24 via 192.168.4.1 dev wlan0

Now I am trying to figure out how to make this route persistent.

answered Sep 07 '20 at 12:11

Jessica

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null_override · Answer 2 · 2020-09-07T09:22:04.330

0

Use a port scanner to find the ip such as: Port Droid

You can also use NMAP for Windows or MacOS

You can also try this:

if __name__ == '__main__':
app.run(host='0.0.0.0')

It will make the server externally visible.

edited Sep 07 '20 at 09:22

answered Sep 07 '20 at 09:17

null_override

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3
10
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I know the IP.. Issue is non-connectivity – Jessica Sep 07 '20 at 09:20
I have done this already. In fact, the same python app is visible and accessible over the local network when hosted on a windows PC – Jessica Sep 07 '20 at 09:23
Sometimes the ip changes. So you can try running a network scan. – null_override Sep 07 '20 at 09:25
So I ran it and got the same IP. Do note that its a static IP. – Jessica Sep 07 '20 at 09:34
In that case... Can you ping the PI? – null_override Sep 07 '20 at 09:38
How to ping from iPad? – Jessica Sep 07 '20 at 09:44
I downloaded an app and tried to ping but it times out – Jessica Sep 07 '20 at 09:47
Try rebooting the PI – null_override Sep 07 '20 at 09:49
Done. Still not pinging. – Jessica Sep 07 '20 at 09:50
Check your Firewall – null_override Sep 07 '20 at 09:52
The rpi has no firewall installed – Jessica Sep 07 '20 at 09:52
Also i am not able to ping the ipad or my phone from rpi – Jessica Sep 07 '20 at 09:52
Can you use Internet using the PI's network? By firewall I have also meant Windows or PC's firewall. – null_override Sep 07 '20 at 09:57
Yes I am able to use the internet if ethernet cable is pligged in OR if I connect to the home WIFI – Jessica Sep 07 '20 at 09:58
I am using only my ipad and phone to connect to the Pi network so no firewalls involved – Jessica Sep 07 '20 at 09:59

Not able to access web server on Raspberry pi on local network

2 Answers2