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I am going to be staying in a hotel in the future, and I need to be able to use Ethernet devices there. The hotel provides free WiFi, however it has no way of providing Ethernet.

I have the idea of connecting to the free WiFi using a Raspberry Pi, and then pushing the internet connection out of the Ethernet port on the Pi.

This website seems to explain what I need to do, as does this post.

Everything seems fine here, apart from the bind addresses for the WiFi adapter. I don't know what IP addresses will be available on the WiFi network, and although I could put in a random ip address like 192.168.0.239, I don't know what range the network runs on either. It could be X.X.X.X, for example:

  • 192.168.0.X
  • 192.168.42.X
  • 10.0.2.X
  • 10.0.0.X

How can I make this set-up work without knowing any of the DHCP information beforehand?

Thank you for any responses.

Community
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DevelopedLogic
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3 Answers3

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Although it can be done with a Raspberry Pi I'd like to offer the D-Link N300 as an alternative solution. It is a range extender with in-built ethernet. I have this device and it works well for the low cost.

Andy Anderson
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To find your IP address on RPi, do the following:

In the command line, type:

ping google.com

Then press CTRL-C to stop. This is making sure you have a successful connection.

Now, type: 

ip addr

And you should see something like this:

pi@raspberrypi ~ $ ip addr
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
  link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
  inet 127.0.0.1/8 scope host lo
  2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
  link/ether b8:27:eb:8e:b7:42 brd ff:ff:ff:ff:ff:ff
  inet 192.168.1.17/24 brd 192.168.1.255 scope global eth0  
pi@raspberrypi ~ $

Your IP address is directly after the second inet (which is below link/ether). In this case, your IP would be 192.168.1.17.

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If you want to know the raspberry ip ,all you need to do is: On the Pi

ip a

Or from another device you need an app based on nmap or nmap itself and scan the network,for instance,if the subnet is 192.168.1.xxx , you can type

nmap -F 192.168.1.0/24

and finally,to setup an access point this page may help you.

abaddon s
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