Ethernet to Wireless

The purpose of this setup is to share an Ethernet internet connection over a wireless hotspot, enabling other devices to access the internet via the Wireless hotspot created on Mecha Comet.

Prerequisites

• Ensure nmcli and nftables are installed on Mecha Comet.
• Replace wlan0 and end0 with your actual Wireless interface and outbound network interface names.
• Ensure mecha comet is connected to the Ethernet network.

Steps

1

Create a Wireless Hotspot

$ sudo nmcli device wifi hotspot \
  ifname <wireless-interface> \
  con-name <connection-name> \
  ssid <ssid-name> \
  password "<password>"

Replace the placeholders:

<wireless-interface>: Your Wireless interface name (e.g., wlan0). <connection-name>: Desired connection name (e.g., comet-hotspot). <ssid-name>: Desired hotspot name (e.g., CometHotspot). <password>: Desired password for the hotspot.

2

Configure IPv4 Method to Shared

$ sudo nmcli connection modify <connection-name> ipv4.method shared

3

Bring Up the Hotspot Connection

$ sudo nmcli connection up <connection-name>

4

Configure NAT with nftables

Create a NAT Table

$ sudo nft add table ip nat

Add a NAT Chain

$ sudo nft add chain ip nat POSTROUTING { type nat hook postrouting priority 100 \; }

Add a Masquerade Rule

$ sudo nft add rule ip nat POSTROUTING oif "end0" masquerade

Verification

Check the Hotspot Status

$ nmcli device status

Verify nftables Rules

$ sudo nft list table ip nat

Notes

• Replace interface names (wlan0, end0) as needed for your setup.
• This setup assumes the Mecha Comet's outbound interface is end0. Adjust accordingly.

Troubleshooting

• If the hotspot fails to start, ensure the Wireless adapter is not connected to another network.
• Verify that nftables is enabled and properly configured. By following these steps, you should now have a functioning Wireless hotspot with NAT configured. 🎉