Wifi Hotspot with OpenWRT

How to create a transparent Wifi Hotspot using OpenWRT

Using for example an old TP-Link 781 that doesn't have enough memory to install the web graphic (Luci) interface : that why after a reset (push the reset button for 10 second while the router is on), http://192.168.1.1 give a "connexion refused". It's possible to activate the wifi hotspot "OpenWrt" with the Wifi ON / OFF Button

And later,

 opkg install luci

will fail with various problem (out of memory for example)

So we have to configure it threw ssh, to access it :

  ssh -o HostKeyAlgorithms=+ssh-rsa root@192.168.1.1

There is no root password after a reset

Then we would like to configure it as a transparent router : it won't give an IP to the LAN, the IPS Box will take care of that, to do it, follow this configuration https://openwrt.org/docs/guide-user/network/wifi/bridgedap

Disabling dnsmasq disable DHCP on the lan ports

It worked and again lost many packets, so Switch to trash !

The exmple of the TL-WR841NDv11 and the official page

A few ressources :

• https://deepwiki.com/openwrt/uci/3.1-command-line-interface
• https://forum.openwrt.org/t/how-to-disable-dhcp-dns-from-cli/223228

 Set new SSID	uci set wireless.@wifi-iface[0].ssid='new_ssid'
 Commit changes	uci commit
 Restart wireless interface	wifi

How to make a TL-WR841NDv11 work with a light openwrt

Flash 4Mo and RAM 32 Mo !

• https://openwrt.org/supported_devices/432_warning
• https://forum.openwrt.org/t/custom-builds-lede-v17-01-7-librecmc-v1-4-5-for-tp-link-wr740n-d-wr741n-d-wr841n-d-wr941n-d-all-versions/41652?u=tmomas
• https://u.pcloud.link/publink/show?code=kZqNwv7ZJXhIsAq7lqbxeOWaz04KYjqpnk9k