<!DOCTYPE html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body> Hi, a technical question: I'd like to build a router on a machine with four ethernet and one wlan adapter, using Ubuntu 24.04 server, coming with 255.4-1ubuntu8.6. I need to build a bridge with two of the ethernets and the wlan as an accesspoint, making use of as much default software as possible, i.e. systemd, networkd, netplan. Problem: It's easy to configure the wlan adapter as a client and put it in a bridge, but not as an access point. First attempt, straight forward, /etc/netplan/60-bridge-lan.yaml <pre wrap="" class="moz-quote-pre"> network: version: 2 renderer: networkd ethernets: enp4s0: dhcp4: no enp5s0: dhcp4: no wifis: wlp1s0: dhcp4: no access-points: "hurra": mode: ap password: something bridges: lan: dhcp4: no addresses: - "192.168.122.1/24" - <a class="moz-txt-link-rfc2396E" href="fdfc:1234:5678:1234::1/24">"fdfc:1234:5678:1234::1/24"</a> interfaces: - enp4s0 - enp5s0 - wlp1s0 doesn't work: ERROR: wlp1s0: hurra: networkd does not support this wifi mode Second attempt, doing as many websites propose, running the wlan with hostapd and using it as a regular ethernet, i.e. removing the wifis section and using instead ethernets: enp4s0: dhcp4: no enp5s0: dhcp4: no wlp1s0: dhcp4: no doesn't work either. Error message 2025-04-11T14:11:29.023613+00:00 mini20 systemd-networkd[1281]: wlp1s0: Failed to set master interface: Device does not allow enslaving to a bridge. Operation not supported which is clearly wrong, since a manual brctl addif lan wlp1s0 works properly Third attempt, not configuring the wifi with netplan at all, just listing it as a bridge interface, results in # networkctl IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier unmanaged 2 enp3s0 ether routable configured 3 enp4s0 ether enslaved configured 4 enp5s0 ether no-carrier configured 5 enp6s0 ether off unmanaged 6 wlp1s0 wlan degraded unmanaged 7 lan bridge routable configured man pages systemd.netdev and systemd.network don't help either. So my question is: What is the correct and supposed way to build a bridge interface with ethernets and a wifi access point with systemd and networkd? Thank you and best regards Hadmut </pre> </body> </html>