Years ago, I used a Linksys WRT54G in client mode to connect an ethernet-only DirecTV box. This week I again had an scenario perfect for the open source firmware.
My daughter’s Macbook went to Valhalla the other day.
No problem. We’ll switch her over to the old Mac Pro. The one without wireless… In her room on the side of the house without any network cables… DD-WRT to the rescue.
Two options are available in the DD-WRT firmware to bridge these networks:
Client mode. This mode involves a bit of routing. The WAN interface is assigned an IP on the main network, while the switch ports have to be placed on a secondary subnet. Not a huge deal breaker, but Bonjour services are notoriously adverse to subnet-hopping.
Client Bridge mode. The behavior with this option is most similar to using an add on wireless adapter. The client router associates to the SSID of the wireless network. Any devices connected to the ethernet ports on the client bridge receive a DHCP address directly from the main access point. This allows a flat subnet.
The drawback with this is that the client bridge AP doesn’t receive an address itself. The web interface is then unavailable.
Client bridged mode did the trick. Now my daughter is the proud custodian of an aging Mac Pro tower and I don’t have the hassle of administering an additional subnet just for her room.