Default Names, Addresses, and Passwords
For all LAN clients:
Base Station Password: public
Subnet Mask: 255.255.255.0
For wireless clients:
AirPort Network Name: Apple Network xxxxxx (see Note 1, below)
Network Password: None
As seen from wireless and wired LAN clients:
AirPort Base Station Name: Base Station
AirPort Base Station IP: 10.0.1.1
As seen from the WAN port:
AirPort Base Station Name: Base Station
AirPort Base Station IP: 192.42.249.13
or 169.254.x.x (Note 2)
Default Port Configurations
Ethernet (LAN): Configure via DHCP and network address translation (NAT)
Wireless: Configure via DHCP and network address translation (NAT)
Channel Frequency: 1
Encryption: Off
Closed network: Off
Station density: Low
Multicast rate: 2
Interference Robustness: Off
See Note 3.
For steps on how to reset the AirPort Base Station (Dual Ethernet) to the default state see technical document 106602:
AirPort Base Station (Dual Ethernet): How to Reset
Notes:
1. The characters "xxxxxx" represent the last six digits of the wireless Ethernet card's MAC address. See the AirPort ID number on the bottom of the base station.
2. The Configure via DHCP setting will obtain an IP address from your Internet service provider when DHCP is available to the base station. One of these two addresses is taken when DHCP service is not available. Base stations with firmware earlier than 4.0.4 take the former address. Base stations with firmware 4.0.4 or later use the latter, link-local address. The 169.254.x.x address is the same type used by Bonjour (formerly "Rendezvous") in Mac OS X 10.2 or later. Base station firmware 4.0.4 or later is provided with AirPort software version 2.0.4 or later. You can download firmware update 4.0.9 here. For more information on link-local addressing, see technical document 107225, "AirPort 2.0.4: About Using Link-Local Addressing".
3. The AirPort Base Station is set up properly out of the box (and after a forced reload) to work with a cable modem or DSL modem that obtains its IP information from a DHCP server. On the wireless side, it is set up as a DHCP server with network address translation (NAT) turned on and network encryption off. The default base station password is "public". If you are trying to use the AirPort Base Station in a Microsoft Windows environment, it may not be necessary for you to run the AirPort Setup Assistant. You need only plug in the base station and set up your Windows-compatible computer to access the base station.
4. Wireless Internet access requires an Internet service provider (fees may apply) and AirPort (or AirPort-compatible) wireless Ethernet card and base station. Some ISPs are not compatible with AirPort. For more information, see technical document 106590: "AirPort: Requirements for Wireless Internet Access"