Routers and Wireless Access Points

Revision as of 09:07, 3 November 2008 by Petar Mitrevski (talk | contribs)

Routers and Airport wireless devices need to be configured by us for two main reasons:

  • We need to register them manually.
  • DHCP must be turned off so that the router is not assigning private IP addresses to its computers. The "router" part of the router or Airport must be disabled so that it functions only as a wireless access point, this is also called "Bridge" mode.
  • What we want to avoid is a situation where the router acts as a DHCP server, taking the place of Middlebury's DHCP server. Computers at Middlebury College need to have addresses assigned by the Middlebury College DHCP server for a number of reasons.


Wireless Access Point Configuration Guidelines

  1. WAP delivered to helpdesk (w/ documentation, by owner, do not check devices in, configure them with the owner –see below)
    1. (note that Apple AirPort WAPs should be configure with Apple's AirPort Setup Assistant or AirPort Utility - these can be installed with the CD that came with the WAP or by using the Helpdesk iMac which has them in the /Applications/Utilities folder)
  2. Connect to WAP w/ HD computer (via Ethernet cable – use switch ports, NOT internet, uplink or WAN port)
  3. Browse to the WAP – http://ip_address_of_wap (ipconfig from computer will provide default gateway = WAP address )
    1. Logging in will depend on make/model of the device, use the documentation or try a Google search to find default username/password
    2. The IP address of the WAP is usually (but not always)
  1. Configure WAP:
    1. Disable DHCP (note that once this happens you will need to RESET the AP to configure it again)
    2. Set SSID to username
    3. Enable WEP or WPA (user sets password – can be shared)
    4. Admin Password for WAP (user sets password – not to be shared)
  1. Test WAP (connect WAP to network jack, connect a computer wirelessly, confirm 140.233.x.x IP address for computer)
  2. Tape Label on WAP (SSID=username; IP Address of WAP – from step 3; and tape over WAN/uplink port)

If for some reason you need to reset the AP, look for a small button labeled "RESET". Note that resetting the AP will usually undo all the steps that were done before, including erasing any passwords that were set. Consult Google or the AP's documentation for more details on how to reset an AP.


  1. Turn on MacBook. Plug airport in via Eth downlink to computer, then plug in power but do NOT plug in WAN uplink.
  2. Check network settings to ensure that computer is getting connectivity via Eth port, but the address should be 192... or 169..., not 140.233.... That means that the Airport router is working and isn't connected to the wider internet.
  3. Open utilities -> Airport Setup Utility (CD in Helpdesk if not auto installed). ASU should detect your Airport after some searching.
  4. Enter "Manual Setup" and configure the Airport accordingly: register according to MAC address, DHCP should be off...
  1. Unplug power from the Airport, plug in Eth from WAN network, plug back in. If settings are correct, when the airport reinitializes, it should get a 140.233 address and the computer connected to it should also get a 140.233 address (while connected by wire).
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