Re: Router as an Access Point?

• From: Jeff Liebermann <jeffl@xxxxxxxxxxxxxxxxxxxxxx>
• Date: Tue, 31 Jan 2006 16:14:08 -0800

jens_jansson@xxxxxxxx hath wroth:

>Is it possible to use a router as an Access Point?

Yes.

>I have 100 mbit broadband (no modem or such) one point (soccet) with 5
>dynamic public IP addresses from my ISP.

Access points work on MAC address layer and know nothing about IP
addresses.   The only thing the IP address in an access point does is
help with the web based setup and management.  If you plug a typical
access point into your 5 IP address connection, you'll have all 5 IP
addresses available at the client computers.

>I want both my computers (one connected wireless to my router, the
>other one connected by wire) to use public IP's.
>As it is now I can only get it to work when using the router to supply
>DHCP and thereby recieving private IP's for both computers.

In theory, your ISP's DHCP server is smart enough to know if an IP
address has been issued to you and to not re-use it until the lease
has expired or until it's released.  Therefore, you should be able to
plug in both computahs, set them for DHCP clients, and your ISP should
issue each one a different IP address.

>I have a Dlink 524, (4lan ports 1wan and 6wirelss)

Well, we have a problem here.  Because your IP's are dynamic and not
static, and because the DI-524 does NOT have a DHCP client on the LAN
side, you will not be able to have the LAN IP address of the DI-524
automagically configured.  You'll need to configure your DI-524
offline, with just a single PC plugged in, and then lose control when
connected to the 100Mbits/sec connection.  Basically, you setup:
1.  Nothing goes to the WAN port.  Do NOT plug DI-524 into enything
other than the PC being used to configure it until last step.
2.  Leave the IP address at the default (192.168.0.1).
3.  After you have all the wireless stuff setup and working, disable
the DHCP server.  If you need to do furthur configuration, you'll need
to setup your windows client for a temporary static IP address of:
    IP = 192.168.0.5
    NM = 255.255.255.0
    GW = None
    DNS= None
This will get you back to the configuration screens.
4.  Finally, connect a cable beween one of the LAN ports on the DI-524
and what I guess you have a 100baseT switch.  You may need a reverse
ethernet cable.  Check the lights on the front of the switch and
DI-524.  If they light up, you win.  If not, build a crossover cable.
If you plug this cable in while configurating the router, and you have
the client computer set to DCHP, you will lose your connection to the
rotuer configuration.

>I've tried to connect the "internet" to one of the lan ports, and that
>proved sucessfull when using the non wireless ports...but the wireless
>network in the browser do not seem able to pass on DHCP information
>from the ISP.
>
>any suggestions?
>do i need to buy an extra AP?

-- 
Jeff Liebermann     jeffl@xxxxxxxxxxxxxxxxxxxxxx
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558
.

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