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DHCP problem? Can't connect to Internet, and wireless router....

By fenix3265 ·
I have 2 computers, one desktop that's hardwired to a linksys wireless router and a laptop that access it wirelessly

Lately my computer hasn't been able to connect to the router, but my laptop has been working just fine (internet and can access the router)

So I assigned a static IP to my desktop and it now can now ping the router and my laptop, but I still have no internet in my desktop.

I read somewhere that if this happens I might have a problem with the DHCP server.... Thing is I don't know how to access it and how to trouble shoot it...

thanks for your help

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Try this..

by thechamp_12 In reply to DHCP problem? Can't conne ...

You could try to re-download the wireless router connected to your PC with the modem, make sure you have the internet on the PC, dont connect the router until it tells you, so tka eoff the router, connect the modem to orignal PC as if you had no laptop. then download the router, and it'll tell you how to connect it to the computer. (I use belk54g and since all router use the same way to send wireless connection, after you've connected the router, then try it again, i had the same problem after i did this it fixed it all up and now i got 3 PC's wirelessly conected to one main PC.

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basics

by ismokedubs In reply to Try this..

first, try resetting the router to factory defaults, there should be a reset button on back.
next enter the router by typing the ip address of the default gateway in your web browser username/pass admin/admin. Now you should be able to configure and check settings if dhcp is working handing out addresses. you also may have a bad port, switch it to another. good luck!

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Check DNS server and subnet settings

by albert In reply to DHCP problem? Can't conne ...

I've encountered this once or twice in the past. If you statically assign the default gateway (router) as your DNS server, name resolution doesn't always work. So, even if you compare your laptop settings with your desktop, you might be puzzled. Because, when DHCP assigned your gateway (router) as the DNS server, there's no problem. I never figured that one out. This was a very rare occurrence, though.

If you still want to use Static assignments, and if you know your ISP's DNS server addresses, enter those under Preferred and Alternate DNS server instead. Of course, your router still needs to be the Default Gateway.

A long shot, but check the Subnet Mask. By any chance, is it:

255.255.255.252 ?

If so, guess what? There are no more addresses available in your subnetwork.

That last 252 means that a maximum of two devices, or hosts are allowed. That would be the router, then either your laptop or desktop. (Under certain circumstances, ping might still work, if I'm not mistaken.)

It looks like you didn't set up this router yourself. If your subnet was set up this way, it may have been done to limit the number of users that could connect as a security measure. You will need to reconfigure your router under its DHCP settings. If you change that last octet to 248, it will allow up to six hosts to connect. Also, check the start and ending addresses available for the DHCP server to assign. Make sure there are enough addresses in that range for the DHCP server to assign.

This is a very short list of some common subnet mask values:

255.255.255.0 :: up to 254 hosts
255.255.255.128 :: up to 126 hosts
255.255.255.192 :: up to 62 hosts
255.255.255.224 :: up to 30 hosts
255.255.255.240 :: up to 14 hosts
255.255.255.248 :: up to 6 hosts
255.255.255.252 :: up to 2 hosts

Speaking of security, you are using WPA or WPA2 with a strong password, right?

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Simple Solution to make Wireless Router connect to internet

by rommelsharma In reply to Check DNS server and subn ...

Hi,

Try the following:
(Basically we want to ensure that the default gateway ip address provided by your broadband ISP and the router ip address are NOT the same. If they are we change the IP address of router)

Connect your computer as usual to the regular DSL modem provided to you by your ISP.

Go to command prompt (Start-->Run-->type cmd in the box and enter)

on the command prompt, type

ipconfig

and enter.

Check the default gateway ip address:
It is most likely: 192.168.1.1

Note this down what ever it is.

Now connect your wireless router as given in instruction manual and go the the Router Access WebPage (The install CD provided will have the ip address to access the router, normally: http://192.168.1.1 will take you there).

Check the router IP address, through the web page.

If it is 192.168.1.1, change it to 192.168.2.1

Reboot the modem (power it down and up again).

Run the wireless router setup wizard and you should be connected this time.

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