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Another "can't connect to the Internet" question

T

Tullphan

Diamond Member
I'm working on a machine for a friend. It's a Dell Dimension 8550. While it says the LAN is connected, it won't connect to the internet.
Here's what i've tried so far:
Plugged the LAN cable directly into my cable modem
Installed a new LAN card
Disabled the firewall
Ran SuperAntispyware & Malwarebytes Anti-Malware (yes, it did find trojans...no, I didn't write down what they were
Tried doing a system restore, but it didn't like any of the dates I checked
Tried "obtain IP address automatically" & "use the following IP address"
Ran Winsock Fix
Any other ideas?
Thanks.
 
I read MS's help on unable to connect & it gave instructions about going into "ipconfig" & pinging the addresses that showed up, which I did successfully.
 
Your cable modem is probably set to work and authenticate with your computer's MAC address.

If you want to do Internet related technical activities get yourself a Wireless Cable/DSL Router (even if you have only one computer).

Otherwise the result would be that nothing would work.
 
I have a D-Link DI-524 hooked up to my cable modem.
I thought that might have been an issue...that's why I hooked it directly to my modem initially to rule that out.
 
First make sure that the computer can connect to the Router.

If it connected you should be capable to open from it the Router's menu. If you can not then you are not connected to the Router.

Maybe this can Help, http://www.ezlan.net/debug.html
 
Can I assume that, when I run ipconfig /all, & the pc shows the correct IP address for my router (192.168.0.1) & I can go into my router settings using that address, that it's connecting to my router?
 
Originally posted by: Tullphan
Can I assume that, when I run ipconfig /all, & the pc shows the correct IP address for my router (192.168.0.1) & I can go into my router settings using that address, that it's connecting to my router?
Click to expand...

Yes indeed, if you can access the router via its web interface then you have a TCP/IP running okay....

Its the internet connection I am buffled about, you said you have run winsock fix, so the only other thing I can think of is routing between the router and cable modem or DNS issues..
 
stop. the router carries a mac address. If it was plugged in, and it was up, thats what mac address is registered at the cable company. you will have to call them and get them to pull the mac address off of the router or computer that is plugged up to the modem in order to get internet.

my suggestion. put the router back on the cat 5 cable after the modem. see if it pulls an ip address from the modem. if it does, great. then its a set up issue in the router. ping the router. if you can ping the router, then that is great. ping 4.2.2.2 and see what you get.

if you get a reply you are on the internet. my guess is that you will still have to contact the cable company because you have jacked with the mac address set up.

my guess is that the router was not hooked up originally. the original network card had a mac address that was set up at the cable company. if you replaced it, then that gave it a new mac address. it is physically addressed to the card at build. you cannot change it. if you put the router in after the modem, then hooked that up to the computer with the new lan card, then the mac address is in the router, and it needs to be pulled from the cable company. whats on the pc side of the router doesnt matter at this point because it should default hand out dhcp and you should be able to pull a 192.168 ip address off of it without being hooked up the internet.

Look at it this way. The router is the gateway. not the modem. the modem is just part of the cable. The router does all of the work. The cable modem just hands the ip address to the router. The router then has a mac address given to it, and it is used at the cable company. The dhcp handed from the router to the pc is your business, not the cable companies.


Layout:

Internet
|
|
Splitter
|
|
|
212.143.143.12 (Real IP from ISP - sample)
|
Alcatel modem
|
10.0.0.138
|
|
|
10.0.0.1
|
PC1------------------Router / Switch-----------------PC4
192.168.0.101 / \ 192.168.0.104
/
/
| |
| |
| |
| |
PC2 PC3
192.168.0.102 192.168.0.103

1. The ADSL cable goes to the splitter.
2. The ADSL modem is connected to the splitter.
3. The Ethernet cable from the modem is connected to the router/switch.
4. All PC's are connected to the router/switch.

 
Here's what happened:
I've had this pc in before to work on & have had no trouble hooking it to my router & getting online, nor have I had trouble with any other PC I work on getting online.
I initially hooked it up to my router, to no avail. After trying different things while it was hooked into my router, that's when I did the things mentioned above.
I'll try a couple of other things before I call my cable compnay & see what the deal is.
 
If it has trojans, etc., why not just wipe out the OS and start new? That may fix the problem, or it may not, but at least it should eliminate the Trojans.
 
That's what I ended up doing.
I was just hoping to figure it out without having to do that in case it happened again.
 
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