Help network 2 computers via crossover cable w/ Att @home new settings

[Tycoonx]

Hi guys,

My network was working fine until ATT changed the cable modem to DHCP, instead of static address.
Here's my setup,

PC1 (gateway to the internet)
2 Network Cards
Nic1 goes to the cable modem
Nic2 goes to PC2

PC2
Nic3 connects to Nic2

I know, I know... I can throw away my nics and just get a router, but I got a bunch of NICS and crossover cables around, and I'm too cheap for a router.

So my question is how would I set up the DNS, Gateway srv for each one of the nics, so I can surf the web with 2 PC's?

Here was my previous setup which works before
PC1 (Gateway to the internet)
Nic1:
IP address 24.1.112.48
Subnet 255.255.255.0
Gateway 24.1.112.1
DNS 24.1.112.64 and 24.1.112.63

Nic2 goes to PC2:
IP address 192.168.0.1
Subnet 255.255.255.0
Gateway 24.1.112.48
DNS 24.1.112.64 and 24.1.112.63


PC2
1 Network Card
IP address 192.168.0.2
Subnet 255.255.255.0
Gateway 192.168.0.1
DNS 24.1.112.64 and 24.1.112.63

All these works fine with Static, but as soon as they moved to DHCP, my internet browsing capability is gone in my PC2 Machine.
So please help me with the settings below.

PC1 (Gateway to the internet)
Nic1
DHCP on everything

Nic2 goes to PC2:
IP address 192.168.0.1
Subnet 255.255.255.0
Gateway ?
DNS ?


PC2
1 Network Card
IP address 192.168.0.2
Subnet 255.255.255.0
Gateway ?
DNS ?

I got the gateway and DNS info of Nic1 (cable modem) from ipconfig and I tried using those for all of my dns and gateway servers across my Nics. My AIM, morpheus would work but I can't surf the web from my second PC. I know it has something to do with DNS server, so help me please!

Oh yeah what happens when I just staticly assign an IP address to my cable modem NIC? Would I be able to connect once they recycle all the Ip's address via DHCP?

 

[Poontos]

What OS and I guess you are not using ICS?

Anyway, on PC2, I think you should have the gateway and DNS set as 192.168.0.1 -- ugh, or 192.168.0.1 as the G-way and the DNS that is *inherited* via DHCP from the ISP, as the DNS IP of course for PC2.

A real mess if you ask me! Get a router!

 

[UncleWai]

same here, my internet sharing can't seem to work after changing to ATTBI.
I hope more people will post to tell us they have similar problems so i know this is not an isolated case.

 

[IgorTs]

Use Internet connection sharing ( ICS ). It will solve all the trouble.
If you're using win2k on first comp. in network properties,click on adapter connected to the net, sharing, than on another comp change proprties to use first one as a gateway( actually it already setup this way) exept on first one you do not specify gateway for second adapter, ICS will determine your external IP and set it as gateway for second comp automatically.
have a good one

 

[Fardringle]

AT&T did something sneaky with their new network to try and prevent us from using ICS without buying extra IP addresses. In Win2K, if you type ipconfig /all in a Command Prompt, you'll probably find that there are FOUR DNS server addresses listed for the cable modem connection. The third or fourth one is actually AT&T's DHCP server, so secondary computers on your network are being forwarded to AT&T DHPC service, which is preventing network access for them. To get around this, simply open TCP/IP properties for your cable modem, and manually enter the first two DNS addresses, which are the actual DNS servers...

This may not work for everyone, but it has worked so far for all 20+ people I have talked to here in the Salt Lake area...

 

[IgorTs]

I did not notice any problem with ATT ( just connected two friends yesterday). I usually assign DNS manually for secondary computers, so that problem does not appear.

 

[UncleWai]

thanks Fardringle, that helped me to give HTTP access for my secondary computer.
But my brother can't go to ICQ though.
can you think of a reason why?

 

[jclose]

You were hoping that other people would post about having the same problems? Well, I am one of those.

I was going along fine through Saturday, and then on Sunday the problems started. Lots of 'Cannot Connect to Server' kind of errors. And of course, surfing from my second computer wasn't working. (This is under XP and 98.) I would be able to surf for a few minutes and then the errors would start and it was no good from there on out. I found that, under XP, I could disable and then enable my network connection to get things going again, at least for a few more minutes. I haven't yet gotten ICS to work.

I got fed up with it and got on ATT's support pages. I went into a live chat session to get some answers. After waiting for hours (I started out at 1500th place in the queue - and there were other problems I ran into) I finally got a hold of someone. He wasn't exactly helpful. He did say that it was a known problem and that they hoped to have it fixed 'soon'. He couldn't, or wouldn't, clarify what soon was.

I wasn't satisfied and wouldn't go away; I kept asking him questions about the issue. He finally transfered me up to a technical support person. (Isn't that what the FIRST guy was??!) This second guy was much more helpful and full of information. Yes, it was a known problem and it was affecting lots of people. He said that about 1/3 of the trouble calls they were getting were concerning this problem, and about 500 tickets about this had been escalated to his level. He said that they had been told that the problem was caused by their new 12.xxx.xxx.xxx numbering scheme. (He did say that that explanation didn't make a whole lot of sense to him.) He also said that they hoped to have it fixed 'in a few weeks'!! Ack!! Let's see, what else...

His solutions: hardcode the DNS numbers in. He said that it wasn't apparently a fix all, but it seemed to help in some situations. These are the numbers that he gave me:

216.147.227.68
204.127.202.4
204.127.198.4
12.242.16.34

(Someone was mentioning that two of the four DNS servers were actually DHCP servers; do you know which of the two are which?) I haven't actually tried this yet (hardcoding the DNS servers); I just got this info last night and didn't have time between work and eating and sleeping and all that.

I actually saved the transcript; if anyone is interested in the whole verbiage of what was said, let me know. But I think I covered all the major points.

BTW, I saw somewhere on their website that if you experience a service interruption, to send them an email with the dates. They would reimburse you at a 2-for-1 rate. I don't know if they consider this a 'service interruption' or not, but I am going to try it. (Of course, it hasn't been solved just yet, either.)

 

[y2kcool]

I think I got the same problem. I just got cable internet and trying to run home network but not working.
Please help me to set it up. I got the router but I don't know how to setup. I've used to run ICS with hub only before.
Now I'm stuck with the new setup of ATT service.

 

[Fardringle]

My DHCP server is 12.242.19.34, so I would assume the last address on your list (12.242.16.34) is the DHCP server. My DNS servers are identical to the first two addresses on your list. Go ahead and use them.

The easiest way to find out is to go to a Command Prompt and type ipconfig /all. This will show you all important information about your network connections. Look specifically for a line labeled DHCP Server under the adapter attached to your modem. Normally, if you have DHPC enabled, the first two addresses listed for DNS servers will be the actual DNS servers, so you should be fine if you just use those two and ignore the other two.

 

[IgorTs]

Why not to use somebody else DNS?
pacbell:
206.13.28.12
206.13.29.12
206.13.31.12
Pick other providers DNS and enter to your TCP/IP properties and forget it.