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Posted Jan 21, 2013
7:43:07 PM
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2Wire modem giving me wrong IP address
Edited by mzimmers on Jan 21, 2013 at 7:45:25 PM

Hi -

 

I don't know what I did to cause this, but one of the systems on my home network is no longer getting the 192.168.1.NNN IP address. Instead, I'm getting assigned my public IP address, which causes problems getting to this system from other machines on the network.

 

Any ideas? I've rebooted with no change in results. Thanks for any ideas.

 

EDIT: the system in question is a Mac, running 10.6. It's worked with 2Wire for ages.

Hi -

 

I don't know what I did to cause this, but one of the systems on my home network is no longer getting the 192.168.1.NNN IP address. Instead, I'm getting assigned my public IP address, which causes problems getting to this system from other machines on the network.

 

Any ideas? I've rebooted with no change in results. Thanks for any ideas.

 

EDIT: the system in question is a Mac, running 10.6. It's worked with 2Wire for ages.

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Jan 22, 2013 6:28:21 AM
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Professor
IPtables is used by linux systems such as MacOS for how it handles firewall, etc. Now the other thing I can think of is that computer got placed into DMZPlus on the 2wire device.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________
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2Wire modem giving me wrong IP address

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Jan 22, 2013 5:49:47 AM
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ACE - Master

What modem do you have?

"If you find this post helpful and it solved your issue please mark it as a solution.  This will help other forum members locate it and will also let everyone know that it corrected your problem. If they have the same issue they will know how to solve theirs"

What modem do you have?

"If you find this post helpful and it solved your issue please mark it as a solution.  This will help other forum members locate it and will also let everyone know that it corrected your problem. If they have the same issue they will know how to solve theirs"

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.

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Jan 22, 2013 5:55:00 AM
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Professor
What do you mean Public IP address? You are not using a Time Capsule behind the 2Wire per chance, are you?
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________
What do you mean Public IP address? You are not using a Time Capsule behind the 2Wire per chance, are you?
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________

Re: 2Wire modem giving me wrong IP address

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Jan 22, 2013 6:02:16 AM
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Teacher

2Wire modem.

 

By "public IP," I mean that it's the broadband IP address (in my case, 75.NN.NN.NN), not a 192.168.1.NN.

 

No, no time capsule.

2Wire modem.

 

By "public IP," I mean that it's the broadband IP address (in my case, 75.NN.NN.NN), not a 192.168.1.NN.

 

No, no time capsule.

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Jan 22, 2013 6:07:24 AM
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Professor
Then it may be a issue with the IPTables on your computer, not with the router. What 2wire modem do you have?
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________
Then it may be a issue with the IPTables on your computer, not with the router. What 2wire modem do you have?
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________

Re: 2Wire modem giving me wrong IP address

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Jan 22, 2013 6:14:52 AM
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Teacher

The model on the front says "3801HGV."

 

What/where are the IP tables? That's not a term I'm familiar with.

 

And, again, all the other devices on the network have "good" addresses.

The model on the front says "3801HGV."

 

What/where are the IP tables? That's not a term I'm familiar with.

 

And, again, all the other devices on the network have "good" addresses.

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Jan 22, 2013 6:28:21 AM
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Professor
IPtables is used by linux systems such as MacOS for how it handles firewall, etc. Now the other thing I can think of is that computer got placed into DMZPlus on the 2wire device.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________
IPtables is used by linux systems such as MacOS for how it handles firewall, etc. Now the other thing I can think of is that computer got placed into DMZPlus on the 2wire device.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________

Re: 2Wire modem giving me wrong IP address

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Jan 22, 2013 6:42:26 AM
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Teacher

It was in fact in DMZPlus. I just changed that (hopefully I can live with that change) and renewed my DHCP lease, and I now have a good address! Thank you so much.

 

A couple of post-mortem questions, please:

 

1. why does DMZPlus affect this?

2. why didn't it affect the other systems on the network?

3. is returning to maximum protection going to affect my ability to file share within the network, or does it just effect traffic outside my LAN?

 

 

It was in fact in DMZPlus. I just changed that (hopefully I can live with that change) and renewed my DHCP lease, and I now have a good address! Thank you so much.

 

A couple of post-mortem questions, please:

 

1. why does DMZPlus affect this?

2. why didn't it affect the other systems on the network?

3. is returning to maximum protection going to affect my ability to file share within the network, or does it just effect traffic outside my LAN?

 

 

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Jan 22, 2013 7:01:18 AM
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1. All inbound traffic, except traffic which has been specifically assigned to another computer using the "Allow individual applications" feature, will automatically be directed to this computer. The DMZplus-enabled computer is less secure because all unassigned firewall ports are opened for that computer.

Note: Once DMZplus mode is selected and you click save, the system will issue a new IP address to the selected computer. The computer must be set to DHCP mode to receive the new IP address from the system, and you must reboot the computer. If you are changing DMZplus mode from one computer to another computer, you must reboot both computers. The new IP address you aquire is the RG's public IP address so it can be seen to the outside world.

2. Other systems simply have a 192.168.1.x IP (unless otherwise specified) and communicate with the RG as normal.

3. It will not affect your sharing speeds on the LAN, simply from the LAN to the WAN and vice-versa.
1. All inbound traffic, except traffic which has been specifically assigned to another computer using the "Allow individual applications" feature, will automatically be directed to this computer. The DMZplus-enabled computer is less secure because all unassigned firewall ports are opened for that computer.

Note: Once DMZplus mode is selected and you click save, the system will issue a new IP address to the selected computer. The computer must be set to DHCP mode to receive the new IP address from the system, and you must reboot the computer. If you are changing DMZplus mode from one computer to another computer, you must reboot both computers. The new IP address you aquire is the RG's public IP address so it can be seen to the outside world.

2. Other systems simply have a 192.168.1.x IP (unless otherwise specified) and communicate with the RG as normal.

3. It will not affect your sharing speeds on the LAN, simply from the LAN to the WAN and vice-versa.

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Jan 22, 2013 7:01:35 AM
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Professor
dmzplus basicilly opens the firewall for a device.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________
dmzplus basicilly opens the firewall for a device.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________

Re: 2Wire modem giving me wrong IP address

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Jan 22, 2013 7:11:49 AM
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Teacher

Hi, bauwls...thanks for the reply. I think a minor correction is in order: on the Mac, I don't have to reboot; I can just renew the DHCP lease (at least that worked this time).

 

So, if no computer has DMZplus enabled, does that mean that the 2Wire does all the routing itself? I'm still trying to grasp the concept/benefit here.

Hi, bauwls...thanks for the reply. I think a minor correction is in order: on the Mac, I don't have to reboot; I can just renew the DHCP lease (at least that worked this time).

 

So, if no computer has DMZplus enabled, does that mean that the 2Wire does all the routing itself? I'm still trying to grasp the concept/benefit here.

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Jan 22, 2013 7:59:28 AM
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Professor
For the private Lan. Otherwise the computer is doing the routing. That is where IPtables comes into play. For more info, you can do a search on the web regarding.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________
For the private Lan. Otherwise the computer is doing the routing. That is where IPtables comes into play. For more info, you can do a search on the web regarding.
________________________________________________________________

"Ren: Now listen, Cadet. I've got a job for you. See this button? Don't touch it! It's the History Eraser button, you fool!

Stimpy: So what'll happen?

Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?"
________________________________________________________________

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