TC behind modem with DMZ

I have a new modem/router from my ISP which does not let me change the DNS anymore. As I do not want the standard DNS provided by the ISP and I do not want to set the required DNS on each connected device I thought to use the TC as the router instead of keep running it in "bridged mode". The modem allows me to set a DMZ to a defined machine, port forwarding or the use of DYNDNS. To make the situation a bit more complicated one of the devices, an IP TV set top box needs to be connected directly to the modem due to IMPG issues.
I have been selecting DMZ:
Then I gave the TC the static IP 192.168.1.10 and the required DNS:
And selected a range of IP addresses:
I can only select DHCP only. As soon as I try to set DHCP and NAT, I get an error message:
The setup does work but I am really not sure what kind of implications this has. Is the modem still providing NAT? Is my network now open and unprotected?
Thank you very much for some insight and suggestions.

The setup does work but I am really not sure what kind of implications this has. Is the modem still providing NAT? Is my network now open and unprotected?
Yes, the modem is still the router.
This is in fact the best setup.. what you are doing is using the TC as a secondary DHCP server. There is no need to even use DMZ.. it does not block in any way packets from internet.
Your network is not open.. it is behind a NAT router same as it was.
I use exactly the same setup to provide DNS alternatives to my clients.. same as what you are doing.

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Want to push my home network behind a WRVS4400N DMZ

Hello all,
     I've got a pretty typical setup with my DSL modem hooked to my WRT54GS, which is the gateway for my home network, both wired and not.   I have received a block of static IP's from my ISP and I now want to build a DMZ in "front" of my home network. Here's what I envision:
        Internet
            |
        DSL Modem
            |
        WRVS4400N V.2 (no NAT, no DHCP, intrusion detection and firewall only) static IP on both sides of the router
            |
         DMZ (all static IP)
            |
        WRT54GS (static IP facing the DMZ, NAT, DHCP, etc behind the router)
Does this look like a good design? Is there anything I need to watch for to "push" my current home lan behind my new DMZ? I'll have wireless (3 different SSID's) at each router (including the DSL modem which will have firewall, nat, etc turned off).
Thanks for the help.
     - Jeff

Jeff based on your description and setup diagram that looks just fine. With the wrt54g on the dmz with the firewall on you will be just fine.

Want to put my WRT54GS behind a WRVS4400N DMZ

Hello all,
   I've got a pretty typical setup with my DSL modem hooked to my WRT54GS, which is the gateway for my home network, both wired and not. I have received a block of static IP's from my ISP and I now want to build a DMZ in "front" of my home network. Here's what I envision:
Internet
|
DSL Modem
|
WRVS4400N V.2 (no NAT, no DHCP, intrusion detection and firewall only) static IP on both sides of the router
|
   DMZ (all static IP)
|
WRT54GS (static IP facing the DMS, NAT, DHCP, etc behind the router)
Does this look like a good design? Is there anything I need to watch for to "push" my current home lan behind my new DMZ?
Thanks for the help.
   - Jeff

OK, I have a complication (I used to know this stuff, really....) I started mapping out the IP networks and started to configure the WRVS4400N and got lost.
My ISP gave me a block of static IP's - say 1.2.3.4-19 (16 block). They reserve 3, so I get to use 13.
1.2.3.4 is reserved (probably for their router)
1.2.3.19 is reserved for broadcast
1.2.3.18 is reserved for gateway.
So I tried to set up the 4400N last night and got stuck setting up the routing. Here's a diagram:
     DSL Modem - 1.2.3.4 (internal) - this is an Actiontec GT701-WG - could be replaced with any DSL modem/router
              | 1.2.3.18 (gateway)
              |
              | (1.2.3.5 Wan port)
    WRVS4400N - no dhcp, no nat (in router state not gateway), Intrusion and Firewall on - 1.2.3.6 internal
              | (1.2.3.7 Lan port)
              |
              |------------------------------------------this is where I want to put 1.2.3.8-16 (servers)
              |
              | 1.2.3.17 (Wan Address)
     WRT54GS - almost default setup
              | 192.168.1.1
              |
(Home Network)
The problem I have is that I don't get to pick the IP's that are reserved on the actiontec, and they encompass the entire IP range I've been given. I want the protection of the 4400 for my servers, but I don't see how to build a route table to form a separate cloud of 1.2.3.5-17. It's like I'm cascading three routers over only two IP ranges. Splitting the 1.2.3.x ip range into two subnets doesn't seem to work since the isp grabs both the top and the bottom of the range.
Can someone help me with the details of setting something like this up?
....Alternatively, the reason I am looking to do this is that I want to protect my home net, offer web services from my DMZ, yet be able to let my home net access dmz servers without going out and back in via the internet. I could set up two VLAN's, one for home, one for the DMZ, both using NAT on two different IP ranges (giving me 3), but I have two problems - I have several servers that I need to service internet requests (not just one DMZ PC) and I want to access the DMZ from the home net directly. If I set inter-VLAN routing on, I think I'm giving a channel for a hacker to get to my home net.
So I'd be open to any alternatives. Functionally, I don't think what I want to do is hard, but getting into the weeds of configuration has my head spinning.
Thanks again for all the help, it is very much appreciated.
    - Jeff

Westell ProLine 6100 DSL modem with generic wireless router

I am planning to purchase the Starter Verizon high speed internet plan. It comes with a free Westell ProLine 6100/6110 DSL modem. The combined modem and wireless router is $55. I have a wireless router (Linksys and Cisco). Can I use the Linksys or Cisco wireless router with the Westell ProLine DSL modem, or will I have compatibility problems? Thanks.

To use that modem with a router, I point to:
URL: http://www.dslreports.com/faq/13600
Location: All DSLR (dslreports.com) FAQs » Verizon Online DSL FAQ » Hardware » How do I use a router with the Westell 6100?
^^
Otherwise, you will...
#1 NOT be able to go anywhere online because of Double NAT.
#2 Or if you can go some where online then..
..For example: If you want to allow users from the net to connect to your computer, you can't just portforward in your generic wireless router. You must also portforward in the Westell 6100. (Called Double NAT Forwarding)
Points to: portforward.com -> Other Guides -> Port Forwarding Behind Two Routers?
^^
I will leave this up to you on what you want to do. Good luck.
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How do I use a Netgear CM400 cable modem with my Time Capsule router?

I switched out my TWC modem for one I bought. I called and activated a CM400 Netgear modem with time Warner cable. They said it is activated and responding. My time capsule is on a green solid light but i can't connect to the Internet! Why??

Your previous setup may have been a modem router and the TC is connected in the wrong mode.. it should be dhcp and nat with a pure cable modem.. is it?
You also might need to put the TC into the correct mode.. then power off the modem for about 15min.. (try 5min first).. power up the modem.. wait 5min and then power up the TC .. it should grab the public IP and route that to the network.. reboot all the clients so they get fresh connection and see if that works.
If not give us a few screenshots from the airport utility of how the TC is setup.

I just set up the airport wireless modem - with a comcast internet router - all wireless device connect seemlessly (3 Iphones, Mac Air, and a Sony Laptop) but my IPAD 1 no longer connects. It tries to but never connects. I have reset it and have utility

I just set up the airport wireless modem - with a comcast internet router - all wireless device connect seemlessly (3 Iphones, Mac Air, and a Sony Laptop) but my IPAD 1 no longer connects. It tries to but never connects. I have reset it and have airprot utility app downloaded on my IPAD - it shows the modem and the internet no connected?

Do you mean an Airport Extreme Base Station connected to a Comcast Modem?

Xfintity router/modem with Airport extreme moderate/strict nat?

I switched to comcast xfinity and they gave me a modem with a router built in and we are trying to use the Airport Extreme to get better signal using Bridge Mode in Airport Utility. It all worked fine but then on my PS3 and Xbox 360 it says that I have a moderate/strict nat type any help on how to get a open nat?

Suggest that you double check to make sure that the AirPort Extreme is setup in Bridge Mode.
Open AirPort Utility - click Manual Setup
Click the Internet icon
Settings should look like this:
Connect Using = Ethernet
Connection Sharing = Off (Bridge Mode)
Update to save any changes
When the AirPort Extreme is in Bridge Mode, DHCP and NAT are turned off.
These services are being provided by the Comcast gateway, so any NAT issues rest with the Comcast gateway. You may need to call Comcast support to ask them about changing the NAT settings on the device.

HT5569 Hi is it possible to install and setup a modem with an iPad only, I would appreciate an answer to this question thanks

Hi is it possible to install and setup a modem with an iPad only, I would appreciate an answer to this question thanks

The configuration page of my router on Safari (tap to enlarge)
See IP Adress at the top (center)

I get the following error message when I connect a usb ethernet adapter to my new MacBook Pro: Unsupported - You cannot use an Apple USB Modem with this computer. I live were we only have dial-up and the Apple Store said this is what I need.

I get the following error message when I connect a usb ethernet adapter to my new MacBook Pro: Unsupported - You cannot use an Apple USB Modem with this computer. I live where we only have dial-up and the Apple Store said this is what I need. In addition, when I connect the phone to the connecter it falls out, it will not click in.

Why are you using a usb ethernet adaptor? Just plug the modem into the usb port.

I have a WRT54G Wireless modem with firmware version 1.02...

I have a WRT54G Wireless modem with firmware version 1.02.1 Mar 4 2003. i down loaded the latest firmware for the modem but i can't install it. I get the erroe message"incorrect image file".
What is wrong?

Which version of the WRT54G do you have? If it is not clearly stated on the router, go to Wikipedia.org and search for WRT54G, then you can use your router's serial number to determine which version of the router you own.
The version of the router is important. Each version has a different set of hardware in it, so each version takes a different firmware.
You can only load the firmware that corresponds to your model and version.

Replace g60 modem with voice fax data mpdem

I have a HP G60-23US lap top.
For a special application I need to replace the basic "data/fax" modem with a "voice/data" modem. Where can I find detailed specifications for size of the basic CX 11256 modem so I can look for a replacement.

Hello gerhard38. I understand you are looking for specifications on your modem. These are the best results I could locate on the Internet: http://www.conexant.com/Product/modems/legacy/soft/CX11256/Pages/default.aspx
If these specifications are lacking for you, I would contact the manufacturer and inquire about the exact specifications.
Let me know if you have any other questions or concerns.
Mario
I worked on behalf of HP.

Modem with mac & PC

I am trying to share a cable modem with someone who has a PC. My sister doesn't have wireless internet, she uses a cable modem and a CAT5 cable. When I separate the CAT5 from her computer and try to plug in mine, I am unable to connect to the internet.
I'm able to plug her computer back in and get right on the internet, so I know it is not a 'power cycling' issue with the modem itself. And we've tried plugging in a friend's macbook and had the same results.
Is there any way around this problem? Of course I can just get online using my sister's computer, but there are times when it would just be faster to use my own.
TIA.

HI, Chaplin
this can have different reasons. The most likely is the following:
when connecting, the provider hands out an ip address through the modem to the computer. This address usually stays valid during connection time, and for a given time after disconnection (typically orders of a few hours). Thus, when disconnecting the pc, one cannot immediately connect any other computer for this amount of time. Only after the time-out period it should be possible.
using an airport express or similar thing allows you to connect more than one computer simultaneously. i think this might also be possible with other (non-wireless) devices, but i have no experience with this.
Hope this helps
Thomas

Is it reasonable to replace Qwest Pk5000 modem with "Time Capsule" to serve as my modem/local Wifi/backup device?

I am both new and old. That is, I am an old guy who is relatively new to Mac and to forums. I could use some advice, please. I believe I want to buy Apple's "Time Capsule" (TC) to back up my 1 week old MacBook Pro and my old Win 7 Laptop. Currently I have Qwest as my provider. They have installed their ActionTek PK5000 modem.
Question, can I, or better yet, should I replace their modem with TC? I plan to use a wireless network for my home (iPad, wireless printer) and my kids when they come to visit. I believe Qwest won't support TC ... understood, but would it work? and would it be the smart thing to do? If so, would TC need to configured manually or would air port utitlity handle the details? Thanks for any advice. -- tom

tomfromprescott valley wrote:
I believe I want to buy Apple's "Time Capsule" (TC) to back up my 1 week old MacBook Pro and my old Win 7 Laptop.
That's possible, but a bit tricky. Apple's Time Machine software will back up your Mac to the TC, but you'll have to find a Windows app to back up the laptop. I don't do Windoze, but understand the WinClone app may work for that.
Further, mixing Time Machine backups on a TC's internal HD causes some conflicts. See #Q3 in Using Time Machine with a Time Capsule for an explanation and some possible workarounds.
Question, can I, or better yet, should I replace their modem with TC?
No. The Time Capsule is a wireless router with a hard drive. It does not contain a modem.
Usually, you plug the TC into the modem. The TC then provides the network.
But that modem is also a router (ie, provides a network), so you'll need to either turn its router function off, or configure the TC to join the existing network.
If so, would TC need to configured manually or would air port utitlity handle the details?
Either way, you use Airport Utility to configure the TC.

Apple modem with Lion

In Lion, if I attempt to connect the Apple modem I bought with this computer (an iMac purchased in 2007, though About This Mac suggests the general style is "5.1 late 2006") I am faced with the message "Unsupported: You cannot use an Apple USB modem with this computer". For the present, as I still have a Snow Leopard disk and I rarely use the modem apart from sending the very occasional fax, there is no problem. Even so, my next house move will be in a few months, and I know that one tends to spend about a month on dial-up until broadband is released and assigned.
My questions are: (1) Do I need to buy a third-party modem? (2) Is it likely to work?
Many thanks in advance for any suggestions.

John Whittaker wrote:
(1) Do I need to buy a third-party modem?
Yes.
(2) Is it likely to work?
If the maker says it's compatible with Lion, probably.

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can I use apple modem with ge keyboard and mouse?

Which Apple Modem is it exactly?
And why would/how could the Modem affect the Mouse or KB as you see it?

TC behind modem with DMZ

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