Routers chained E900 - double NAT

I understand double and triple NAT is unstable.

How to configure routers to solve this problem?  DMZ?  port forwarding?

Here is my configuration:

comcast modem--->---> router Netgear router E900

I want to divide the internet access from a single IP DHCP of Comcast to two separate networks; business network the router E900 and comments for Netgear router network.

Please keep in mind:

-I want the E900 and Netgear network is completely separate and invisble to the other for security issues.

-i want hosts to connect to networks with no special configuration required then I would like if possible that DHCP on both routers,

thx for any help

You certainly don't want to put the E900 in bridged mode. Put the E900 in to fill the mode would not meet your security requirements.

Your first statement in your first post "I understand the double and triple NAT is unstable" is an incorrect statement. I have currently triple a NAT configuration and there is nothing unstable at all. The only time where people suffer from instability and problems is when they don't cascade NAT routers correctly. In other words, if you try to cascade NAT routers and put them both on the same local network segment... you will most likely problems.

Why you want to work around NAT?

It seems you have the routers cascade properly, so there is no need to bypass the NAT.

If you post the brand and model of your modem, someone here on the forum can tell you if it's a NAT router or a simple dumb modem.

Tags: Linksys Routers

Similar Questions

  • Strange double NAT, although there is only a single router

    My ISP (RCN) changed my modem at a speed greater than one.  Although a router built-in, I told them that I didn't use their router, only my Time Capsule, so they disabled.  However, my Time Capsule kept gives me an error message Double NAT and amber flashing against Green, even though everything seemed to work (wireless and wired) and said that I should switch DHCP and NAT to bridge mode.  Correction of the error, but I do not understand what caused the Double NAT if there is only a single router.  The ISP Technical Support people confirmed their control center is not the router feature on in the new modem, I ask.  They also said that their network supports DHCP, although they have other who use the Bridge Mode, although they do not support.   And they knew nothing about it, he said to ask Apple.  They also offered to switch back, but because this modem is faster at the same price.  (He called a bypass gateway 3-in-1).  Many people online told not to use his router, it's why I unplug it and only use the time Capsule.

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    3 swap back to the previous modem, which was 50 Mbps against it with (theoretically) 155 Mbit/s (it's only works in 50-70).

    I'm not really all that, but I hope that one of you maybe.  Thank you!!!

    Although a router built-in, I told them that I didn't use their router, only my Time Capsule, so they disabled.

    ISPS often make the mistake of simply turn off the radio on a modem/router...which service does not disable the router function of the device. You still have a wired router when ISPS are making this mistake.

    However, my Time Capsule kept giving me an error message Double NAT

    This confirms again that the ISP has not disabled the function of the router to your modem/router.  On some modems/routers or gateways, it is not possible to get the device to act as a simple modem.

    The ISP Technical Support people confirmed their control center is not the router feature on in the new modem, I ask.

    The fact remains that you wouldn't see a Double NAT error unless the ISP system acted as a router... Despite what people of PSI say. You may need to get a 2nd or 3rd person-level support, who knows what they are doing.

    1. keep running the new modem and my Time Capsule in Bridge Mode.

    Yes, if you want to avoid the mistake of NAT Double... what you are doing. But, the time Capsule will not be your router.  The device of the ISP will be.

    2. run the new modem in DHCP mode, as they put in place and do not worry Time Capsule seeing amber / flashing Double NAT error.

    This only if you willing to accept the fact that the ISP did not correctly change your gateway to make it work as a simple modem only.  You might be able to get away with a Double NAT error on a simple network, but there is no reason more complicate things with a misconfiguration in unless whether there are a few reasons to do it and it can't be avoided.

    3 swap back to the previous modem, which was 50 Mbps against it with (theoretically) 155 Mbit/s (it's only works in 50-70).

    Your decision if you want to run a simple modem with time Capsule, or accept the fact that the time Capsule won't have your router when it is configured in Bridge Mode, or you see a Double NAT error on the network.

    If it were me, I would go back to what I know will work properly... the simple modem and time Capsule as the router.

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    You will have to live with the Double NAT if you want AirPort Extreme to act as a remote router that provides a private network.

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    My Internet connection has worked very well for several years, until recently, when the simple DSL modem (a Motorola 2210-02 - 1ATT) provided by AT & T began to experience intermittent outages. Initially, the DSL modem would lose the line for a minute or two at a time. But within 48 hours, the line started to drop during the hours in a row (synchronization failed line DSL). Whenever the modem has lost the line, my Airport Extreme (the router on my home network), shows a "Double NAT" alert. But whenever the modem 2210-02 DSL connection has been restored, alert the Airport Extreme's "Double NAT" disappeared.

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    access-list 102 deny ip 192.168.179.0 0.0.0.255 host 192.168.1.249
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    213.144.228.0/32 is divided into subnets, subnets 1
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    http://docwiki.Cisco.com/wiki/category:NAT

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    !
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    Since you seem to need the step by step instructions or need help to understand the different terms networking, I highly recommend that you help you to become familiar with networking, specifically on Apple systems. I suggest you consider taking the e-Book to the next control: take control of your Wi - Fi Applehttps://www.takecontrolbooks.com/apple-wifi network

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