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Mark_Oliver's avatar
Mark_Oliver
Guide
Sep 24, 2016
Solved

Cannot access cable modem’s Configuration Manager via R7000

My router is a Nighthawk R7000 with 1.0.7.2_1.1.93 firmware.

 

I am attempting to replace a DSL gateway with a Zoom 5370 cable modem [just plain vanilla: no router included]. When the 5370 is directly connected to my Windows 7 desktop computer, I can use a browser to access Zoom's "Configuration Manager" administration area by going to IP 192.168.100.1. But when the cable modem is connected to the R7000 router's "Internet Port" [in place of the DSL gateway], I cannot browse to 192.168.100.1: the page times out / never comes up. (Tried in both Firefox and Opera browsers.)

 

I looked carefully through the router's settings and found nothing that might conflict with the cable modem's IP address.

 

I don't know how to begin to troubleshoot this (and am profoundly anxious to get off of DSL).

 

UPDATE

Apparently another user had the same issue some time back:
https://community.netgear.com/t5/R6000-Series-AC-WiFi-Routers/Accessing-cable-modem-config-page-from-clients-connected-to/td-p/1017740

 

Is there still no possibility of resolving this problem?

Troubleshooting

24 Replies

  • IrvSp's avatar
    IrvSp
    Master
    Sep 24, 2016

    I've got a Motorola SB6141 and 192.168.100.1 accesses it fine on my R7000.

     

    The modem goes into the Yellow Internet port which it appears you've done.

     

    DHCP could be the culprit here? Are you using your ISP's or another one? ISP's would know about the modem pages, another one might not?

    • Mark_Oliver's avatar
      Mark_Oliver
      Guide
      Sep 25, 2016

      Thanks for the report. That gives me some hope.

       

      I’m using the R7000 itself as the DHCP server (as configured under Advanced > Setup > LAN Setup). If I didn’t do that, I expect I’d have to manually assign IP addresses (“address reservation”) for each device’s MAC address.

       

      The address range is 192.168.1.4 thru 192.168.1.254, so there isn’t any apparent DHCP conflict with the cable modem’s IP.

       

      • IrvSp's avatar
        IrvSp
        Master
        Sep 25, 2016

        Opps, I meant DNS, not DHCP, sorry.

         

        Under BASIC => INTERNET SETUP:

         

        Domain Name Server (DNS) Address
        Get Automatically from ISP

         

        Is this selected?

         

        Can you PING it? This is what I get:

         

        C:\>ping 192.168.100.1

        Pinging 192.168.100.1 with 32 bytes of data
        Reply from 192.168.100.1: bytes=32 time=9ms TTL=63
        Reply from 192.168.100.1: bytes=32 time<1ms TTL=63
        Reply from 192.168.100.1: bytes=32 time<1ms TTL=63
        Reply from 192.168.100.1: bytes=32 time<1ms TTL=63

        Ping statistics for 192.168.100.1:
            Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
        Approximate round trip times in milli-seconds:
            Minimum = 0ms, Maximum = 9ms, Average = 2ms

         

        Cable modem is on a different sub-net, you'll never get a conflict. 192,168,1,xxx vs. 192,168.100.xxx.