[SOLVED] I cannot access my modem's UI after purchasing a new router

[lordpuffer]

I currently have the Linksys MR8300 Mesh router. I also have the Arris Touchstone CM8200 modem (a DOCSIS 3.1 modem, and I have a Gig down). I live in the US and Cox is my ISP. My modem is wired to the router and then to my iMac.

My previous router was the Linksys WRT1900AC V1. I had it wired the same way. With my previous router, if I entered 192.168.100.1 I would pull up my modem's UI. I could do this wired or wireless.

However, this does not work with the MR8300. When I enter 192.168.100.1 it just finally times out. At least on Safari and Chrome.

If I connect the modem directly to my iMac, 192.168.100.1 will pull up my modem's UI.

The strange thing is that after speaking to Linksys about this issue for a couple of weeks now, they had me try doing a hard factory reset on the MR8300. After I did the reset, I was able to access my modem with the router connected using 192.168.100.1. But that was short lived.

I decided to reboot my network (modem, router and switch) and after I did so I could no longer access my modem.

I would return this router, but it's rock solid otherwise. It hasn't skipped a beat in the weeks that I've owned it. Plus, I think that it is a firmware, not a hardware issue. What are your thoughts or suggestions?

 

[Barty1884]

Is ....100.1 the default IP address for the new modem? There should be a sticker on it confirming.

 

[lordpuffer]

.....100.1 is the default IP address for the modem. I've had the modem about 16 months. It's the router that is new

 

[jsmithepa]

What is the LAN IP of the MR8300?

WAN IP of the MR8300 (first 2 octets sufficient for your privacy).

iMAC IP, Mask, DNS, Gateway IP?

 

[lordpuffer]

Thanks so much for your response.......There are so many different IP type addresses I hope that I'm giving you the correct ones:

LAN IP of the MR8300 - 192.168.1.1

WAN IP of the MR8300 - Can you please direct me how to find this? If it's the same as the IPv4 Internet address then it starts with 68.

iMac IP - 192.168.......
Mask - 255.255.255.0
DNS - 1.1.1.1 and 1.0.0.1
Gateway IP - 68.........

 

[failboat]

many routers block private ip addresses outbound destination. you can search your features to see if you can modify it or add a pass rule for that specific ip on WAN.

Also don't post your WAN IP.