Can't access 192.168.100.1 when connected through my ASUS AX Router

[csm10495]

I think its just a modem.. It's an a Motorola MB8611

 

[ColinTaylor]

I think its just a modem.. It's an a Motorola MB8611

Looks like it.

What is your router's "WAN Connection Type" set to? Automatic IP? If so then presumably your router should also be getting a 192.168.100.x address (Network Map > WAN IP) just like the PC did.

 

[csm10495]

Set to Automatic IP... but the WAN IP in Network Map -> WAN IP is my public IP address

 

[ColinTaylor]

Set to Automatic IP... but the WAN IP in Network Map -> WAN IP is my public IP address

I'm out of ideas. Hopefully some other MB8611 owners can chime in.

 

[Tech Junky]

I was using a mb8600 and it would work intermittently for the management IP. Mostly when rebooting before it synced up and got online. Put a route to the subnet in the router with the wan interface to bypass routing rules and allow the modem to be reachable. I did this for things like Amazon prime that bitches about VPNs and no longer have the issue with Amazon and a couple of bank sites.

VPN + Amazon Prime - add some routes

So, I finally got the urge to dig into how to setup my DIY router / VPN to split tunnel off crap like Prime to make it work through the streamer box and all devices to avoid the infamous.... Anyway... I got it working on the streamer by adding some routes after messing around with trying to...

www.snbforums.com

 

[csm10495]

Do you have an example for the parameters for the route? I've tried: https://www.snbforums.com/threads/c...d-through-my-asus-ax-router.79150/post-790070

already.

When rebooting, i never seem to find a window where it works.

 

[tonymet]

Same issue with RT-AC5300 . It's not accepting the route configuration from the cable modem

SOLUTION: Add a static route​

• Network / Host IP = 192.168.100.1
• Netmask = 255.255.255.255
• Gateway = 0.0.0.0 (shows as * in system routing table once saved)
• Metric = 1 (default)
• Interface = WAN
• Add delete = click (+) to add before saving

Testing​

1. 1. : Ping from router
   1. target host = 192.168.100.1
2. Test from browser

 

[tonymet]

@csm10495 see comment above that should work for you.

 

[netmik3]

Same issue with RT-AC5300 . It's not accepting the route configuration from the cable modem

SOLUTION: Add a static route​

• Network / Host IP = 192.168.100.1
• Netmask = 255.255.255.255
• Gateway = 0.0.0.0 (shows as * in system routing table once saved)
• Metric = 1 (default)
• Interface = WAN
• Add delete = click (+) to add before saving

Testing​

1. 1. : Ping from router
   1. target host = 192.168.100.1
2. Test from browser

View attachment 45521

I tried this. It didn't work and didn't show up in my routing table. I did turn it on. I would prefer this so it doesn't stop working like the previous one that used the wan ip. I didn't try that one.

 

[tonymet]

I tried this. It didn't work and didn't show up in my routing table. I did turn it on. I would prefer this so it doesn't stop working like the previous one that used the wan ip. I didn't try that one.

Can you check the console-based routing table there? it should show up

 

[netmik3]

View attachment 45530


Can you check the console-based routing table there? it should show up

That's the screenshot I had right?

 

[tonymet]

That's the screenshot I had right?

Yours looks different than mine

 

[netmik3]

Yours looks different than mine

View attachment 45534

How weird I guess Merlin dresses it up but should be the same table. Thanks I'll try again later.

 

[netmik3]

I finally got it to show but with metric 2? I did enter 1. Anyway I still can't access my modem. I can access it fine with the computer directly plugged in.

 

[csm10495]

Yeah i made this route and it seems to work (for pings only... http doesn't work)... but next time i rebooted the router it stopped working again.

SOLUTION: Add a static route​

• Network / Host IP = 192.168.100.1
• Netmask = 255.255.255.255
• Gateway = 0.0.0.0 (shows as * in system routing table once saved)
• Metric = 1 (default)
• Interface = WAN
• Add delete = click (+) to add before saving

Testing​

1. 1. : Ping from router
   1. target host = 192.168.100.1
2. Test from browser

View attachment 45521

 

[Howard_inGA]

Try setting a static route to the external IP of the modem.

I've had the same problem accessing my CM1100's interface at 192.168.100.1 except that in my case, it started after I activated Ethernet Port Aggregation (LACP 802.3ad) in Feb 2022. After reading two dozen threads at least with regard to Port Aggregation on the CM1100, it seemed like that was a sacrifice to be made for using it. It made no sense, but no one seemed to have an answer.

Now months later, I see similar things happening across the board after a firmware update to the modem? I have an Asus AX88U, I added the static route using the router interface, saved the changes, powered the router off/on (this is a REQUIRED step since the reset always hangs the Asus web interface), and voila! I now have access to the CM1100's management interface again at 192.168.100.1

For everyone else who has a similar Asus router, here is a screenshot for reference!

This worked to regain access to the CM 1100 Modem!!
Find your IP at https://whatismyipaddress.com/
Go to the router LAN - Route page and enable static routes, then add this route info:

​

192.168.100.1

255.255.255.255

Your IP Address

1

WAN

Hit Apply button and access your modem as before!!!!!
THANKS!

 

[Howard_inGA]

Same issue with RT-AC5300 . It's not accepting the route configuration from the cable modem

SOLUTION: Add a static route​

• Network / Host IP = 192.168.100.1
• Netmask = 255.255.255.255
• Gateway = 0.0.0.0 (shows as * in system routing table once saved)
• Metric = 1 (default)
• Interface = WAN
• Add delete = click (+) to add before saving

Testing​

1. 1. : Ping from router
   1. target host = 192.168.100.1
2. Test from browser

View attachment 45521

So, the solution I'd proposed and used successfully got dropped doing modem attempted upgrades. I went back to this one, and service to modem restored, then added my solution above again. It worked like a charm as well. I prefer it, since it uses my unique IP address rather than 0.0.0.0
It is a bit of a pain, and I am clueless as to what is causing the loss of service...

 

[netmik3]

I know it's been a while but I still can't get this to work. Anyone have a solution?

 

[Crimliar]

To a point it depends on how you have your modem connected, and even brand/model! Mostly setting:
WAN>
Get The Wan IP address Automatically = No
IP Address = 192.168.100.10
Subnet = 255.255.255.0
Gateway = 192.168.100.1

That will create an additional connection on the WAN port connecting to a modem that is at 192.168.100.1 with the router identifying itself on the WAN port to that device as 192.168.100.10. This does absolutely work in many cases (if your modem has a different address then the IP and Gateway need to be changed). Doing this should add a second gateway, not just replace the address issued to the router from the WAN DHCP.

*Historically this has worked for me with Draytek Modems and Huawei modems but not with Xzyel modems or the Netgear DM100!

 

[coxhaus]

Pfsense now blocks all private IP addresses from the firewall to the WAN side so maybe ASUS does also. I guess they only use the WAN IP. You can turn this off if you want. But it is on by default now. So, 192.168.100.1 will not pass the firewall by default.