External access issue after switching to optimum fiber modem

[Bigmack3000 107]

Has anyone else gone through this?  I switched to fiber yesterday.  Unfortunately, they did not inform me that the new modems do not offer a public id address to wifi routers.  It only gives my router a private ip. This to me sounds insane, but they refuse to budge on it. Any ideas how to gain external access still?  

[Happy2Play 9780]

Odds are up are now on a cgnat.

Different fiber network but will require the same tracert test to confirm.

Or need to contact them and possibly pay more money for static ip.

Edited February 23, 2025 by Happy2Play

[Q-Droid 989]

17 minutes ago, Bigmack3000 said:

Has anyone else gone through this?  I switched to fiber yesterday.  Unfortunately, they did not inform me that the new modems do not offer a public id address to wifi routers.  It only gives my router a private ip. This to me sounds insane, but they refuse to budge on it. Any ideas how to gain external access still?  

Are you sure about this and have you contacted their support to ask? Their gateway/modem could also be a router which by default would be in NAT mode and giving private IP's on the LAN side. Many have a bridge or passthrough mode that is not the default. Some providers have a separate ONT with an RJ-45 port and it might be possible to plug your router directly. 

 

 

[Bigmack3000 107]

yes Im pretty sure the new modem is cgnat.  

this is from canyouseeme:

this is from optimum:

this is from my router:

Edited February 23, 2025 by seanbuff
removed public IP

[Bigmack3000 107]

3 minutes ago, Q-Droid said:

Are you sure about this and have you contacted their support to ask? Their gateway/modem could also be a router which by default would be in NAT mode and giving private IP's on the LAN side. Many have a bridge or passthrough mode that is not the default. Some providers have a separate ONT with an RJ-45 port and it might be possible to plug your router directly. 

 

 

I've been on the phone with them all day. they absolutely refuse to do it.  I do not understand why.  They claim it is already in bridge mode.

[Q-Droid 989]

10 minutes ago, Bigmack3000 said:

I've been on the phone with them all day. they absolutely refuse to do it.  I do not understand why.  They claim it is already in bridge mode.

Is their gear a router? I don't know how much access you have to their device. But if it's in bridge mode then it's possible it restricts that to a specific port on the gateway, so make sure to  use that port.

If they are using CGNAT then their gateway, if it's a router, would not be getting a public IP. This is another thing to check.

 

[Bigmack3000 107]

i believe it is a gateway modem

[Bigmack3000 107]

I cannot access much about the modem. I only know it's in bridge mode because they told me it was.  They can't show me anything to prove that. 

[Q-Droid 989]

Do you have a make and model of the device?

 

[Bigmack3000 107]

altice AUSA Model: GR240JH

[Q-Droid 989]

It appears that LAN port 4 is the one to use when in bridge mode. Did you try that? And did you try rebooting the gateway after they changed it?

 

[Bigmack3000 107]

ha, lan 4?? optimum had me try 1 2 And 3, and mentioned nothing of 4. I'll try it. fingers crossed.

[Luke 42078]

Let us know how this goes. Thanks.

[Bigmack3000 107]

ok i think I'm a lot closer now.  this is the router ip after choosing lan 4:

 

but this is what automatically emby lists:

 

Edited February 24, 2025 by seanbuff
removed public IPs

[Bigmack3000 107]

Also the LAN on my router is 192.168.0.1,  as shown. but in optimum it lists the LAN of my modem as 192.168.1.1.  is that fine? or a problem

[Bigmack3000 107]

Ok i restarted emby.  now the correct wan ip shows up:

 

and if i click that link on my computer it opens fine.  but if i try to connect remotely on my phone, the server cannot be found

Edited February 24, 2025 by seanbuff
removed public IP

[Bigmack3000 107]

ok, probably too many updates from me, but i removed the server from my phone app, then reconnected on wifi, and it brought over the new correct wan access as well. I think I'm all good for now. Thanks everyone!