Lost access to frontend after ISP switched from DSL to WAN (optic fiber)

eingespielt · July 1, 2023, 5:44pm

Hello Guys,
I’m lossing my mind here abit. After our ISP switched our connection form DSL to optic fiber yesterday we got a new IP Range and all Local IPs changed and thats when Home Assitant stopped working (can not access it inside nor outside of the network). Today I tried everything that came to my mind.

I restarted my Virtual Box (it now has a new IP)
I changed the port forwarding on my FritzBox
I checked DuckDNS
The new local IP is not responding
I changed the local adress in the config to the new one (from the Windows Explorer)

And now I’m running out of ideas. I have to add that I don’t know everything about IPs and Networking (Didnt pay that much attation in Networking Class)

More Information:
My Home Assistent runs on an old Ubunu Laptop inside of a VitualBox.
Connected with Ethernet.
I have a Frizbox 7590 router.
The hole System was running fine for the last 2.5 years.

I hope someone smarter than me has an idea on how to fix this…

afxefx · July 1, 2023, 7:04pm

What provider did you switch too? I just switched to Metronet and had to get a static IP because they use CGNAT on their default IP addresses given to new customers which breaks port forwarding. Got it set up yesterday and all is back working but all my issues were from external.

EDIT: I didn’t read concisely enough the first time and realize what I said would only be part of your problem since you are having issues with local access also.

woempiej · July 1, 2023, 7:09pm

Wire a laptop to your new router.
Setup the network settings off the laptop to static and use the old local range.
Can you reache HA then on it’s old IP adress?

woempiej · July 1, 2023, 7:11pm

Or change the fritzbox dhcp to the old IP range

aceindy · July 1, 2023, 7:30pm

what do you mean with ‘new ip range’ and ‘local ip’s changed’ and fritzbox??
Is the fritzbox yours or ISP??

tom_l · July 1, 2023, 7:35pm

Yeah, you need to set your router up to use the previous internal ip range or you will not be able to access anything that was given a static ip address in that old range.

eingespielt · July 2, 2023, 9:07am

Well… I don’t know the old IP (or the IP Range for that matter) because I already changed the IP everywhere (Port Forwarding and the local address in the config). Is there a way to see the old IPs in the cli console? Or a other smart way that I’m not thinking off?

woempiej · July 2, 2023, 9:27am

You don’t know the old local IP?

Fritzbox is using 192.168.178.1 right?
What was the IP adress of the old router? What brand was the old router?

eingespielt · July 2, 2023, 10:02am

Yes I just found my old local address of my main computer. It was 192.168.172.xx.
And I had an Fritzbox the hole time it was just the switch from DSL to WAN that caused the router to give out new IPs. Now it’s 192.168.188.xx
But I really don’t feel like testing all 253 possibility

woempiej · July 2, 2023, 10:15am

Configure your PC to 192.168.172.5 and go into windows command line and search with arp-a
Or use a free program like advanced IP scanner to scan the network in a given range.

eingespielt · July 2, 2023, 10:55am

arp -a only shows me new addresses (192.168.188.xx) and scanning the old range wouldn’t do anything right because there are no longer any devices in 192.168.178.xx or am I wrong?

woempiej · July 2, 2023, 11:00am

Maybe there is Julius. If you are scanning the network with a device in the 192.168.188.XX range then it can not find a device with a 192.168.172.XX IP adress.

Thats why I told you to set your main computer to 192.168.172.5 and search then

eingespielt · July 2, 2023, 11:16am

Okay but when I changed my Computers IP to 192.168.172.5 I lost connection to the router and changing the Computers IP in the router doesn’t work because it’s out of range of the router. Should I change the router’s IP back to the old range or am I locking myself out of my network with that?

aceindy · July 2, 2023, 11:17am

without you re-configuring it…not possible

woempiej · July 2, 2023, 11:25am

Yes like I sayed before man.
Forget the PC settings then! You don’t lock yourself out of your network if you PC is on DHCP.

Change Heimnetz to 192.168.172.1

and below the DHCP settings to 192.168.172.20 - 192.168.172.200

Ohhh and below that I see DNS.
Change that to 192.168.172.1

eingespielt · July 2, 2023, 12:16pm

Okay I changed the settings to 192.168.178.xx (178 not 172 I looked up old chat where I shared my PCs IP) now. The Home Assistant’s address is 192.168.172.31 now. The Main PC has a new address and when I do arp -a is just shows the IPs I know already form the routers site. So I still dont know the old Home Assistant IP

tom_l · July 2, 2023, 2:01pm

Connect a monitor and keyboard to your home assistant server.

At the command prompt press enter, login as root no password. Then type:

login Enter

then

nmcli connection show Enter to list your connections

nmcli con show "Your Connection Name" Enter to list the current properties of that connection

nmcli con edit "Your Connection Name" Enter to enter edit mode for that connection

nmcli> print ipv4 Enter will show you the ipv4 properties of that connection

eingespielt · July 2, 2023, 3:45pm

Okay did that. Do I understand the console output right that the IP has been changed automatically?

Because the mode is automatic

(sorry for pictures and not text)

eingespielt · July 3, 2023, 9:57am

Okay I just looked over my config and I don’t know if it’s still the way to setup the internal and external URL

default_config:
  external_url: https://home-assistant-xx.duckdns.org:8123
  internal_url: http://192.168.188.31:8123

Is this still correct?

tom_l · July 3, 2023, 10:03am

Yes. That is still the correct method. Your IP address is incorrect though.