Issues after replacing motherboard and using Fritzbox 7490

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ADKM

860 posts

Ultimate Geek

#311581 28-Jan-2024 14:36

My Asus Prime B250M-K motherboard died but I did buy two in anticipation of this happening.
After fitting the new board I have a couple of problems - I've connected everything back as it was and can boot to my desktop.
But I cannot use everything on the LAN or connect to the internet. On Bootup I'm told my Fritzbox router is blocking me.
This may be because the board was in use in another machine (not really used - just a standby) and intentionally blocked in Fritzbox Filters page

I find the Fritzbox 7490 a bit to understand and get around. But I think it assigns an IP4 number when a new device is connected,

The computer has retained the same Device name, but it's IP4 address now is slightly different, can I change it?

If I can revert to it's previous IP4 address, everything may kick it again. Hopes!

Many thanks any help.

Tinkerisk

4235 posts

Uber Geek

#3187786 28-Jan-2024 19:07

Check your type of Windows license (is it tightened to the old motherboard?) and allow joining of new devices to the network in the Fritzbox! 😉

- NET: FTTH, OPNsense, 10G backbone, GWN APs, ipPBX
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freitasm

BDFL - Memuneh
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Geekzone

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#3188008 29-Jan-2024 10:53

"On Bootup I'm told my Fritzbox router is blocking me. This may be because the board was in use in another machine (not really used - just a standby) and intentionally blocked in Fritzbox Filters page"

How was it intentionally blocked? Did you block it?

Blocks aren't based on IPv4 address but on MAC Address.

nztim

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TEAMnetwork

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#3188016 29-Jan-2024 11:40

My guess is the thumbprint of the machine taken by the fritz is more than just the MAC address of the NIC

I don't know much about fritz boxes but seen this on the HG659 where the MAC of the LAN has changed but the OS is the same SID

If this is the case you can another device to log i to the Fritz and remove your device from the device list

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.

ADKM

860 posts

Ultimate Geek

#3188080 29-Jan-2024 12:18

Sure wish I understood this better. Yes, I did block it and have since found a setting that might unblock it - but I'm reluctant to because I don't want to change anything that might cause further problems. There's some things that depend on the ipv4 address, incl port forwarding.

I bough two Asus B250M-K boards. When this one died the other day I replaced it with the second one. It was set up working, rather than sitting in the carton but I didn't want it on the net.

I reconnected all the exact same peripherals and it booted up OK. When the Fritz 7490 gave it an ip4 address it was different to the original one. It now shows 2 devices called Win10-pc. I need to delete this new one and revert back to using the former ip number. But I can't find how to do it. Maybe it's the mac address I have to change but this is an area I know nothing about. I was hoping someone here more knowledgeable might have the same router (Orcon distributed them when fibre started, but their help desk is no help just suggested I go to a thiird party).

freitasm

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#3188088 29-Jan-2024 13:11

Unblocking it won't cause problems with configuration.

DeepBlueSky

547 posts

Ultimate Geek

#3188148 29-Jan-2024 17:40

Download Fritzboz App on your phone and try to sort it out. If no luck to can bring up the webui on your phone’s browser just need the Ip address of the Fritzbox

ADKM

860 posts

Ultimate Geek

#3188201 29-Jan-2024 18:10

Unusual I know, but I don't have a cell phone. If I unblock it, won't I need to reenter all the port forwarding addresses as they seem to be associated with the IPv4.

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freitasm

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#3188245 29-Jan-2024 21:48

A blocked MAC Address is just that. Blocked.

Other configurations aren't affected.

Having said that, you should really not port forward anything to devices in your internal network. It's not safe.