Hi there, I'm posting about some suspicious network traffic that I believe may be causing regular disconnections for us. The system log regularly reports a barrage of the following:

2025-02-25 04:10:37 [6] VoIP: can not find any account forthe incoming call

We will then see an error suggesting that we've had our connection terminated by the network. I've restarted the router since, so I don't have an exact log. The DSL light will go orange, and then eventually reconnect.
 

We don't use the VoIP service that our ISP (iiNET) provides, there's nothing configured in our router to allow incoming or outgoing calls, plus I've set a 24/7 DnD, even though it's unlikely to do anything in this instance.

I want to try and blog ports 5060 and 5061 since they are the ports used for VoIP, but I can't find a way to do that for incoming, only outgoing in the Service Filtering page. I'm using the Access Control page to set a whitelist the router, our Deco Mesh base device, and a couple of our PCs, so we can maintain and check the router status, etc.

Is there a way to block ports for incoming data with the VX1800v, and how so? I'd like to try and get this sorted to ensure that it's not these attempts at incoming connections that's causing us disconnections, and I can then push on iiNET/NBN to do more about the issue. And if it is these attacks I can at least stop the issue in it's tracks.

Thanks in advance for any and all help provided. ;)