I dont have logs enabled, will try and start them going now.
Found a couple of other bits relating to this, seems im not the only person for which this is now happening.
Just been reading this...
Yep, one of the IPs (the source IP) in the log is an internal nonroutable IP address. BTs SNMP querying servers are in this range.
The IP address that the VDSL modem has assigned by DHCP on its “BT management interface” is a “routable” 30.X IP address!
Connection Name IP Address Subnet Mask Default Gateway
ptm1.301 30.119.X.X 255.255.248.0 30.119.X.X
Why would BT be assigning a routable (and not even owned by them!) address to VDSL modems? Seems more sensible to be using (as you note) the local private IP addresses for their CPE management network IPs.
I realise that it’s unlikely to cause problems to the end user as the modem is just bridged and can’t “usurp” traffic to that subnet.. but from a technical point of view it seems a bit weird.
Freeserve Dial-Up --> BTopenworld
-->Talk Talk LLU --> ZeN
DrayTek 2850 VN