So if your internal network is not using the 10.x.x.x range, and those 10.83.x.x IP addresses are registering
as coming from the belkin's WAN interface, the spoof message makes perfect sense -- see Wiki here
If 10.83.x.x is coming from the LAN interface, I'd say someone's on your internal network and messing around
As for multicast, look here
for a definition. Basically,
a host on your network is looking to "join a group" for a shared stream of data. Whether it's legit or not
basically needs someone versed in network operation and figuring out who joined and what they are doing.
said by passedout:
Are there other precautions I can take to prevent future attacks to this newly fitted router?
- strong passwords
- do not use the default passwords
- disable unneeded services
- disable remote access if not needed
- enable logging
- if there's wireless, ensure it is using the strongest possible encryption and a strong password
- change passwords on a regular basis
- know what is plugged into your router -- it really sucks to trace out a cable and find out some jack-twat
ran their own line to another unauthorized device(s) without your knowledge and borked the whole thing.
- PHYSICAL SECURITY -- if no one else is supposed to access / manage this device, lock it in a room!