can someone please elaborate on what this actually is?
Is this actually someone attempting something nefarious?
Is this a permanent ban for this peer?
Is there a ban list I can manually edit?
Cheers.
EDIT:
I do have firewalls enabled for each device and at each level of the network.
Looking at the code, I believe the list of bad peers is generated in memory so there is no file store of the bad peers. A peer is added to the list when they submit invalid shares to your node. Looking at my logs I get a few of these and since they are not from the same IP I do not see them as "nefarious". Perhaps they could be due to intent or by mistake but since that IP is banned immediately I don't see it as pertinent.
It's painful, but i'm sitting watching the terminal window non-stop, any address which is flagged as bad peer banned then I add to my list and block the address and address block in my modem, ufw and router.
I also see other errors crop up and a peer drop and i copy the address into a text file, if i get the same peer more than once then I block that IP as well.
Overkill? perhaps. But I'd rather be safe than sorry.