I am having issues with external hackers trying to access my external 2012 R2 server, I have it open for RDP only and just recently keep seeing failed logon attempts with random usernames and passwords.
I am looking for a way of blocking all external IP's for accessing RDP apart from my own IP, I have tried with the Windows firewall but for some reason this is not working very well so was thinking of a hardware firewall?
I use SonicWall's for work and this may also be good to secure other devices on the network as well as I can force all traffic though it but this is not the main objective.
I looked at SonicWall TZ-210 devices and you can pick one up for £40 but I think I will have to buy a license which is expensive and I dont want to spend out too much.
Does anyone have any suggestions?