Our dedicated server located at a hosting company in the UK is being probed regularly (automated?) by a few machines located in China. I would like to know how to block them.
The server hosts a https website and MS Sql database.
I have the attackers IP addresses and the computer names they are using.
I have access to the Cisco 506E using PIX.
Can I add a filter to block all their IP addresses? The majority come from 219.153.*.* and 222.73.*.*
Much appreciate any help you can provide.