It is definitely possible to enforce signature-based blocking or inline patching farther upstream from the server....
Using layer-7 protection technologies like Web application firewalls or in-line intrusion prevention systems (IPS) will help mitigate or resolve virus or other malware threats before they reach the server.
However, I would not place such a product in front of the firewall connection, given the amount of noise generated by unfiltered Internet traffic. Ideally, these products would be placed as a layer-2 bridge on the link between the firewall and the switch infrastructure hosting the servers.
As this blocking is being handled further upstream -- outside of the virtual environment -- it is effective at protecting multiple virtual servers hosted on the same physical hardware.
Dig Deeper on Network Firewalls, Routers and Switches
Related Q&A from Anand Sastry, featured expert
While encrypting production servers may seem like a good security move, according to Anand Sastry, doing so may not be worth the resources it uses.continue reading
Transferring files from a DMZ to an internal FTP server can be risky. In this expert response, Anand Sastry explains how to use SFTP automation to ...continue reading
When setting up a site-to-site VPN, where should the VPN endpoint be in the DMZ? Learn more in this expert response.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.