I'm setting up a public web server: Windows Server 2008 R2, IIS7.5. Does anyone have a tutorial / walkthrough / tips on properly securing a public web server? I've seen a few tutorials but mostly focused on Windows Server 2003.

What I've done so far:

  • Created a specific user account for the website / app pool,
  • Renamed Admin account,
  • Installed FTPS,
  • Configured firewall to block any non-public service (web / https),
  • Configured firewall to allow access to management interfaces only from specific IP addresses (rdp, IIS management, ftp)

Maybe a few other things but can't remember at the moment...

ICMP is allowed... Should I disable all except ping?

Port scan reveals only web and https ports.

Any other suggestions?



As far as ICMP, I don't disable it. Certain ICMP messages control TCP window scaling and path MTU discovery. Disabling ICMP can lead to connection problems.


http://www.znep.com/~marcs/mtu/ <- Path MTU issue

http://www.daemon.be/maarten/icmpfilter.html <- ICMP filtering policy

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Looks good. Do you have anything in front of the web server?

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Check this question (though much only applies to IIS6) and have a look at Server 2008 Security Compliance Manager to create and apply a local security policy.

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