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PatG
New Contributor

Created on ‎03-05-2017 01:52 PM

DNS Filter hosted DNS server

I have a split DNS system installed in my network.

 

My external DNS only serves DNS records for my 3 domains.

 

I have been receiving a lot of spurious DNS queries associated with DNS amplification attacks, which all get rejected by bind. However I would like to block these requests at the firewall rather than passing them to my externally facing DNS.

 

So what what I would like to do is:

[ul]
  • Allow queries to:[ul]
  • example1.com
  • example2.com
  • example3.com[/ul]
  • But block queries to any other domain.[/ul]

    Any ideas?

     

    Thanks,

    Pat

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    ede_pfau
    SuperUser
    SuperUser

    Created on ‎03-06-2017 02:45 AM

    A custom IPS signature would be an option. No fancy stuff inside, just matching '^(dom1.com|dom2.com|dom3.com)'.

    Actually, you could open a ticket an ask FTNT if they would help out with this.

    Ede Kernel panic: Aiee, killing interrupt handler!
    Ede Kernel panic: Aiee, killing interrupt handler!
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