public network traffic to my ip address port 53

[Matthew Seaman]

On 03/19/15 15:26, Ernie Luzar wrote:
> I have been running this home server for 15 years and have never had a
> dsn server.
> Last time I scrutinized  my firewall log was 2 plus years ago and I did
> not have all this unsolicited inbound dns traffic.
> To me it looks like a search for dos targets. To my knowledge dsn
> servers DON'T  roll through pubic IP address  ranges looking for other
> dsn servers.

This is indeed the result of people, or rather, bots, trying to exploit
poorly configured recursive DNSes.  If they can find a server that
responds, they will use it as a traffic amplifier for DoS attacks.
Consequently there are a lot of DNS queries hitting random addresses
trying to find those poorly configured DNS servers.


> So I ask the question again "Is there any valid reason to allow these
> unsolicited inbound packets access to my system on port 53?".

No.  They are bogus.  Block them at your firewall.

	Cheers,

	Matthew


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