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Date:      Thu, 19 Mar 2015 21:55:36 +0700
From:      Olivier Nicole <Olivier.Nicole@cs.ait.ac.th>
To:        Ernie Luzar <luzar722@gmail.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: public network traffic to my ip address port 53
Message-ID:  <wu7mw39dok7.fsf@banyan.cs.ait.ac.th>
In-Reply-To: <550AE2A7.3010903@gmail.com> (message from Ernie Luzar on Thu, 19 Mar 2015 10:52:23 -0400)

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Ernie,

> In my firewall log I see thousands of udp packets from ip addresses all 
> over the word trying to access my freebsd gateway server on port 53.
> Right now I am blocking them and see no negative effects.
> Is there any valid reason to allow these unsolicited inbound packets 
> access to my system on port 53?

You know port 53 is DNS?

Maybe your IP was previously used by a DNS server.

If you bloc port 53, you may consider leaving it open enough to be able
to solve your own DNS requests.

Olivier

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