I think i am under dns attack

I think i am under dns attack, in my /var/log/message i keep seeing these. Someone is using over 2000 ip to lookup my dns server.

Jul  8 07:14:39 petersoft named[3263]: client 65.254.249.169#31655: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 32.44.116.12#45668: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 23.247.81.239#32733: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 36.234.182.148#65128: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 32.253.30.9#24067: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 83.10.132.93#10355: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 124.12.88.39#20033: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 16.251.239.11#3843: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 15.105.18.26#12012: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 35.145.149.224#56066: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 72.250.71.141#55169: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 16.40.135.80#42400: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 108.147.217.226#45322: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 8.108.103.84#30252: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 91.206.27.44#53448: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 94.243.234.26#42498: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 120.167.243.44#57980: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 115.168.23.42#64634: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 14.85.197.38#57296: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 8.198.131.140#37656: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 1.74.160.47#41155: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 106.144.248.143#52145: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 101.189.35.99#60637: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 121.251.93.58#20274: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 24.104.44.88#23336: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 119.150.51.199#8437: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 92.12.35.97#55673: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 66.70.220.236#24442: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 18.247.171.123#53097: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 107.205.171.181#33105: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 78.48.204.24#26234: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 73.52.107.198#64558: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 15.69.210.99#61165: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 39.47.93.102#43460: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 5.65.55.240#16498: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 68.18.205.222#21508: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 128.236.221.133#56671: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 77.72.147.216#11370: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 49.212.253.82#24316: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 66.254.251.100#32610: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 91.74.37.67#55767: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 112.102.110.83#19745: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 85.165.163.23#19555: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 14.136.98.212#32228: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 67.97.28.244#41398: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 60.217.137.235#415: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 41.120.87.227#43219: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 31.28.113.137#44481: no more recursive clients: quota reached
Jul  8 07:14:39 petersoft named[3263]: client 105.44.182.212#34606: no more recursive clients: quota reached

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