RE: Query on the Overload control mechanism for DNS Server

2017-04-30 Thread Philippe.Simonet
Hi you should take a look at http://dnsdist.org/, that can easyly run as dns proxy on the same machine as named. Philippe -Original Message- From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of ramkishor...@gmail.com Sent: dimanche, 30 avril 2017 15:05 To: comp-p

Re: Query on the Overload control mechanism for DNS Server

2017-04-30 Thread Alberto Colosi
Use isc RRL feature if are simple queries no mass bombing query, plan a LB structure as per RFC (dead DNS swirching) is not designed for load issues and can't solve it. when a query is performed from a remote dns is supposed to be putted inside cache ! so if u r not an ISP you cold only use i

Re: Query on the Overload control mechanism for DNS Server

2017-04-30 Thread Sebastian Büttner
Hi Kishore, you can indeed do so with iptables for example. Have a look at the hashlimit or the limit module. They are both capable of limiting per protocol, per dest or source ip and can be configured to trigger only after reaching a burstlimit. You can enforce a udp packet rate which is all

Re: Query on the Overload control mechanism for DNS Server

2017-04-30 Thread Ram Kishore B
Thanks for the quick response. Is it possible to rate limit the number of packets per second to allow for a specific iptables rule especially of *UDP*? If yes, our partial requirement will be sufficed. Only difficulty I can think at the moment of using this rule is, the peers will not be indi

Re: Query on the Overload control mechanism for DNS Server

2017-04-30 Thread Sebastian Büttner
Hi, is there any reason for what you are not performing this rate limiting using some firewall like iptables/netfilter? You could limit the incoming requests at this point with ease and the nameserver would never get in touch with dropped requests thus not waste cpu time. Also this approach