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On Fri, Jan 18, 2019 at 12:07 PM Ben Croswell wrote:As long as all 4 DNS servers are running the same version, my first suggestion would be to check firewalls for dropped packets.Some FW/IPS drop packets with edns versions other 0 because they see it as an attack. This can [...]
Fri, Jan 18, 2019, Continue reading at the source
Good point as I did not think in terms of an IPS checking for that as well. In our case the firewall in question is acting as a simple packet filter so based on what you state, I should be able to allow for larger packet sizes for DNS queries [...]
Fri, Jan 18, 2019, Continue reading at the source
On Jan 18, 2019, at 9:18 AM, Ben Croswell wrote:I shouldn't have posted so closely to responding to the other user.Oh, my mistake. How is this for a definitve statement?BIND 9 was designed to be EDNS compliant from very beginning. All currently-supported branches of BIND 9 are EDNS-compliant. [...]
Fri, Jan 18, 2019, Continue reading at the source

Last modified: January 25, 2018 at 10:18 am