On 01/02/2020 06:11 AM, Per Jessen wrote:
I had that problem back around 5 years ago -- some dns servers are just running with more conservative settings.
Anyway, I include it in my bind setup...a file with entries like: server "cable.net.co" { edns-udp-size 512; }; server "catherineshefski.com" { edns-udp-size 512; }; server "chilan.com" { edns-udp-size 512; }; server "dehy.de" { edns-udp-size 512; }; server "dfwright.net" { edns-udp-size 512; }; Yeah, I came across that option too, but maintaining such a list seemed too much effort. Not that I can find anything to put in it :-)
Was going to automate it, but the static took care of most cases, so never bothered. But yeah -- that file is dated 2014 -- so it's been a problem for a while.
An update. It seems this was caused by a piece of equipment replaced by my cable company. And it also seems as they squeeze out the experienced higher-paid technicians, those left over are quite incompetent to correctly configure the cable-equipment. There was a recent outage at our head-end and something got replaced to fix it. An whatever it was remained misconfigured for quite a while flooding our system with with ipv6. (it seemed like they flipped the prefer ipv4/ipv6 switch so our system was left trying to run on that traffic until it squawked enough to get an ipv4 resolution from the cable co. DNS servers) I don't pretend to understand in detail the what or how, and why it gave my DNS fits other than my box was having to work a whole lot harder to get an address resolved in a form it understood that it normally did. They must of paid the smart folks to come back in and bail them out, because things have settled back to normal on my end (with no changes from me). Though the upside was I was forced back into the Bind9ARM.pdf which I hadn't had to browse though in quite a while.... -- David C. Rankin, J.D.,P.E. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org