DNS-server should not flake out if a EDNS version options are sent and yet EDNS is not supported but in a lot of cases this is not the case.
dnsflagday has a test and compliance that you can run against any domain and get the compliance results. They also have great collections and statistics.
running the test is simple, just add you domain
A pass or fail ( see fail below )
Details of the test results are provided on failures
So what do you do if you have a failure? Easy, you upgrade your dns-server !
Alternative; you can use the edns compliance checker at this URL link
https://ednscomp.isc.org/ednscomp/a768f12b06
NSE ( network security expert) and Route/Switching Engineer
kfelix -----a----t---- socpuppets ---dot---com
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