BIND has always required UDP and TCP 53 for proper functionality. It sometimes mistakenly believed that TCP is only for zone transfers but that is not the case.
On Mon, Feb 4, 2019, 8:46 AM Roberto Carna <robertocarn...@gmail.com wrote: > Dear, I have a BIND 9.10 public server and I have delegated some public > domains. > > When I test these domains with the EDNS tool offered in the DNS Flag Day > webpage, the test was wrong wit just UDP/53 port opened to Internet. > > After that, when I opened also TCP/53 port, the test was succesful. > > Please can you explain me the reason I have to open TCP/53 port to > Internet from February 1st to the future??? > > Really thanks, regards. > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users >
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