On Tue, May 16, 2023 at 11:27:52AM -0400, Alex via Postfix-users wrote: > > > $ host info.apr.gov.rs > > > Host info.apr.gov.rs not found: 2(SERVFAIL) > > There's definitely a problem with their name servers, but it also seems my > version of bind is not permissive enough for such failures, although my > bind-9.16.38 system is, using the same configuration.
The problems with their DNS are: - ns1.apr.gov.rs: EDNS(0) option intolerance, but returns FORMERR, so fallback to non-EDNS queries should (and does) work. $ dig -t a +nocomment +nocookie +nostats +nocmd +norecur +nocl +nottl @ns1.apr.gov.rs info.apr.gov.rs. ;info.apr.gov.rs. IN A info.apr.gov.rs. A 195.178.56.17 Disabling use of cookies in your BIND configuration would suffice. - ns2.apr.gov.rs: Supports EDNS(0), but returns SERVFAIL to all queries. $ dig -t a +noall +comment +norecur +noedns +nocl +nottl @ns2.apr.gov.rs info.apr.gov.rs. ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 42971 ;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 > Public name servers also appear to have no issues. I'm currently > researching these FORMERR messages. Turn off coookies for queries to this domain, or generally. -- Viktor. _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org