On 7/5/25 19:17, Jeff Sumner wrote:
Apologies for the lack of clarity.
We performed a major F5 upgrade recently – for which we were delegating
some zones from our ISC BIND servers (just Plain Old NS record
delegation) and ever since then, clients using nslookup and host, which
query the BIND servers (the recursers) are getting back both the correct
A records as well as two SERVFAILS as the AAAA and MX record queries
error out (both nslookup and host query those record types in addition
to the A record query)– both of which cause the log emissions that we
see in this string. Can see the F5s handing back incorrect data in the
sniffer – so the BIND servers are acting correctly – the F5s are not.
We’re working that through.
OK, thanks!
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