On 3/24/22 4:34 PM, Carl Byington via bind-users wrote:
Yes, the disconnect was my brain. I will try to plug that back in.
;-) We've all had those days. Most of us will have them again.
How do you do that in /etc/hosts?
It's been a while, so I'm relying on memory, a.k.a. lossy media.
/etc/hosts:
a.b.c.d outbound.example.com
Really that simple. Forward lookup would search names (right hand
side). Reverse lookup would search the IPs (left hand side).
Maybe this is somewhat dependent on the stub resolver library on the system and / or the system itself. It's been 5-15 years since I've last done this. It could be very likely that things were quite different 25 years ago.
For some users, for some (possibly all) senders, we require that d.c.b.a .in-addr.arpa has some PTR record where the corresponding A record resolves back to a.b.c.d.
There is also a key difference in what you've said vs what I've said. You seem to be using DNS specific terminology while I'm using host generic name resolution. The former doesn't support /etc/hosts while the latter does.
-- Grant. . . . unix || die
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