Hello all, Is tfo (TCP Fast Open) supposed to work with forward-zone, tls-upstream servers? I see that tfo works when unbound attempts recursive (tcp) queries itself, but when it uses a forward-addr for the query, tfo is not attempted.
I'm running unbound 1.9.0 configured with --enable-tfo-client and -server. I confirmed the same behavior in version 1.8.3 as well. Has anyone else successfully used tfo with a forward-addr tls upstream server?