Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain scio-198-15-3-49.static.smt-net.com is not the root of its zone.
Instead, try zone transfer on smt-net.com .
Instead, try zone transfer on smt-net.com .