This object contains the state of NAT IPv4 Inspect/Fix up DNS.
NAT DNS packet inspection and fix up consists of parsing DNS
request or response packets, identifying IP addresses contained
within that may need to be NAT'ed, and fixing up the DNS packet
with the appropriate NAT translations.
- `disabled', NAT does not inspect DNS packets that are being
forwarded by the NAT process.
- `enabled', NAT inspects DNS packets that are being forwarded
by the NAT process.