Denotes the type of address range being defined.
sourceAddrFilter: a range of IP addresses used to detect packets
which need traditional NAT forwarding.
translationPool: for traditional NAT forwarding, a range of
IP addresses from which translation addresses are picked.
domainSrcAddrFilter: a range of IP addresses used to detect domain
specific packets which need domain specific NAT forwarding.
domainTransPool: for domain specific NAT forwarding, a range of
IP addresses from which domain specific translation addresses
are picked.