! means on iptables

["Julius Wijaya" <wijayaj@xxxxxxx>]

iptables rule chain:

iptables -A FORWARD -i eth1 -p tcp \
	   -s ! 172.16.30.185 \
	   -d www.yahoo.com -j DROP

if i am not mistaken that rules means to drop all connection to
www.yahoo.com except from address 172.16.30.185

is this correct?

regards.
JW