The source group will include the sources entered below. Enter
one per line.
The names of the sources will be matched against the given
shell-style regular expression. The valid wildcards are
"*" and "?".
The names of the sources will be matched against the given
POSIX extended regular expression. These behave like "grep -E".
Please consult
regex(7) manpage for the full syntax.
Query EC2 for a list of instances that satisfy the specifications
listed below. The query is done every 10 minutes. Policy should permit
"ec2:DescribeInstances" action.