Cisco Cisco Email Security Appliance C160 用户指南
Chapter 6 Using Message Filters to Enforce Email Policies
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Cisco IronPort AsyncOS 7.3 for Email Advanced Configuration Guide
OL-23081-01
Note
You must issue the
commit
command for filters to take effect.
Three types of parameters are:
Table 6-10
Filter Management Parameters
seqnum
An integer representing a filter based on its position in the list of
filters. A seqnum of
filters. A seqnum of
2
represents the second filter in the list, for
example.
filtname
The colloquial name of a filter.
range
A range may be used to represent more than one filter, and appears in
the form of X
the form of X
-
Y, where X and Y are the first and last seqnums that
identify the extent. For example,
2-4
represents filters in the second,
third, and fourth positions. Either X or Y may be left off to represent
an open-ended list. For example,
an open-ended list. For example,
-4
represents the first four filters, and
2-
represents all filters except the first. You can also use the keyword
all
to represents all the filters in the filter list.
Creating a New Message Filter
new [seqnum|filtname|last]
Specifies the position at which to insert the new filter(s). If omitted, or given the
keyword
keyword
last
, the filters entered in are appended to the list of filters. No gaps in
the sequence numbers are allowed; you are not allowed to enter a seqnum outside
the boundaries of the current list. If you enter an unknown filtname, you are
prompted to enter a valid filtname, seqnum, or
the boundaries of the current list. If you enter an unknown filtname, you are
prompted to enter a valid filtname, seqnum, or
last
.
After a filter has been entered, you may manually enter the filter script. When you
are finished typing, end the entry by typing a period (
are finished typing, end the entry by typing a period (
.
) on a line by itself.
The following conditions can cause errors:
•
Sequence number beyond the current range of sequence numbers.
•
Filter with a non-unique filtname.
•
Filter with a filtname that is a reserved word.
•
Filter with a syntax error.