Cisco Cisco Email Security Appliance C390 사용자 가이드
Chapter 2 Using Email Security Monitor
Email Security Monitor Pages
2-22
Cisco IronPort AsyncOS 7.3 for Email Daily Management Guide
OL-23080-01
Notes on Time Ranges in the Mail Trend Graph
The Email Security Monitor feature constantly records data about the mail
flowing into your gateway. The data are updated every 60 seconds, but the display
shown is delayed by 120 seconds behind the current system time. You can “zoom
out” from the day view to the week, day, and month views of the same data.
Because the data is monitored in real time, information is periodically updated
and summarized in the database.
flowing into your gateway. The data are updated every 60 seconds, but the display
shown is delayed by 120 seconds behind the current system time. You can “zoom
out” from the day view to the week, day, and month views of the same data.
Because the data is monitored in real time, information is periodically updated
and summarized in the database.
The Email Security Monitor feature defines specific time ranges shown in
Table 2-1
Time Ranges Defined in the Email Security Monitor Feature
This time range selected in the GUI ...is defined as:
Hour
the last 60 minutes
Day
the last 24 hours + the last 60 minutes
Week
the last 7 days + the last day by hours
Month
the last 30 days + the last day by hours
Incoming Mail Details Listing
The top senders which have connected to public listeners of the appliance are
listed in the External Domains Received listing table at the bottom of the
Incoming Mail page, based on the view selected. Click the column headings to
sort the data. See
listed in the External Domains Received listing table at the bottom of the
Incoming Mail page, based on the view selected. Click the column headings to
sort the data. See
for an explanation of the various
categories.
The system acquires and verifies the validity of the remote host’s IP address (that
is, the domain) by performing a double DNS lookup. For more information about
double DNS lookups and sender verification, see the “Configuring the Gateway
to Receive Email” chapter in the Cisco IronPort AsyncOS for Email Configuration
Guide.
is, the domain) by performing a double DNS lookup. For more information about
double DNS lookups and sender verification, see the “Configuring the Gateway
to Receive Email” chapter in the Cisco IronPort AsyncOS for Email Configuration
Guide.
The Sender Detail listing has two views, Summary and All.
The Summary view shows the total number of attempted messages for each
sender, and includes a breakdown by category (the same categories as the
Incoming Mail Summary graph on the Overview page: number of clean messages,
stopped by reputation filtering, invalid recipients, spam detected, virus detected,
and stopped by content filter).
sender, and includes a breakdown by category (the same categories as the
Incoming Mail Summary graph on the Overview page: number of clean messages,
stopped by reputation filtering, invalid recipients, spam detected, virus detected,
and stopped by content filter).