Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
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Cisco IronPort AsyncOS 7.6 for Email Configuration Guide
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Chapter 3 Setup and Installation
Public Listener
Note
The following examples of creating a public and private listener apply to X1050/1060/1070,
C650/660/670, and C350/360/370 customers only. Cisco IronPort C150/160 customers should skip to
the next section
C650/660/670, and C350/360/370 customers only. Cisco IronPort C150/160 customers should skip to
the next section
.
In this example portion of the
systemsetup
command, a public listener named InboundMail is
configured to run on the PublicNet IP interface. Then, it is configured to accept all email for the domain
example.com
. An initial SMTP route to the mail exchange
exchange.example.com
is configured. Rate
limiting is enabled, and the maximum value of 4500 recipients per hour from a single host is specified
for the public listener.
for the public listener.
Note
The value you enter for maximum recipients per hour you are willing to receive from a remote host is a
completely arbitrary value, one that is usually relative to the size of the enterprise for which you are
administering email. For example, a sender who sends 200 messages in an hour might be considered a
“spammer” (sender of unsolicited bulk email), but if you are configuring the Cisco IronPort appliance
to handle all email for a 10,000 person company, 200 messages per hour from a remote host may be a
reasonable value. Conversely, in a 50-person company, someone sending 200 messages in an hour to you
may be an obvious spammer. You must choose an appropriate value when you enable rate-limiting on a
public listener (throttle) inbound email for your enterprise. For more information on Default Host Access
policies, see
completely arbitrary value, one that is usually relative to the size of the enterprise for which you are
administering email. For example, a sender who sends 200 messages in an hour might be considered a
“spammer” (sender of unsolicited bulk email), but if you are configuring the Cisco IronPort appliance
to handle all email for a 10,000 person company, 200 messages per hour from a remote host may be a
reasonable value. Conversely, in a 50-person company, someone sending 200 messages in an hour to you
may be an obvious spammer. You must choose an appropriate value when you enable rate-limiting on a
public listener (throttle) inbound email for your enterprise. For more information on Default Host Access
policies, see
The default host access policy for the listener is then accepted.
You are now going to configure how the IronPort C60 accepts mail by
creating a "Listener".
Please create a name for this listener (Ex: "InboundMail"):
[]> InboundMail
Please choose an IP interface for this Listener.
1. Management (192.168.42.42/24: mail3.example.com)
2. PrivateNet (192.168.1.1/24: mail3.example.com)
3. PublicNet (192.168.2.1/24: mail3.example.com)
[1]> 3
Enter the domains or specific addresses you want to accept mail for.
Hostnames such as "example.com" are allowed.