Cisco Cisco Email Security Appliance C690 ユーザーガイド
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Cisco AsyncOS 8.0.2 for Email User Guide
Chapter 21 Configuring Routing and Delivery Features
Configuring Mail Gateways for all Hosted Domains Using Virtual Gateway™ Technology
Figure 21-13
Four Virtual Gateway Addresses on One Ethernet Interface
Note that four separate IP interfaces can be used to deliver mail, where only one public listener is
configured to accept messages from the Internet.
configured to accept messages from the Internet.
Mapping Messages to IP Interfaces for Delivery
The
altsrchost
command provides the simplest and most straightforward method to segment each
Cisco appliance into multiple IP interfaces (Virtual Gateway addresses) from which to deliver email.
However, users requiring more power and flexibility in mapping messages to particular Virtual Gateways
should investigate the use of message filters. See
However, users requiring more power and flexibility in mapping messages to particular Virtual Gateways
should investigate the use of message filters. See
The
altsrchost
command allows you to control which IP interface or interface group to use during
email delivery based on one of the following:
•
the sender’s IP address
•
the Envelope Sender address
To specify which IP interface or interface group the system will deliver email from, you create mapping
keys that pair either the sender’s IP address or the Envelope Sender address to an IP interface or interface
group (specified by interface name or group name).
keys that pair either the sender’s IP address or the Envelope Sender address to an IP interface or interface
group (specified by interface name or group name).
Cisco AsyncOS will compare both the IP address and Envelope Sender address to the mapping keys. If
either the IP address or Envelope Sender address matches one of the keys, the corresponding IP interface
is used for the outbound delivery. If there is no match, the default outbound interface will be used.
either the IP address or Envelope Sender address matches one of the keys, the corresponding IP interface
is used for the outbound delivery. If there is no match, the default outbound interface will be used.
The system can match any of the following keys and take preference in the following order:
Ethernet interface: Data 2
Ethernet interface: Data 1
IP interface: PrivateNet (e.g. 192.168.1.1)
IP interface:
PublicNet3
192.168.2.3
IP interface:
PublicNet
192.168.2.1
IP interface:
PublicNet2
192.168.2.2
IP interface:
PublicNet4
192.168.2.4
SMTP
SMTP
SMTP
SMTP
Public
InboundMail
listener:
SMTP
Sender’s IP address
The IP address of the sender must match exactly.
Example:
192.168.1.5
Fully-formed Envelope
Sender
Sender
The Envelope Sender must match the entire address exactly.
Example:
username@example.com