Cisco Cisco Email Security Appliance X1070 故障排查指南

Contributed by Chris Haag and Enrico Werner, Cisco TAC Engineers.

Jul 18, 2014

Does the ESA have the equivalent of a "hosts" file?

On UNIX, Linux, and Windows, the "hosts" file is a local table that lists host names and their IP addresses on
a network. On some small networks, the hosts file is used as an alternative to DNS. 

Hosts files cannot be used as an alternative to DNS with the ESA; however, there is a command that can be
used to show a similar lookup table relevant to email routing. The ESA can be configured to redirect all email
for a particular domain to a different mail exchange (MX) host. It is possible to view and configure these
mappings from the AsyncOS CLI using the 

smtproutes

  command:

mail3.example.com> smtproutes

There are currently 1 routes configured.

Choose the operation you want to perform:

− NEW − Create a new route.

− DELETE − Remove a route.

− PRINT − Display all routes.

− IMPORT − Import new routes from a file.

− EXPORT − Export all routes to a file.

− CLEAR − Remove all routes.

[]> print

.example.com: exchange.example.com

ALL:

Updated: Jul 18, 2014

Document ID: 118010