Cisco Cisco Email Security Appliance X1070 Guía Para Resolver Problemas
The Cisco Email Security Appliance (ESA) is a SMTP gateway appliance − it listens on port 25 by default.
The appliance can be configured to listen on another port for smtp traffic instead of 25.
(GUI>Network>Listeners>Edit Listener>Port setting)
(GUI>Network>Listeners>Edit Listener>Port setting)
Should your appliance be listening for mail on a non−standard port, you can perform a telnet test specifying
the optional port in place of 25. In our example below our mail host is listening on port 80.
the optional port in place of 25. In our example below our mail host is listening on port 80.
In order to use a port other than 25 when using telnet to connect to a remote host, simply specify the port
number following the hostname from the CLI:
number following the hostname from the CLI:
esa.example.com> telnet mail2.example.com 80
Trying 172.19.0.94...
Connected to mail2.example.com.
Escape character is '^]'.
Alternately, the AsyncOS CLI will prompt you to enter a host and port if you simply enter telnet, then follow
the prompts.
the prompts.
Updated: Aug 07, 2014
Document ID: 118195