Cisco Cisco Email Security Appliance C690 User Guide
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Cisco IronPort AsyncOS 7.5 for Email Daily Management Guide
OL-25138-01
Chapter 9 Testing and Troubleshooting
Troubleshooting the Listener
Troubleshooting the Listener
If you suspect problems with injecting email, use the following strategies:
•
Confirm the IP address that you are injecting from, and then use the
listenerconfig
command to check for allowed hosts.
Is the IP address allowed to connect to the listener you have created? Use the
listenerconfig
command to examine the Host Access Table (HAT) for the
listener. Use these commands to print the HAT for a listener:
listenerconfig
->
edit
-> listener_number ->
hostaccess
->
print
The HAT can be configured to refuse connections by IP address, block of IP
addresses, hostname, or domains. For more information, see “Specifying
Hosts that are Allowed to Connect” on page 107.
addresses, hostname, or domains. For more information, see “Specifying
Hosts that are Allowed to Connect” on page 107.
You can also use the
limits
subcommand to check the maximum number of
connections allowed for a listener:
listenerconfig
->
edit
-> listener_number ->
limits
•
On the machine that you are injecting from, use Telnet or FTP to manually
connect to the appliance. For example:
connect to the appliance. For example:
You can also use the
telnet
command within the appliance itself to connect
from the listener to the actual appliance:
injection_machine% telnet appliance_name
mail3.example.com> telnet
Please select which interface you want to telnet from.
1. Auto
2. Management (192.168.42.42/24: mail3.example.com)
3. PrivateNet (192.168.1.1/24: mail3.example.com)
4. PublicNet (192.168.2.1/24: mail3.example.com)