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Cisco Cisco Email Security Appliance C160 Mode D'Emploi

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D-1
Cisco AsyncOS 9.0 for Email User Guide
 
A P P E N D I X
 
D
Firewall Information
The following table lists the possible ports that may need to be opened for proper operation of the Cisco 
appliance (these are the default values).
Table D-1
Firewall Ports 
Port
Protocol
In/Out
Hostname
Description
20/21
TCP
In or Out
AsyncOS IPs, FTP Server FTP for aggregation of log files. 
Data ports TCP 1024 and higher must 
also all be open. 
For more information, search for FTP 
port information in the Knowledge 
Base. See 
. 
22
TCP
In
AsyncOS IPs
SSH access to the CLI, aggregation of 
log files.
22
TCP
Out
SSH Server
SSH aggregation of log files.
22
TCP
Out
SCP Server
SCP Push to log server
23
Telnet
In
AsyncOS  IPs
Telnet access to the CLI, aggregation of 
log files.
23
Telnet
Out
Telnet Server
Telnet upgrades, aggregation of log 
files (not recommended).
25
TCP
Out
Any
SMTP to send email.
25
TCP
In
AsyncOS IPs
SMTP to receive bounced email or if 
injecting email from outside firewall.
53
UDP/TCP
In & Out
DNS Servers
DNS if configured to use Internet root 
servers or other DNS servers outside 
the firewall. Also for SenderBase 
queries.
80
HTTP
In
AsyncOS IPs
HTTP access to the GUI for system 
monitoring.
80
HTTP
Out
downloads.ironport.com
Service updates, except for AsyncOS 
upgrades and McAfee definitions.
80
HTTP
Out
updates.ironport.com
AsyncOS upgrades and McAfee 
Anti-Virus definitions.