Default Port

Protocol

In/Out

Hostname

Purpose

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 Knowledge Base.

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.

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

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

and McAfee definitions.

80

HTTP

Out

updates.ironport.com

AsyncOS upgradesand McAfee definitions.

80

HTTP

Out

TAXII servers

Used to allow your email gateway to consume external threat feeds.

82

HTTP

In

AsyncOS IPs

Used for viewing the spam quarantine.

83

HTTPS

In

AsyncOS IPs

Used for viewing the spam quarantine.

110

TCP

Out

POP server

POP authentication for end users for spam quarantine.

123

UDP

In & Out

NTP server

NTP if time servers are outside firewall.

143

TCP

Out

IMAP server

IMAP authentication for end users for spam quarantine.

161

UDP

In

AsyncOS IPs

SNMP Queries.

162

UDP

Out

Management station

SNMP Traps.

389 or

3268

LDAP

Out

LDAP servers

LDAP if LDAP directory servers are outside firewall. LDAP authentication for Cisco Spam Quarantine.

636 or 3269

LDAPS

Out

LDAPS

LDAPS — ActiveDirectory’s global catalog server (uses SSL).

443

TCP

In

AsyncOS IPs

Secure HTTP ( https ) access to the GUI for system monitoring.

443

TCP

Out

res.cisco.com

Verify the latest files for the update server.

443

TCP

Out

update-manifests.ironport.com

Obtain the list of the latest files from the update server (for physical hardware email gateways.)

443

TCP

Out

update-manifests.sco.cisco.com

Obtain the list of the latest files from the update server (for virtual email gateways.)

443

TCP

Out

phonehome.senderbase.org

Receive/send Outbreak Filters.

443

TCP

Out

In the command-line interface, run the websecurityadvancedconfig command and accept all defaults. The Web security service hostname is shown.

Cloud service for obtaining URL reputation and category information for URL filtering.

443

TCP

Out

As configured in Security Services > File Reputation and Analysis, Advanced Settings for File Reputation section, Cloud Server Pool parameter.

If configured, the port for access to cloud services for obtaining file reputation. The default port is 32137. For file analysis services, see port 443.

443

TCP

Out

As configured in Security Services > File Reputation and Analysis, Advanced Settings for File Analysis section.

Access to cloud services for file analysis. For file reputation services, see port 443 or 32137.

443

TCP

In & Out

As configured in Security Services > File Reputation and Analysis, Advanced Settings for File Reputation section, AMP for Endpoints Console Integration parameter.

api.amp.sourcefire.com

api.eu.amp.sourcefire.com

api.apjc.amp.sourcefire.com

api.amp.cisco.com

api.eu.amp.cisco.com

api.apjc.amp.cisco.com

Access to AMP for Endpoints console servers.

443

TCP

In & Out

outlook.office365.com login.microsoftonline.com.

Access to Office 365 services for mailbox auto remediation.

443

TCP

Out

aggregator.cisco.com

Access to the Cisco Aggregator server.

443

HTTPS

Out

logapi.ces.cisco.com

To upload the debug logs that are collected by Cisco TAC.

443

HTTPS

Out

TAXII servers

Used to allow your email gateway to consume external threat feeds.

514

UDP/TCP

Out

Syslog server

Syslog logging.

628

TCP

In & In

AsyncOS IPs

QMQP if injecting email from outside firewall.

990

TCP/FTP

Out

support-ftp.cisco.com

To upload the debug logs that are collected by Cisco TAC.

1024 and higher

—

—

—

See information above for Port 21 (FTP.)

2222

CCS

In & In

AsyncOS IPs

Cluster Communication Service (for Centralized Management).

TCP

Out

AsyncOS IPs

Cisco Spam Quarantine.

7025

TCP

In and out

AsyncOS IPs

Pass policy, virus, and outbreak quarantine data between Cisco Secure Email Gateways and Cisco Secure Manager Email and Web Gateways when this feature is centralized.