CMM ports

The Lenovo Chassis Management Module 2 modules use a variety of TCP/IP ports for communication. This topic lists these ports and indicates the ones that are fixed or can be changed by an administrator. You need to make sure that your network allows communications through these ports for the Lenovo Chassis Management Module 2 modules to function and communicate correctly.

Note

The CMM HTTP and HTTPS ports are open at all times. Port behavior is determined by the CMM HTTPS port setting, which can be affected by the CMM chassis security policy setting:

When the CMM HTTPS port is enabled, the HTTP port (port 80) remains open and redirects to the HTTPS port (port 443). When the chassis security policy is set to secure, the CMM HTTPS port is automatically enabled and its setting cannot be changed.
When the CMM HTTPS port is disabled, the HTTPS port (port 443) remains open and redirects to the HTTP port (port 80).

Table 1. User configurable Lenovo Flex System Enterprise Chassis ports. The parts listing table is a three-column table that TCP/IP ports for the Lenovo Flex System Enterprise Chassis Types 8721, 8724, and 8725 option. Column 1 identifies the port name. Column 2 gives the port number. Column 3 provides a description.
Port name	Port number	Description
CIM/XML HTTPS	5989 (default)	CIM/XML HTTPS used by management applications
FTP	21 (default)	FTP
FTP Data	20 (default)	FTP Data
http	80 (default)	Web server HTTP connection - TCP
https	443 (default)	SSL connection for HTTP-TCP
Secure TCP Command Mode	6091 (default)	Secure TCP Command Mode used by management applications
SLP	427 (default)	Service location protocol - UDP
SNMP agent	161 (default)	SNMP get/set commands - UDP
SNMP traps	162 (default)	SNMP traps
SSH	22 (default)	Secure Shell (SSH) command-line interface - TCP
TCP Command Mode	6090 (default)	TCP Command Mode
telnet	23 (default)	Telnet command-line interface connection -TCP
TFTP	69 (default)	TFTP

Note

The LDAP server port (port 389) is used only with the STARTTLS protocol extension to provide an equivalent to LDAPS port 636. Unsecure access to the LDAP server port is disabled: if a secure SSL connection is not established, connection to port 389 is refused. Port 389 is the default port for the CMM internal interface. Port 636 the default port for the CMM external interface.

Table 2. Fixed Lenovo Flex System Enterprise Chassis ports. The parts listing table is a two-column table that TCP/IP ports for the Lenovo Flex System Enterprise Chassis Types 8721, 8724, and 8725 option. Column 1 identifies the port number. Column 2 provides a description.
Port number	Description
25	E-mail alerts - TCP
53	DNS resolver - UDP
67 and 68	DHCP - UDP
123	NTP
389	LDAP server port
547	DHCP (IPv6) - UDP
623	RMCP (Remote Management and Control Protocol)
636	LDAPS (secure LDAP)
830	NETCONF (Network Configuration Protocol) Note If an I/O module supports the NETCONF protocol, port 830 is open by default.

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