Netstat PORTList/-o report
Displays the list of reserved ports and the port access control configuration for unreserved ports. To configure port access control for unreserved ports, replace the port number value with the keyword UNRSV. For more information about port access control see the port access control information in z/OS Communications Server: IP Configuration Guide. For ports that are reserved by the PORTRANGE profile statement, only one output line is displayed for each range. For ephemeral port specifications, see the Netstat CONFIG/-f report description.
TSO syntax
Target
Provide the report for a specific TCP/IP address space by using TCp tcpname. See The Netstat command target for more information about the TCp parameter.
Output
The default output option displays the output on the user's terminal. For other options, see The TSO NETSTAT command syntax or Netstat command output.
z/OS UNIX syntax
Target
Provide the report for a specific TCP/IP address space by using -p tcpname. See The Netstat command target for more information about the TCp parameter.
Output
The default output option displays the output to z/OS UNIX shell stdout. For other options, see The z/OS UNIX netstat command syntax or Netstat command output.
Filter description
- POrt/-P portnum
- Filter the output of the PORTList/-O report using the specified port number portnum or the keyword UNRSV. You can enter up to six filter values. The port number range is 1-65535.
Command syntax examples
From TSO environment
NETSTAT PORTLIST
Display the port reservation list in the default TCP/IP stack.
NETSTAT PORTLIST TCP TCPCS6
Display the port reservation list in the TCPCS6 stack.From UNIX shell environment
netstat -o
netstat -o -p tcpcs6 Report examples
The following examples are generated by using TSO NETSTAT command. Using the z/OS UNIX netstat command displays the data in the same format as the TSO NETSTAT command.
Not IPv6 enabled (SHORT format)
NETSTAT PORTLIST
MVS TCP/IP NETSTAT CS V2R1 TCPIP Name: TCPCS 15:24:23
Port# Prot User Flags Range IP Address SAF Name
----- ---- ---- ----- ----- ---------- --------
UNRSV TCP A* L
UNRSV TCP * FL GENERIC
00020 TCP FTPD1 D
00021 TCP FTPD1 DA
00023 TCP TCPCS DA
00025 TCP SMTP DA
04000 TCP OMVS DABU 9.67.113.10
04001 TCP OMVS DABFU 9.67.113.12 BS4TOMVS
04004 TCP * DAF S4TALL
04005 TCP * DABU 9.67.113.11
04017 TCP * DABFU 9.67.113.17 BS4TALL
04020 TCP DCICSTS DAN
05000 TCP * DARN 05000-05001
UNRSV UDP * XI
00161 UDP OSNMPD DA
00162 UDP OMVS DA
00514 UDP SYSLOGD1 DA
04020 UDP OMVS DABF 9.67.43.70 BS4UOMVS
04030 UDP * DAF S4UALL
05000 UDP MUD DAR 05000-05002 IPv6 enabled or request for LONG format
NETSTAT PORTLIST
MVS TCP/IP NETSTAT CS V2R1 TCPIP Name: TCPCS 15:24:23
Port# Prot User Flags Range SAF Name
----- ---- ---- ----- ----- --------
UNRSV TCP * FL GENERIC
00020 TCP FTPD1 D
00021 TCP FTPD1 DA
00023 TCP TCPCS DA
00025 TCP SMTP DA
04000 TCP OMVS DABU
BindSpecific: 9.67.113.10
04001 TCP OMVS DABFU BS4TOMVS
BINDSPECIFIC: 9.67.113.12
04002 TCP OMVS DABU
BindSpecific: ::6:2900:1dc:21bc
04020 TCP DCICSTS DAN
05000 TCP * DARN 05000-05001
UNRSV UDP * FI GENERIC
00514 UDP SYSLOGD1 DA
04020 UDP OMVS DAB
BindSpecific: 9.67.43.70
04022 UDP * DAB
BindSpecific: 1::8
04030 UDP * DA
05000 UDP MUD DAR 05000-05002 Report field descriptions
Display the following port reservation information defined in the PORT or PORTRANGE profile statements. For more information about each field, see the PORT or PORTRANGE profile statements in the z/OS Communications Server: IP Configuration Reference.
- Port#
-
- nnnn
- For ports reserved by the PORT profile statement, this value is the number of the port that was reserved. For ports that are reserved by the PORTRANGE profile statement, this value is the number of the first port in the range. Valid values are in the range 1 – 65535.
- UNRSV
- Indicates any unreserved port; that is, any port number in the range 1-65535 that has not been reserved by a PORT or PORTRANGE statement. For applications that explicitly bind to an unreserved port and match the protocol and jobname value on this PORT statement, permission to access the unreserved port is controlled according to the value of the flags for that entry. However, when the RESTRICTLOWPORTS parameter is configured on the TCPCONFIG or UDPCONFIG profile statement, access only to unreserved ports with port numbers greater than 1023 is controlled by the PORT UNRSV statements.
- Prot
- The protocol that was specified in the PORT profile statement. The valid protocol values are TCP and UDP.
- User
- The MVS™ job name that can use the port. See Client name or User ID descriptions in Netstat report general concept for detailed descriptions.
- Flags
- The flags represent parameter values defined on the PORT or PORTRANGE
profile statement.
- A
- Autolog
- B
- Bind
- D
- DelayAcks
- F
- SAF
- I
- WhenBind
- L
- WhenListen
- N
- Port is disabled for SMC-R. For more information about SMC-R support, see Shared Memory Communications over Remote Direct Memory Access in the z/OS Communications Server: IP Configuration Guide.
- R
- Port is reserved by range.
- S
- Share port
- U
- Reuse port. This flag is set for TCP sockets when the BIND keyword is specified (both B and U are set).
- W
- Shareport with WLM server-specific weights is being used.
- X
- Deny
- Range
- This field is significant only for port entry reserved by the PORTRANGE profile statement (flag R in the Flags field).
- IP address or BindSpecific
- This field is significant only for port entries with the BIND parameter specified on the PORT profile statement.
- SAF Name
- The final qualifier of a security product resource name.