Ibm i access client solutions and required ports

Ibm i access client solutions and required ports how to#
Ibm i access client solutions and required ports windows#

You can then get the down-вЂn-dirty details on each telnet session connection by simply taking an option вЂ8вЂ™ (вЂњDisplay jobsвЂќ) alongside each connection. How about all those telnet users that you currently have attached to your system, who are they and what is their precise source IP address and are they just sitting there at a sign-on screen or are they signed-on to the system as well? Just look at the вЂњEstablishedвЂќ connections for local port 23 (telnet) and you can see that there are currently 4 devices that have an active telnet session to the system, and the IP address of each workstation connected is shown under the вЂњRemote AddressвЂќ column.

The screen now appears like this, with local port numbers being shown and the connections being ordered in ascending sequence by local port number, perfectвЂ¦ДЇrom the screen above, you can immediately ascertain some very useful information with a single glance, for example, local port 21 (FTP) is in a вЂњListenвЂќ state so right away you know that the FTP host server function on your IBM i is currently active. Then, you can press F13 to sort by a screen column of your choosing and selecting the вЂњLocal PortвЂќ column with a вЂњ1вЂќ in the pop-up window as shown here and then pressing the keyвЂ¦ For example, pressing F14 on the initial display shown above results in the port numbers being displayed as shown hereвЂ¦ Pressing the F14 key allows you to conveniently toggle between вЂњDisplay port namesвЂќ (the default initial view) and вЂњDisplay port numbersвЂќ (my personal preference). This can be accomplished easily via the F14 key вЂњDisplay port numbersвЂќ and the F13 key вЂњSort by columnвЂќ. When I first invoke this screen, I like to always do two things: (1) display all the port numbers, and (2) set the screen to display in вЂњlocalвЂќ port number sequence. What this screen is showing you is every TCP/IP port currently open on your system, and, every connection your system has to a remote host, basically a very comprehensive birds-eye view of what doors your system has open and who has come in through those doors and is currently in-the-house. When you enter into the вЂњWork with IPv4 connection statusвЂќ screen, it initially appears like thisвЂ¦ The most useful option off of the вЂњWork with TCP/IP Network StatusвЂќ menu is option #3 вЂњWork with IPv4 connection statusвЂќ which you can also invoke directly with the NETSTAT or WRKTCPSTS commands by simply specifying the OPTION(*CNN) parameter on either of those commands, and it is the functions available with that option that I will focus on in this article. My own personal preference is to use the NETSTAT command instead of the WRKTCPSTS command simply because itвЂ™s two fewer characters for me to type and I have that higher primate tendency to be lazy on occasion! Just a wild guess on my part so donвЂ™t quote me on that one. So IBM just threw that same NETSTAT command on the IBM i and made it point to the same menu on the system that the WRKTCPSTS points to.

Ibm i access client solutions and required ports windows#

IвЂ™ve often wondered why our good friends at IBM gave us two commands that are identical in function, and my best guess is because there is a NETSTAT command-line interface (CLI) command in the Windows operating system world (Windows workstations and Windows servers), that has been around since Bill Gates was a 20-something-year-old, that provides information similar to what WRKTCPSTS provides in the IBM i world. Interesting to note that the title of the menu up top is вЂњWork with TCP/IP Network StatusвЂќ, and thatвЂ™s because there are two functionally identical commands that will get you to this main menu, NETSTAT, and WRKTCPSTS, as these menu prompts indicateвЂ¦ When you invoke the NETSTAT command from any command line using the default parameter of OPTION(*SELECT), it will present to you the main menu shown below. The NETSTAT command on your IBM i is the de facto go-to resource that you need to get a 360-degree view of whatвЂ™s going on with all the TCP/IP activity on your system, yet many clients that I work with have never even heard of it, and if they have heard of it they donвЂ™t really know what it does and the critical management capabilities that it offers.

Ibm i access client solutions and required ports how to#

Do you want to know, in real-time, who/what is connecting to the TCP/IP environment on your IBM i? Need to know how much data is going outbound and coming inbound for any specific TCP/IP connection, and have immediate access to a bunch of other cool IP environment metrics and capabilities and control? Well, the tool to do so is right at the tip of your fingers, and knowing how to use it is absolutely essential to the effective management of your IBM iвЂ™s network connectivity.