OAC - Computação/CEEI/UFCG

1971	Intel launched the 4004
1981	IBM introduced the IBM PC
1992	Intel becomes the largest semicondoctor supplier in the world
2004	Intel hits the thermal wall
2015	Intel buys Altera and launches FPGA+ARM chip fabricated by Intel
2021	Intel launches RISC-V soft IP core

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IBM Z

What is IBM Z ?

After registering for MTM or z/OS Introduction and Workshop, You receive an email instructing You to use a TN3270 emulator to connect to an IBM Mainframe computer. This connection uses port 23 (telnet) which is blocked by our firewall at UFCG.

In order to solve the problem, this port forwarding code is helpfull.

In the following instructions, substitute Z##### for the ID assigned to You by IBM which You can find in the aforementioned email. Substitute 192.##.##.## for the IBM Lab IP address which You can also find in the aforementioned email

Test if somebody else already started port forwarding: use x3270 and connect to 192.##.##.##:2323 instead of just 192.##.##.## If this does not work, proceed to next step to install and start port forwarding.
Test ssh access using the command:
```
ssh Z#####@192.##.##.##
```
You will be asked for a password. Your initial password is in the email. At Your first login You need to change that password. I am not sure if this can be done via ssh. I am sure it can be done using the TN3270 emulator, but that port is blocked. Ask me for help to solve that chicken-and-egg problem - I can start port forwarding on my account or connect from UFCG to my computer at home and let You do the first login.
If the ssh connections works, hit Ctrl-D to get back.
Download the port forwarding code and do:
```
scp portforward.c Z#####@192.##.##.##:
```
Do not miss the ":" at the end of the command.
Connect again using
```
ssh Z#####@192.##.##.## 
```
At the IBM Z Unix prompt compile the forwarding code:
```
c89 -o portforward portforward.c 
```
Start it:
```
portforward 2323 localhost 23
```
and let this terminal window as it is.
In another window, launch x3270 and connect to 192.##.##.##:2323

The next time You need portforward, only the last two steps are necessary.