I want to very SMTP connectivity from an AS400 in a VM to a mailserver on port 25
The native telnet command on the as400 does not seem to support a port specification.
Any ideas how to telnet from as400 to port 25 on my mailserver?
I can ping the mailserver from the as400
I can telnet in from other boxes (non as400)
I just tried this on an i5/OS V5R4:
TELNET RMTSYS(hostname) ASCOPRMOD(*VT100) PORT(25)
I also found an IBM manual about telnet support in V5R2 that suggests you can also specify a port in older versions.
Type "TELNET" on the command line, press F4, fill out the remote system name, press F10, page down, page down, locate "Port" field. Change it from "*DFT" to "25". Press Enter.
When done, press F9 to get the corresponding command line invocation.
Related
I need to telnet host but command prompt and Powershell both are blocked in my system by company policy.
Also I tried to do it in telnet.exe using below command but it shows only connecting and no further output.
Command:- o hostname port
Please help and share alternate way.
I just recently got into whatever you might call this stuff. I was just trying to send a java file over to the computer I ssh to. But when I went to do it, I just get told
sh: connect to host port 22: Connection timed out
lost connection
If possible I would like it explained very simply because of how new I am to this kind of stuff.
SSH to remote host(VM Ubuntu) from VS code terminal
Install VS Code with Remote Development extension pack.
Install Virtual machine (Virtual box) and Ubuntu running on it.
Check Ubuntu-Network-Settings-IPv4 address (10.0.2.15-default for VM).
Go to your virtual box Settings-Network-NAT Adapter (double-check).
Go to your virtual box Settings-Network-In Advanced-Port Forwarding.
Add this as given below and click ok and hereafter consider 127.0.1.1 for ssh.
portforwardinginVM
View the status and disable firewall settings in Ubuntu VM (ufw command).
In VS Code, View-Command Palette- Add new SSH host .
Add ssh username#127.0.1.1 and enter.
Or go to the terminal window (eg. Powershell) and type ssh username#127.0.1.1, it will ask if you want to update to host lists permanently, asking like yes/no and also your Ubuntu password to confirm.
Now try to connect to the host using username#127.0.1.1 and selecting OS like Ubuntu, then type the Ubuntu password.
That's it you are logged in to your virtual machine and can access files now from your local machine.
It has no response when I use command:
telnet taobao.com 80
I use termux.apk on my phone.
Try with
telnet
And after
open taobao.com 80
If cursor is blinking indefinitely, the port is open and listening. Otherwise no.
I am trying to connect to another windows system using telnet as follows:
1.I open cmd.
2.type "telnet"
3.then type telnet "ip-address of remote system" e.g telnet 15.228.40.25.14
Now when I hit enter get error as:
Could not open connection to the host, on port 23:connect failed
So, please suggest how do i resolve it.
Try to make the telnet connection as
telnet 192.168.10.10 3333
without using :
What you did is correct, but the other computer has to be running a telnet server for you to connect to it on port 23.
How would I access a webserver behind a firewall? I'm developing an application for this webserver which is not yet open to the public.
Someone walked me through this before, so I know it can be done. However, it has been about four months and I haven't been able to do it again.
I'm using Putty to connect to the remote machine. From that machine I can open the site http://dev.server.address:83 using Firefox. However, I want to be able to open http://localhost:80 on my machine to see the same page.
I'm using the server address and port 83 for the "source port"
I'm using localhost:80 for the "destination port"
You need to enter "80" into Source port and dev.server.address:83 to Destination.
[And don't forget to click the "Add" button before you leave the configuration screen. If you don't click that, PuTTY doesn't actually create a tunnel. I fell for that gotcha quite a few times myself]
Have you tried using 127.0.0.1:80 instead of localhost:80? I don't use PuTTY, but when I use SSH on my machine, I have to specify 127.0.0.1 instead of localhost.
Do you have a webserver running on your local machine? If that is listening on port 80 http://localhost:80 wont work. Alternatively try mapping the source to a different port (12345 for eg.) and then try http://localhost:12345 in your browser.
On Linux you can also make it happen with:
$ ssh -f -R 83:localhost:80 user#dev.server.address
Provided that you have an SSH account named "user".