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Operating Systems AIX PING to AIX works but TELNET FTP SSH doesn't work Post 303031668 by filosophizer on Monday 4th of March 2019 04:16:38 AM
Old 03-04-2019
PING to AIX works but TELNET FTP SSH doesn't work

Code:
root@PRD /> rsh DR
KFAFH_DR: protocol failure due to unexpected closure from server end

root@PRD /> telnet DR
Trying...
Connected to DR.
Escape character is '^]'.
Connection closed.

root@PRD /> ftp DR
Connected to KFAFH_DR.
421 Service not available, remote server has closed connection
ftp> bye

root@PRD /> ssh 10.10.10.42
ssh_exchange_identification: Connection closed by remote host

root@PRD /> telnet 10.10.10.42
Trying...
Connected to 10.10.10.42.
Escape character is '^]'.

#1 It was working: no services were taken down

#2 Suddenly couldn't connect

#3 After 1 hour, was able to telnet

How to identify the problem?
 

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RXTELNET(1)						    BSD General Commands Manual 					       RXTELNET(1)

NAME
rxtelnet -- start a telnet and forward X-connections. SYNOPSIS
rxtelnet [-l username] [-k] [-t telnet_args] [-x xterm_args] [-K kx_args] [-w term_emulator] [-b telnet_program] [-n] [-v] host [port] DESCRIPTION
The rxtelnet program starts an xterm window with a telnet to host host. From this window you will also be able to run X clients that will be able to connect securely to your X server. If port is given, that port will be used instead of the default. If setting up the X forwarding failes, rxtelnet will still telnet in to the remote host, but without X forwarding. The supported options are: -l Log in on the remote host as user username. -k Disables keep-alives. -t Send telnet_args as arguments to telnet. -x Send xterm_args as arguments to xterm. -X Send kx_args as arguments to kx. -w Use term_emulator instead of xterm. -b Use telnet_program instead of telnet. -n Do not start any terminal emulator. -v Be verbose. EXAMPLE
To login from host foo (where your display is) to host bar, you might do the following. 1. On foo: rxtelnet bar 2. You will get a new window with a telnet to bar. In this window you will be able to start X clients. SEE ALSO
kx(1), rxterm(1), telnet(1), tenletxr(1), kxd(8) KTH_KRB March 7, 2004 KTH_KRB
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