telnet unable to connect to remote host connection refused linux

Behavior: Displays a hint that the connection rejects the connection when viewing the listening state.[Email protected] ~]$ lsnrctl statusLsnrctl for linux:version 11.2.0.1.0-production on 30-oct-2015 21:48:08Copyright (c) 1991, Oracle. All rights reserved.Connecting to (Address= (PROTOCOL=TCP) (host=) (port=1521))Tns-12541:tns:no ListenerTns-12560:tns:protocol A

$reader.performio (Socketinputstream.java:55) at Org.apache.hadoop.net.SocketIOWithTimeout.doIO (Socketiowithtimeout.java:142) at Org.apache.hadoop.net.SocketInputStream.read (Socketinputstream.java:155) at Org.apache.hadoop.net.SocketInputStream.read (Socketinputstream.java:128) at Java.io.FilterInputStream.read (Filterinputstream.java:133) at Org.apache.hadoop.ipc.client$connection$pinginputstream.read (Client.java:364) at Java.io.BufferedInputStrea

Telnet is a virtual terminal protocol in the TCP/IP protocol cluster. It allows you to connect to a remote host. By using the Telnet command, the remote device can be used as a virtual terminal for

"telnet 192.168.1.252", press enter, and enter the id and password in linux. I have a question: Why can't I use root to log on? After login, you can use su root to convert to root login, strange? The solution is found: In the vi/etc/pam. d/login file, add a # sign in front of auth required/lib/security/pam_securetty.so, and comment it out. 4. telnet XP in

The Remote Operation server has multiple connection methods, such as ftp and telnet, but it is plain text transmission, which poses a great risk to the server. My favorite is SSH connection. SSH Secure Shell, encrypted transmission, and compressed data, so the transmission efficiency is higher. Configuration File:/etc/

The Telnet protocol is the standard protocol for the Internet remote Login service, which provides users with the ability to perform remote host work on the local computer. Many end users are accustomed to using a Telnet session on a computer to remotely control the server.

root user can be remotely logged on after removal) Mv/etc/securetty/etc/securetty.bak for the sake of insurance, Move files to backup, not directly deleted Install the Telnet service configured for Windows, go to Control Panel---Programs and features, click Enable or disable Windows features, locate Telnet and tick OK to install Open windows command line cmd, type the

Remote access to the telnet command in linux-Linux Enterprise Application-Linux server application information. See the following for details. Telnet is an essential remote logon comman

interoperability.User Password Authentication LoginThe SSHD service has been installed and started by default on the REDHAT7 system, and then the SSH command is used on the client computer to connect remotely.[[emailprotected] ~]$ ssh [emailprotected] //ssh远程登录lisi用户的服务器The authenticity of host ‘192.168.10.70 (192.168.10.70)‘ can‘t be established.ECDSA key fingerprint is 93:8e:e7:3f:9a:22:6f:66:3a:f7:57:

Use telnet to manage remote Linux servers and telnetlinux servers SSH requires public/private key pair configuration, which is cumbersome. In order to quickly log on to a remote Linux host from any device, you can use

This time in the study of the locomotive of the storage tutorial, in the "Configuration login information and database (MySQL)" Connection, the "Server connection Error host ' XXX ' is not allowed to connect to" "error. Like this error, is a typical remote permissions proble

nasty!Someone could is eavesdropping on your right now (Man-in-the-middle attack)!It is also possible, the RSA host key has just been changed.The fingerprint for the RSA key sent by the remote host isc4:8b:39:c7:25:ff:dd:e3:8f:56:d4:d6:1b:8b:98:5b.Please contact your system administrator.Add correct host key in/root/.