telnet

Telnet IAC command answering

由 梦想的初衷 提交于 2019-11-30 14:12:58
问题 I'm trying to negotiate a telnet connection with a socket. The socket is working,but the server is telling me that thing: ÿýÿýÿûÿû login: The ÿýÿýÿûÿû means 255 253 1 255 253 31 255 251 1 255 251 3 I read all the RFC docs but I don't understand what should I respond with to be able to send (string ascii data?) to the server, my wish is to run the login prompt successfully and then send commands to a server like "halt" or something else. Thanks in advance for your answer. 回答1: From RFC 854:

hadoop - Connection refused on namenode

由 烈酒焚心 提交于 2019-11-30 13:05:16
I've searched web and stackoverflow for a long time but it was not useful. I have installed hadoop yarn 2.2.0 in 2 node cluster setup. but something goes wrong. when I start hadoop daemons using start-dfs.sh and start-yarn.sh on master node, they successfully run in master and slave (my master's hostname is RM and my slave's hostname is slv). they can ssh each other successfully. but when I want to run a job, this error appears: 14/01/02 04:22:53 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 14/01/02 04:22:56

华为防火墙实现远程管理的方式及配置详解

由 做~自己de王妃 提交于 2019-11-30 11:38:20
关于网络设备或是服务器，管理人员几乎很少会守着设备进行维护及管理，最普遍、应用最广泛的就是——远程管理。下面简单介绍一下华为防火墙管理的几种方式。 博文大纲： 一、华为防火墙常见的管理方式； 二、各种管理方式配置详解； 1.通过Console线进行管理； 2.通过Telnet方式管理； 3.通过Web方式登录设备； 4.配置SSH方式登录设备； 一、华为防火墙常见的管理方式 提到管理，必然会涉及到AAA的概念，我们首先来了解一下——AAA。 AAA概述 AAA是验证、授权和记账三个英文单词的简称。是一个能够处理用户访问请求的服务器程序，主要目的是管理用户访问网络服务器，为具有访问权限的用户提供服务。 其中： 验证：哪些用户可以访问网络服务器； 授权：具有访问权限的用户可以得到哪些服务，具有什么样的权限； 记账：如何对正在使用网络资源的用户进行审计； AAA服务器通常同网络访问控制、网关服务器、数据库及用户信息目录等协同工作。若要访问网络资源，首先要进行用户的入网认证，这样才能访问网络资源。鉴别的过程就是验证用户身份的合法性；鉴别完成后，才能对用户访问网络资源进行授权，并对用户访问网络资源进行计费管理。 网络设备的AAA认证方式有本地验证、远程身份验证两大类。 本地验证就是将用户和密码在本地创建并验证； 远程身份验证通过各个厂商自由的AAA服务器来完成

网络初级篇之配置telnet登录网络设备（实验）

由 别说谁变了你拦得住时间么 提交于 2019-11-30 10:55:58
一、作用 在日常工作中，登录网络设备，对其进行配置主要有几种方式：console、Telnet与ssh。这样可以实现远程（只要网络可达）控制，极大的方便了工作。今天主要讲解一下配置Telnet登录设备。 二、配置过程 通过两个实验熟悉一下配置过程，我这里配置云设备使用电脑进行测试。 AR1的基本配置 <Huawei>system-view [Huawei]sysname AR1 [AR1]interface GigabitEthernet 0/0/0 [AR1-GigabitEthernet0/0/0]ip address 192.168.159.20 24 一般有两种配置方式：AAA认证模式与password认证模式 来进行配置，这里分别实验一下。 1、AAA认证模式配置 AR1的配置： //开启telnet服务（有的默认开启） [AR1]telnet server enable //设置最大同时可登录个数（可不配置默认是5） [AR1]user-interface maximum-vty 5 //配置虚拟接口 [AR1]user-interface vty 0 4 //配置用户终端的身份验证模式为aaa认证 [AR1-ui-vty0-4]authentication-mode aaa //配置vty支持telnet协议 [AR1-ui-vty0-14]protocol

Telnet IAC command answering

由 霸气de小男生 提交于 2019-11-30 09:15:47
I'm trying to negotiate a telnet connection with a socket. The socket is working,but the server is telling me that thing: ÿýÿýÿûÿû login: The ÿýÿýÿûÿû means 255 253 1 255 253 31 255 251 1 255 251 3 I read all the RFC docs but I don't understand what should I respond with to be able to send (string ascii data?) to the server, my wish is to run the login prompt successfully and then send commands to a server like "halt" or something else. Thanks in advance for your answer. From RFC 854 : Since the NVT is what is left when no options are enabled, the DON'T and WON'T responses are guaranteed to

Python - inheriting from old-style classes

由 五迷三道 提交于 2019-11-30 07:45:19
问题 I am trying to connect via telnet to a laboratory instrument. I'd like to extend the Telnet class from the telnetlib module in the standard library, to include functions specific to our instrument: import telnetlib class Instrument(telnetlib.Telnet): def __init__(self, host=None, port=0, timeout=5): super(Instrument,self).__init__(host, port, timeout) All I am trying to do in this code is inherit the __init__ method from the parent class ( telnetlib.Telnet ) and pass on the standard arguments

java simple telnet client using sockets

由 Deadly 提交于 2019-11-30 04:40:03
问题 I have read plenty of things on the topic, how telnet is a protocol, not a simple socket connection, waiting for newline characters, use of external libraries and whatnot... The bottom line is that I need a quick and dirty java telnet application up and running, not necessarily scalable and not necessarily pretty, so I'm trying to avoid the use of libraries, system function calls and the like. I have been trying and testing and so far, when trying to log into a router (through telnet of

How to unsupress local echo

由 好久不见. 提交于 2019-11-30 03:09:30
问题 I am trying to suppress the local echo of a password in a telnet session by sending 0xFF 0xFD 0x2D (IAC DO SUPPRESS_LOCAL_ECHO). This works fine. My trouble is enabling the local echo after the password. I am sending 0xFF 0xFE 0x2D (IAC DONT SUPPRESS_LOCAL_ECHO). But I don't see any of my commands that I type afterwards. I am using the MS Telnet program to connect. The IAC is describe here. The Suppress Local Echo is defined here 回答1: During your telnet sessions in telnet.exe you can pop up

Accessing CouchDB Futon on a remote server

由 浪尽此生 提交于 2019-11-30 02:05:51
I've installed CouchDB on a remote server that I have access to through a terminal telnet/ssh client. The server is running on CentOS6. I really want to be able to work with Futon, but I cannot at the moment because I can only open localhost:5984 in the ssh client. Any suggestions on how to work around this? Just create ssh tunnel to your remote CouchDB instance: ssh -f -L localhost:15984:127.0.0.1:5984 user@remote_host -N And after that your remote CouchDB Futon that still serve on localhost address will be available for you by address: http://localhost:15984/_utils . Replace local port 15984

Linux启动telnet

由 若如初见. 提交于 2019-11-30 00:39:54
一、安装telnet软件包(通常要两个）。 　　1、 telnet-client (或 telnet)，这个软件包提供的是 telnet 客户端程序； 　　2、是 telnet-server 软件包，这个才是真正的 Telnet server 软件包！ 　　安装之前先检测是否这些软件包已安装，方法如下： [root @localhost ~]# rpm -q telnet telnet-0.17-38.el5 telnet客户端一般默认情况是已安装 [root @localhost ~]# rpm -q telnet-server 无表示未安装 二、安装telnet-server 把两个rpm包拷到linux下，进入到包的目录下。 运行命令安装： [root @localhost cdrom]# rpm -ivh --force xinetd-2.3.14-10.el5.x86_64.rpm warning: CentOS/xinetd-2.3.14-10.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID e8562897 Preparing... ########################################### [100%] 1:xinetd ##############################
订阅 telnet