telnet

What is the Keypress code for TAB button press

不羁的心 提交于 2019-12-25 02:34:40
问题 I am working on TCP IP client code which is sending commands to the server for some task to execute.This is for the first time working on So many commands.I know to writing commands to next line we used to write /r/n like this.. byte[] port2 = Encoding.ASCII.GetBytes("port2\r\n"); stream.Write(port2, 0, port2.Length); Now i have got a command which i need to embed using "{TAB}" button.Actually before to this i was using telnet in c# which is executing this command like this.. System.Windows

Telnet to a cloud instance from outside

老子叫甜甜 提交于 2019-12-24 16:35:15
问题 I have a cloud MS window instance on EC2. I want to telnet this instance from my own machine (outside). What I did: 1- turned off the MS firewall 2- turned on the telnet client and telnet service in the instance.. Now from my machine, if the public ip address for the cloud instance is 80.8.8.9. then, on the the cmd terminal from outside. I wrote telnet 80.8.8.9 where It said that the connection is failed. What I am missing, what is the wrong thing I did.. 回答1: Make sure you go to AWS

swoole连接失败

二次信任 提交于 2019-12-24 16:14:09
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 使用浏览器或者TCP调试工具链接不上去几种诊断几种思路: 1、php -m 检查有swoole 扩展 2、查看默认防火墙状态(关闭后显示not running,开启后显示running) firewall-cmd --state 查看防火墙是否关闭 3、查看是否有自己的执行文件在执行 ps -ajft 4、使用telnet 进行链接测试 telnet 127.0.0.1 9502 yum install telnet ctrl+】退出进程 5、如果以上都没有问题 去服务器看看安全组中是否有swoole_server("0.0.0.0",9502);指定的端口号 来源: oschina 链接: https://my.oschina.net/u/4427610/blog/3146665

linux远程登录(使用Telnet、SSH)

◇◆丶佛笑我妖孽 提交于 2019-12-24 15:33:31
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 系统:RHEL 5.5 64位,使用CentOS的yum源并作更新处理 一、Telnet(远程登录推荐SSH) 1、安装、启动Telnet 1.1、安装和启动一般需要两个包: telnet-client提供客户端程序 telnet-server提供服务器端程序 1.2、安装之前,确定是否已经安装Telnet [root @localhost Server]# rpm -qa|grep telnet telnet-server-0.17-39.el5 telnet-0.17-39.el5 说明已经安装,若未安装,可挂载RHEL5.5的DVD光盘镜像,在Server文件夹下找到并安装下面三个包: [root @localhost Server]# rpm -ivh xinetd-2.3.14-10.el5.x86_64.rpm #先安装这个包 [root @localhost Server]# rpm -ivh telnet- telnet-0.17-39.el5.x86_64.rpm telnet-server-0.17-39.el5.x86_64.rpm #这两个包的安装顺序是从左到右依次安装 1.3、启动: 方法一: 用# setup命令,选择系统服务,在里面找到Telnet,用空格键选中(前面加*)

利用tcp_wrappers 保护服务安全

我的梦境 提交于 2019-12-24 15:33:17
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 网络并不比大多数操作系统更安全。虽然没有任何系统能保证100%安全,但一些安全措施可以增强系统的安全性,网络也是如此。当设计安全措施时,你需要从影响安全的两个方面考虑:用户的意外操作和入侵。 意外事件的产生主要是用户缺乏培训或不想遵守程序流程。如果安全策略过于繁琐,工作将变成一种折磨,你的用户就会回避的你的策略。密码规则过于严格,用户也许会把密码写到他们的办公桌上。 当入侵者侵入你的系统后,他(她)会寻找所感兴趣的信息,如信用卡。有些人或许只想让你的系统垮掉。你可以采取一些措施来保证你的网络安全。监控最近产生的 Red Hat 错误表。使用 yum,保证 Red Hat 系统包升级到最新。 在工作中: Red Hat 已经将up2date用yum替换掉, RHEL5 依然保留了 Red Hat Network 注册和管理工具如:rhn_register 和 rhn_check。如果你使用Fedora Core 6 或 CentOS,Red Hat Network 是不可用的。幸运的是,Red Hat 考试不会考到与 Red Hat Network 有关的知识。 在这章稍后部分,你可以通过 /etc/hosts.allow 和 /etc/hosts.deny 文件来管理你的系统对特定请求的响应

Beanstalkd / Pheanstalk security issue

馋奶兔 提交于 2019-12-24 14:02:03
问题 I have just started using beanstalkd and pheanstalk and I am curious whether the following situation is a security issue (and if not, why not?): When designing a queue that will contain jobs for an eventual worker script to pick up and preform SQL database queries, I asked a friend what I could do to prevent an online user from going into port 11300 of my server, and inserting a job into the queue himself and hence causing the job to be executed with malicious code. I was told that I could

ubuntu server telnet 服务(转)

僤鯓⒐⒋嵵緔 提交于 2019-12-24 13:57:14
1、安装xinetd 以及telnetd # apt-get install xinetd telnetd 2、配置文件/etc/inetd.conf #cat /etc/inetd.conf (如果存在就不需要了) telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd 3.修改/etc/xinetd.conf # cat xinetd.conf # Simple configuration file for xinetd # # Some defaults, and include /etc/xinetd.d/ defaults { # Please note that you need a log_type line to be able to use log_on_success # and log_on_failure. The default is the following : # log_type = SYSLOG daemon info instances = 60 log_type = SYSLOG authpriv log_on_success = HOST PID log_on_failure = HOST cps = 25 30 } includedir /etc

SSH and Telnet library for java

大兔子大兔子 提交于 2019-12-24 12:07:02
问题 I'm building a Java application who connects to hosts using telnet or ssh, execute a command and then return the output. I've been using org.apache.commons.net.telnet.TelnetClient and written my own parsers so far. But I want to work less and do more. Can someone recommend any SSH or telnet libraries that is easy to configure and use? It would be great if have some sort of expect functionality. 回答1: Try JSch it is good for telnet and ssh related stuff. 回答2: JTelnet 来源: https://stackoverflow

How to connect/telnet to SPOP3 server using java (Sockets)?

家住魔仙堡 提交于 2019-12-24 08:35:53
问题 In case of POP3 it is possible to connect via telnet using sockets over port 110, But how to do it , if SPOP3 is implemented. With normal telnet it can be done quite easily with Socket pop3Socket = new Socket(host.com, 110); FYI: For connecting to SPOP3 we use in linux/unix openssl s_client -connect servername.com:995 回答1: You'll need to use the SSLSocket class. An example can be found at: http://www.herongyang.com/JDK/SSL-Socket-Client-Example-SslSocketClient.html. Basically, you'll do

阿里云telnet 3306端口失败

旧时模样 提交于 2019-12-24 07:16:28
在阿里云的服务器上安装了MySQL, 然后远程访问总是不通。 查询了很久,排查思路如下: 检查mysql是否启动 检查本机3306端口是否处于监听状态 检查阿里云控制台是否开启了安全限制 检查mysql用户能否在远程进行登录 mysql 的 bind-address 设置为 127.0.0.1 我们来一步步排查。 mysql是否启动 这个比较简单, ps -ef | grep mysql 如果能看到对应的进程就是没有问题的 检查本机3306端口是否处于监听状态 可以通过netstat -tlanp | grep 3306 来看mysql是否在监听。 如果本地端口监听状态 telnet 127.0.0.1 3306 看看是否成功, 如果成功, 则 在远程 telnet 公网ip 3306 来判断一下是否成功, 如果成功说明没有问题, 如果失败,继续往下看 检查阿里云控制台是否开启了安全限制 阿里云默认是不会打开 3306端口的, 需要进行设置, 设置方法见: https://help.aliyun.com/document_detail/25471.html?spm=5176.11065259.1996646101.searchclickresult.42468fa7McebNN 检查mysql用户能否在远程进行登录 这个主要是在新建mysql用户的时候 授权ip需要填写 % ,