Telnet is not working in ubuntu 14.04
Do you have any idea? On another machine I installed the same way and it worked there, but now on my machine it is not working. Please help me to solve this problem. I also tried to restart Xinetd but it was not helpful.
I think you need to reboot for the firewall changes to take effect. You at least have to restart the ufw service. Try sudo ufw 23 to just allow it and then sudo service ufw restart to restart the firewall.
1 Answer 1
Configure the /etc/inetd.conf file manually by adding the line «telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd» to it with elevated permissions.
Then, configure the /etc/xinetd.conf file manually by adding
log_type = SYSLOG authpriv
to the default settings section (with elevated permissions).
Restart the telnet server by running the commnd «sudo /etc/init.d/xinetd restart».
When you finish, use the command «telnet -tln» to check to see if the telnet server successfully opened a socket for you on Port 23
If so, you should see a line in the output that looks like the following:
TCP 0 0 (your local address):23 0.0.0.0:* LISTENING
If so, run ifconfig to grab the IPv4 and take that over to your other machine (running the telnet client). In that terminal run «telnet (the IPv4 you wrote down)». If everything’s configured correctly (it may take a few seconds depending on your connection speed) it should connect and prompt you for a username/password. Enter them and you’re in.
настройка Telnet соединения
Здравствуйте! Нужно соединить два компьютера с помощью Telnet. На обоих стоит Ubuntu 12.04. Компьютеры соединены патчкордом напрямую. Пингуется все отлично в обе стороны. Но при попытке сделать telnet соединение выдает ошибку:
telnet 192.168.0.3 Trying 192.168.0.3. telnet: Unable to connect to remote host: Connection refusedМне подсказали, что возможно причина в фаерволе, поэтому на обоих компьютерах я выполнил команду:
Однако ничего не изменилось. Подскажите пожалуйста, в чем может быть проблема и как ее исправить. Заранее спасибо!
Telnet — это клиент. Подумай о запуске сервера на другой стороне соединения.
Проблема может быть в том, что Ubuntu по умолчанию не поднимает сервер Telnet’а на 23 порту.
Расскажите пожалуйста, как его поднять? В гугле ничего внятного найти не смог. Видимо очень уж старая технология, что информации в сети почти не осталось
В гугле ничего внятного найти не смог.
Вторая ссылка в гугле http://miku.acm.uiuc.edu/ по telnet server.
Какой толстый суббкотний ОП, взоржал с треда 🙂
Никак. Telnet умер. Используй ssh.
hostA# apt-get install openssh-serverНет, вру. Уже нашел, но все инструкции старые и файлы о которых там говориться (например /etc/inetd.conf или /etc/init.d/inetd) на моей системе просто отсутствуют
~$ aptitude show nyancat-server Package: nyancat-server New: yes State: not installed Version: 1.2.1-1 Priority: extra Section: misc Maintainer: Jonathan McCrohan Uncompressed Size: 46.1 k Depends: nyancat (>= 1.2.1-1), openbsd-inetd | inet-superserver, reconf-inetd Conflicts: telnetd Description: Animated terminal Nyancat server configurations nyancat-server contains the configuations required to quickly set up a nyancat server. This allows the animated poptart cat to be served to many users via telnet. Installing this package will automatically configure and activate a nyancat telnet server. Homepage: https://github.com/klange/nyancat telnet command not found on CentOS, RHEL, MacOS – Fixed
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How to get telnet working on CentOS/RHEL and MacOS?
telnet is not available by default on a higher version of CentOS/RHEL and MacOS. But that doesn’t mean you can’t get it installed.
When you run telnet, you will notice the following error.
[root@instance-1 ~]# telnet -bash: telnet: command not found [root@instance-1 ~]#To fix this, you need to install telnet and it’s easy.
Installing telnet on CentOS/RHEL
You can also use DNF if using CentOS 8.
It’ll download the package and install and show you the complete confirmation below.
Downloading packages: telnet-0.17-64.el7.x86_64.rpm | 64 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : 1:telnet-0.17-64.el7.x86_64 1/1 Verifying : 1:telnet-0.17-64.el7.x86_64 1/1 Installed: telnet.x86_64 1:0.17-64.el7 Complete![root@instance-1 ~]# telnet telnet>Installing telnet on MacOS
To install telnet on MacOS, you need to have/install Homebrew.
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core'. remote: Enumerating objects: 4947, done. remote: Counting objects: 100% (4947/4947), done. remote: Compressing objects: 100% (4748/4748), done. remote: Total 4947 (delta 49), reused 337 (delta 7), pack-reused 0 Receiving objects: 100% (4947/4947), 3.99 MiB | 3.17 MiB/s, done. Resolving deltas: 100% (49/49), done. Tapped 2 commands and 4731 formulae (4,989 files, 12.4MB). Already up-to-date. ==> Installation successful!Great, its time to install telnet using brew command
Chandans-iMac:~ chandan$ telnet telnet>Want to build a career in Sysadmin? Check out this Linux administration online course.
Telnet Server not starting
I am installing Ubuntu Server 13.10 and cant get telnet working on the server. I have installed both xinet.d & telnetd thru apt-get and restarted xinetd but nothing is started when I do a netstat -l . In googling, the trouble I see mention of adding telnet stream tcp wait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd line to /etc/inetd.conf . I have no inetd.conf . I see that inetd has been depracated and I put the line in xinetd.conf and restarted xinetd service but still no telnet listening. Can someone advise me on what the proper settings for the telnet server and what files they should be in. Here is the content of my xinetd.conf file:
# 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 >includedir /etc/xinetd.d #:STANDARD: These are standard services. telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd Why are you using telnet? It is an obsolete and insecure protocol. Use ssh instead: it’s secure, faster ( uses compression ) and has other nifty features, like the ability to forward ports.
You seem to think that /etc/inetd.conf and xinetd.conf use the same format. Have you read man xinetd , man -k xinetd , man inetd , man -k inetd , man telnetd ? Does /etc/default/telnetd exist? Have you done grep telnet /var/log/* ?