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telnet el 16.04

tag-icon • tag-icon 16.04 connection localhost telnet
telnet el 16.04

Tengo un sistema en ejecución xenialy necesito verificar si determinados puertos están abiertos, 127.0.0.1así que decidí instalarlo telnetpara simplemente intentar conectarme en ese puerto en particular.

I've tried the following:
ron@regDesktopHome:/etc/ssl/certs$ sudo apt-get install telnetd -y
Reading package lists... Done
Building dependency tree       
Reading state information... Done
telnetd is already the newest version (0.17-40).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
ron@regDesktopHome:/etc/ssl/certs$ sudo systemctl status inetd
● xinetd.service - LSB: Starts or stops the xinetd daemon.
   Loaded: loaded (/etc/init.d/xinetd; bad; vendor preset: enabled)
   Active: active (running) since Sun 2019-06-09 18:02:19 PDT; 10min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2050 ExecStop=/etc/init.d/xinetd stop (code=exited, status=0/SUCCESS)
  Process: 2062 ExecStart=/etc/init.d/xinetd start (code=exited, status=0/SUCCESS)
    Tasks: 1
   Memory: 192.0K
      CPU: 22ms
   CGroup: /system.slice/xinetd.service
           └─2080 /usr/sbin/xinetd -pidfile /run/xinetd.pid -stayalive -inetd_compat -inetd_ipv6

Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing daytime
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing daytime
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing discard
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing discard
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing echo
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing echo
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing time
Jun 09 18:02:19 regDesktopHome xinetd[2080]: removing time
Jun 09 18:02:19 regDesktopHome xinetd[2080]: xinetd Version 2.3.15 started with libwrap loadavg options compiled in.
Jun 09 18:02:19 regDesktopHome xinetd[2080]: Started working: 1 available service
ron@regDesktopHome:/etc/ssl/certs$ telnet 127.0.0.1
Trying 127.0.0.1...
telnet: Unable to connect to remote host: Connection refused
ron@regDesktopHome:/etc/ssl/certs$

¿Qué pasa aquí? ¿Por qué no puedo conectarme localhost telnet?

Respuesta1

nmapy lsofson sólo dos de las mejores formas de comprobar un puerto.

Para ver los puertos 1-100,

sudo nmap -p1-100 localhost

Para ver qué proceso tiene el puerto 80abierto,

lsof -i tcp:80

Por supuesto, lee man nmap;man lsof.

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