Re: [semi-OT]Manejar SSH con cualquier usuario
El día 21 de febrero de 2013 15:16, Miguel Matos
<unefistanoche@gmail.com> escribió:
> Hagamos las pruebas:
>
> El día 21 de febrero de 2013 13:27, Camaleón <noelamac@gmail.com> escribió:
>> El Thu, 21 Feb 2013 13:10:20 -0430, Miguel Matos escribió:
>>
>>> Saludos a la lista. Esta es una "preguntonta" de dos partes. La más
>>> importante es esta: cuando me conecto a mi servidor casero con SSH con
>>> root funciona normal: me pide la clave de root e ingreso sin problemas,
>>> pero esto trae problemas. ¿Qué problemas? Este en particular: si bajo un
>>> paquete con root sólo puedo usarlo si hago root desde el servidor mismo.
>>> En pocas palabras: No me sirve.
>>
> 1)
>> Hum... a ver, podrías iniciar sesión como root y luego cambiarte a tu
>> usuario habitual con "su - usuario". Aunque lo normal es hacerlo al revés
>> pero que sepas que es posible :-)
>>
> De poder puedo, y si no se puede, no se puede.
> Con mi usuario normal:
> miguel@debian-LT:~$ su -root
> su: opción inválida -- r
> Usage: su [options] [LOGIN]
>
> Options:
> -c, --command COMMAND pass COMMAND to the invoked shell
> -h, --help display this help message and exit
> -, -l, --login make the shell a login shell
> -m, -p,
> --preserve-environment do not reset environment variables, and
> keep the same shell
> -s, --shell SHELL use SHELL instead of the default in passwd
>
> miguel@debian-LT:~$ su
> Contraseña:
> root@debian-LT:/home/miguel#
>
> Desde la terminal de root:
> root@debian-LT:/home/miguel# ssh 192.168.1.100
> root@192.168.1.100's password:
> Linux --------.-----.net 2.6.32-5-686 #1 SMP Sun Sep 23 09:49:36 UTC 2012 i686
> [oculto este dato por seguridad]
>
> The programs included with the Debian GNU/Linux system are free software;
> the exact distribution terms for each program are described in the
> individual files in /usr/share/doc/*/copyright.
>
> Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> permitted by applicable law.
> Last login: Thu Feb 21 10:57:43 2013 from [XXX]
> root@servidor:~# su -miguel
> su: opción inválida -- i
> Usage: su [options] [LOGIN]
>
> Options:
> -c, --command COMMAND pass COMMAND to the invoked shell
> -h, --help display this help message and exit
> -, -l, --login make the shell a login shell
> -m, -p,
> --preserve-environment do not reset environment variables, and
> keep the same shell
> -s, --shell SHELL use SHELL instead of the default in passwd
>
> root@servidor:~# su
> root@servidor:~#
>
> ¿hice algo malo?
El comando correcto sería:
su - miguel
>
> 2)
>>> Lo quiero hacer con mi usuario normal. Pero si trato de ingresar, me
>>> impide hacerlo (el típico "permission denied"). ¿Hay algo que deba hacer
>>> para ingresar con mi usuario normal?. Ya intenté con mi clave, la clave
>>> del usuario normal, la clave de root, ¡y nada! ¿Qué estoy haciendo mal?
>>
>> ¿Has tocado anteriormente la configuración sshd? Prueba a darle
>> verbosidad al comando a ver si te dice algo coherente ("ssh -vvv
>> usuario@equipo")
>
> Desde mi usuario normal:
> [voy a pegarlo todo, porque pastebin no me funciona]
> miguel@debian-LT:~$ ssh -vvv servidor@192.168.1.100
> OpenSSH_5.5p1 Debian-6+squeeze2, OpenSSL 0.9.8o 01 Jun 2010
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug1: Applying options for *
> debug2: ssh_connect: needpriv 0
> debug1: Connecting to 192.168.1.100 [192.168.1.100] port 22.
> debug1: Connection established.
> debug1: identity file /home/miguel/.ssh/id_rsa type -1
> debug1: identity file /home/miguel/.ssh/id_rsa-cert type -1
> debug1: identity file /home/miguel/.ssh/id_dsa type -1
> debug1: identity file /home/miguel/.ssh/id_dsa-cert type -1
> debug1: Remote protocol version 2.0, remote software version
> OpenSSH_5.5p1 Debian-6+squeeze2
> debug1: match: OpenSSH_5.5p1 Debian-6+squeeze2 pat OpenSSH*
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-6+squeeze2
> debug2: fd 3 setting O_NONBLOCK
> debug1: SSH2_MSG_KEXINIT sent
> debug1: SSH2_MSG_KEXINIT received
> debug2: kex_parse_kexinit:
> diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
> debug2: kex_parse_kexinit:
> ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-rsa,ssh-dss
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
> debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit: first_kex_follows 0
> debug2: kex_parse_kexinit: reserved 0
> debug2: kex_parse_kexinit:
> diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
> debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit: none,zlib@openssh.com
> debug2: kex_parse_kexinit: none,zlib@openssh.com
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit: first_kex_follows 0
> debug2: kex_parse_kexinit: reserved 0
> debug2: mac_setup: found hmac-md5
> debug1: kex: server->client aes128-ctr hmac-md5 none
> debug2: mac_setup: found hmac-md5
> debug1: kex: client->server aes128-ctr hmac-md5 none
> debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
> debug2: dh_gen_key: priv key bits set: 126/256
> debug2: bits set: 521/1024
> debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
> debug3: check_host_in_hostfile: host 192.168.1.100 filename
> /home/miguel/.ssh/known_hosts
> debug3: check_host_in_hostfile: host 192.168.1.100 filename
> /home/miguel/.ssh/known_hosts
> debug3: check_host_in_hostfile: match line 1
> debug1: Host '192.168.1.100' is known and matches the RSA host key.
> debug1: Found key in /home/miguel/.ssh/known_hosts:1
> debug2: bits set: 521/1024
> debug1: ssh_rsa_verify: signature correct
> debug2: kex_derive_keys
> debug2: set_newkeys: mode 1
> debug1: SSH2_MSG_NEWKEYS sent
> debug1: expecting SSH2_MSG_NEWKEYS
> debug2: set_newkeys: mode 0
> debug1: SSH2_MSG_NEWKEYS received
> debug1: Roaming not allowed by server
> debug1: SSH2_MSG_SERVICE_REQUEST sent
> debug2: service_accept: ssh-userauth
> debug1: SSH2_MSG_SERVICE_ACCEPT received
> debug2: key: /home/miguel/.ssh/id_rsa ((nil))
> debug2: key: /home/miguel/.ssh/id_dsa ((nil))
> debug1: Authentications that can continue: publickey,password
> debug3: start over, passed a different list publickey,password
> debug3: preferred
> gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
> debug3: authmethod_lookup publickey
> debug3: remaining preferred: keyboard-interactive,password
> debug3: authmethod_is_enabled publickey
> debug1: Next authentication method: publickey
> debug1: Trying private key: /home/miguel/.ssh/id_rsa
> debug3: no such identity: /home/miguel/.ssh/id_rsa
> debug1: Trying private key: /home/miguel/.ssh/id_dsa
> debug3: no such identity: /home/miguel/.ssh/id_dsa
> debug2: we did not send a packet, disable method
> debug3: authmethod_lookup password
> debug3: remaining preferred: ,password
> debug3: authmethod_is_enabled password
> debug1: Next authentication method: password
> servidor@192.168.1.100's password:
> debug3: packet_send2: adding 48 (len 63 padlen 17 extra_pad 64)
> debug2: we sent a password packet, wait for reply
> debug1: Authentication succeeded (password).
> debug1: channel 0: new [client-session]
> debug3: ssh_session2_open: channel_new: 0
> debug2: channel 0: send open
> debug1: Requesting no-more-sessions@openssh.com
> debug1: Entering interactive session.
> debug2: callback start
> debug2: client_session2_setup: id 0
> debug2: channel 0: request pty-req confirm 1
> debug1: Sending environment.
> debug3: Ignored env ORBIT_SOCKETDIR
> debug3: Ignored env SSH_AGENT_PID
> debug3: Ignored env GPG_AGENT_INFO
> debug3: Ignored env TERM
> debug3: Ignored env SHELL
> debug3: Ignored env XDG_SESSION_COOKIE
> debug3: Ignored env GTK_RC_FILES
> debug3: Ignored env WINDOWID
> debug3: Ignored env GNOME_KEYRING_CONTROL
> debug3: Ignored env GTK_MODULES
> debug3: Ignored env USER
> debug3: Ignored env LS_COLORS
> debug3: Ignored env SSH_AUTH_SOCK
> debug3: Ignored env SESSION_MANAGER
> debug3: Ignored env USERNAME
> debug3: Ignored env DESKTOP_SESSION
> debug3: Ignored env PATH
> debug3: Ignored env PWD
> debug3: Ignored env GDM_KEYBOARD_LAYOUT
> debug1: Sending env LANG = es_VE.utf8
> debug2: channel 0: request env confirm 0
> debug3: Ignored env GNOME_KEYRING_PID
> debug3: Ignored env GDM_LANG
> debug3: Ignored env GDMSESSION
> debug3: Ignored env SHLVL
> debug3: Ignored env HOME
> debug3: Ignored env GNOME_DESKTOP_SESSION_ID
> debug3: Ignored env LOGNAME
> debug3: Ignored env XDG_DATA_DIRS
> debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
> debug3: Ignored env WINDOWPATH
> debug3: Ignored env DISPLAY
> debug3: Ignored env XAUTHORITY
> debug3: Ignored env COLORTERM
> debug3: Ignored env _
> debug2: channel 0: request shell confirm 1
> debug2: fd 3 setting TCP_NODELAY
> debug2: callback done
> debug2: channel 0: open confirm rwindow 0 rmax 32768
> debug2: channel_input_status_confirm: type 99 id 0
> debug2: PTY allocation request accepted on channel 0
> debug2: channel 0: rcvd adjust 2097152
> debug2: channel_input_status_confirm: type 99 id 0
> debug2: shell request accepted on channel 0
> Linux --------.-----.net 2.6.32-5-686 #1 SMP Sun Sep 23 09:49:36 UTC 2012 i686
>
> The programs included with the Debian GNU/Linux system are free software;
> the exact distribution terms for each program are described in the
> individual files in /usr/share/doc/*/copyright.
>
> Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> permitted by applicable law.
> You have new mail.
> servidor@servidor:~$
>
> ¿Pego lo que me diga root? Mientras, intentaré descifrar lo que dice acá.
>
> 3) Según [1] me especifica que es posible editarlo para ampliar la
> seguridad, pero no voy a tocarlo hasta que me funcione bien con
> cualquier usuario, dice que sí.
>
>>
>>> La segunda es relacionada al correo. Si quiero darle a [SOLUCIONADO],
>>> ¿debo darle a reenviar o tengo que tomar el último escrito para que
>>> quede como a tod@s les gusta? La última vez que hice algo así a algunos
>>> no les gustó, y quiero dejarlos contentos para cuando termine el
>>> problema de arriba.
>>
>> No vas a poder contentar a todo el mundo >:-)
>>
>> Lo que yo hago es, al responder un hilo, editar el asunto y añadir
>> "[Solucionado] blah, blah...." con el [Solucionado] en primer lugar para
>> que sea vea antes, pero eso ya al gusto de cada cual.
>>
>> Saludos,
>>
>> --
>> Camaleón
>>
>>
>> --
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>> Archive: [🔎] kg5n5d$ihs$6@ger.gmane.org">http://lists.debian.org/[🔎] kg5n5d$ihs$6@ger.gmane.org
>>
> [1]http://tuxpepino.wordpress.com/2007/05/11/ssh-el-dios-de-la-administracion-remota/
> P.D.: si nada de esto me funciona como espero, tomaré la opción de
> TeamViewer o RealVNC.
>
> --
> Buen uso de las listas (como se ven en Debian):
> http://wiki.debian.org/es/NormasLista
> Ayuda para hacer preguntas inteligentes: http://is.gd/NJIwRz
>
>
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