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Debian Alain

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[résolu] connexions ssh impossibles

bonsoir . 

j'ai un souci avec ssh .

je pense  que j'ai dû planter le client . 

je n'ai plus aucune connexion en ssh sur mes vm .

ssh buster@192.168.1.2

Received disconnect from 192.168.1.2 port 22:2: Too many authentication failures
Disconnected from 192.168.1.2 port 22

ssh vmstretch

Received disconnect from 192.168.1.32 port 22:2: Too many authentication failures
Disconnected from 192.168.1.32 port 22

ssh root@192.168.1.2 -o PubkeyAuthentication=no

root@192.168.1.2's password:
Permission denied, please try again.
root@192.168.1.2's password:
Permission denied, please try again.
root@192.168.1.2's password:
root@192.168.1.2: Permission denied (publickey,password).

il n'y a que cette commande  qui semble fonctionner :

ssh buster@192.168.1.2 -o PubkeyAuthentication=no

buster@192.168.1.2's password:
Linux Host-002 4.19.0-4-amd64 #1 SMP Debian 4.19.28-2 (2019-03-15) x86_64

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: Sat Mar 30 20:59:56 2019 from 192.168.1.68
buster@Host-002:~$

http://geekeries.de-labrusse.fr/?p=2645

avec un

MaxAuthTries 24 (6 à l'origine)

çà ne fonctionne toujours pas .

j'ai cherché  sur le web mais je n'ai rien compris aux solutions proposées . 

le site de D-F ne m'a pas beaucoup plus aidé .

j'ai réinstallé le client et le serveur : pas de résultat .

si vous pouvez m'expliquer la panne et me donner la soluce ...

merci d'avance . 

Dernière modification par Debian Alain (31-03-2019 10:37:17)

---

+ -- Les Cahiers du Débutant (Bullseye) -- + -- Les Cahiers de l'Admin (buster) -- +

+ (ISOs Debian Facile) + -- Les Commandes Linux (D - F) -- +

bendia

Chadministrateur

Distrib. : openSUSE Tumbleweed, Buster

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Re : [résolu] connexions ssh impossibles

Salut
Avec une entrée dans ~/.ssh/config de ce genre ?

Host un_petit_nom_pour_se__rappeller
Hostname IP_ ou_nom_d_hôte
User le_user_qui_va_bien
IdentitiesOnly=yes
 

---

Ben
___________________
La seule question bête, c'est celle qu'on ne pose pas.

Debian Alain

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Re : [résolu] connexions ssh impossibles

modif' faite , je teste ...

Host vmbuster
Hostname 192.168.1.2
User buster
IdentitiesOnly=yes
Port 22

Dernière modification par Debian Alain (30-03-2019 21:14:55)

---

+ -- Les Cahiers du Débutant (Bullseye) -- + -- Les Cahiers de l'Admin (buster) -- +

+ (ISOs Debian Facile) + -- Les Commandes Linux (D - F) -- +

David5647

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Re : [résolu] connexions ssh impossibles

Ca serait pas un trop grand nombre de clés dans .ssh/key_xxx
D'après ce que j'ai compris, ssh teste toutes les clés dans .ssh
et donc si il en teste un nombre supérieure à la limite fixée dans ton fichier de conf, ça bloque

pour voir si c'est ça :
que renvoient les mêmes commandes avec plus de "verbose" (-v)

Debian Alain

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Re : [résolu] connexions ssh impossibles

oui , David5647 , tu as raison . il y a trop de clés .

je te réponds mais saches  que bendia m'a donné la bonne commande .

ssh -v vmbuster

OpenSSH_7.9p1 Debian-9, OpenSSL 1.1.1b  26 Feb 2019
debug1: Reading configuration data /home/alain/.ssh/config
debug1: /home/alain/.ssh/config line 36: Applying options for vmbuster
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.1.2 [192.168.1.2] port 22.
debug1: Connection established.
debug1: identity file /home/alain/.ssh/id_rsa type 0
debug1: identity file /home/alain/.ssh/id_rsa-cert type -1
debug1: identity file /home/alain/.ssh/id_dsa type -1
debug1: identity file /home/alain/.ssh/id_dsa-cert type -1
debug1: identity file /home/alain/.ssh/id_ecdsa type -1
debug1: identity file /home/alain/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/alain/.ssh/id_ed25519 type -1
debug1: identity file /home/alain/.ssh/id_ed25519-cert type -1
debug1: identity file /home/alain/.ssh/id_xmss type -1
debug1: identity file /home/alain/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9p1 Debian-9
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.9p1 Debian-9
debug1: match: OpenSSH_7.9p1 Debian-9 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 192.168.1.2:22 as 'buster'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:FzlfO7Gn923I0i8WtVlX2rUHmYkEOhLzgAUHY/e5KZY
debug1: Host '192.168.1.2' is known and matches the ECDSA host key.
debug1: Found key in /home/alain/.ssh/known_hosts:12
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /home/alain/.ssh/id_rsa RSA SHA256:W8G8opHhRVembD3ViL9Ae8jk+UVomKM3jp3Fe/iGLVQ agent
debug1: Will attempt key: /home/alain/.ssh/id_dsa
debug1: Will attempt key: /home/alain/.ssh/id_ecdsa
debug1: Will attempt key: /home/alain/.ssh/id_ed25519
debug1: Will attempt key: /home/alain/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/alain/.ssh/id_rsa RSA SHA256:W8G8opHhRVembD3ViL9Ae8jk+UVomKM3jp3Fe/iGLVQ agent
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/alain/.ssh/id_dsa
debug1: Trying private key: /home/alain/.ssh/id_ecdsa
debug1: Trying private key: /home/alain/.ssh/id_ed25519
debug1: Trying private key: /home/alain/.ssh/id_xmss
debug1: Next authentication method: password
buster@192.168.1.2's password:
debug1: Authentication succeeded (password).
Authenticated to 192.168.1.2 ([192.168.1.2]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug1: Sending environment.
debug1: Sending env LANG = fr_FR.UTF-8
Linux Host-002 4.19.0-4-amd64 #1 SMP Debian 4.19.28-2 (2019-03-15) x86_64

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: Sat Mar 30 21:15:14 2019 from 192.168.1.68
buster@Host-002:~$

je comprends rien à tous ce fatras .

on dirait qu'il cherche une quantité faramineuse de clés ...

Dernière modification par Debian Alain (30-03-2019 21:22:19)

---

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David5647

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Re : [résolu] connexions ssh impossibles

Oui, j'avais pas saisi la réponse de bendia,
D'après ce que je comprends, elle pallie justement à ce trop grand nombre de clé
IdentitiesOnly=yes désactive la recherche des clés dans .ssh/
du coup tu dois rajouter -i key_xxx ?

Je suis dans le vrai?

Debian Alain

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Re : [résolu] connexions ssh impossibles

par contre , j'ai parlé trop vite .

pour buster , çà a  marché mais pas pour la vm stretch

alain@Alain-PC:~$ ssh root@192.168.1.32

Received disconnect from 192.168.1.32 port 22:2: Too many authentication failures
Disconnected from 192.168.1.32 port 22
 

alain@Alain-PC:~$ ssh root@192.168.1.32 -o PubkeyAuthentication=no

root@192.168.1.32's password:
Permission denied, please try again.
root@192.168.1.32's password:
Permission denied, please try again.
root@192.168.1.32's password:
root@192.168.1.32: Permission denied (publickey,password).
 

alain@Alain-PC:~$ ssh debian@192.168.1.32

Received disconnect from 192.168.1.32 port 22:2: Too many authentication failures
Disconnected from 192.168.1.32 port 22
 

alain@Alain-PC:~$ ssh debian@192.168.1.32 -o PubkeyAuthentication=no

debian@192.168.1.32's password:
Permission denied, please try again.
debian@192.168.1.32's password:
Permission denied, please try again.
debian@192.168.1.32's password:
debian@192.168.1.32: Permission denied (publickey,password).
 

alain@Alain-PC:~$ ssh -v debian@192.168.1.32

OpenSSH_7.9p1 Debian-9, OpenSSL 1.1.1b  26 Feb 2019
debug1: Reading configuration data /home/alain/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.1.32 [192.168.1.32] port 22.
debug1: Connection established.
debug1: identity file /home/alain/.ssh/id_rsa type 0
debug1: identity file /home/alain/.ssh/id_rsa-cert type -1
debug1: identity file /home/alain/.ssh/id_dsa type -1
debug1: identity file /home/alain/.ssh/id_dsa-cert type -1
debug1: identity file /home/alain/.ssh/id_ecdsa type -1
debug1: identity file /home/alain/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/alain/.ssh/id_ed25519 type -1
debug1: identity file /home/alain/.ssh/id_ed25519-cert type -1
debug1: identity file /home/alain/.ssh/id_xmss type -1
debug1: identity file /home/alain/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9p1 Debian-9
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4p1 Debian-10+deb9u6
debug1: match: OpenSSH_7.4p1 Debian-10+deb9u6 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to 192.168.1.32:22 as 'debian'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:FTftIJmQmRSwnrDeEKjKmHxZj4EUfuGbz/8/ACYJS4I
debug1: Host '192.168.1.32' is known and matches the ECDSA host key.
debug1: Found key in /home/alain/.ssh/known_hosts:9
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /home/alain/.ssh/id_rsa RSA SHA256:W8G8opHhRVembD3ViL9Ae8jk+UVomKM3jp3Fe/iGLVQ agent
debug1: Will attempt key: alain@Alain-PC RSA SHA256:kAUPeDeqoxODKUMdD8tevk/Q1Gw4OtNKl35WRgq0DMQ agent
debug1: Will attempt key: alain@Alain-PC RSA SHA256:aX98Re2WXO/dplFw3k4OiS6g+x/S3JeAEGfCrf8uZNI agent
debug1: Will attempt key: alain@Alain-PC RSA SHA256:no8Ia66guvmytlxtvJLjqpTmCuNvxfcSJJI3srH+MFQ agent
debug1: Will attempt key: alain@Alain-PC RSA SHA256:cIje7Ou7KLJUW1vzsKtU6zpl1zBX/Li/CMjCD+H6Rb8 agent
debug1: Will attempt key: alain@Alain-PC RSA SHA256:HHsNU7myXeHfTPT/2+25xZNhsmAo45e9MKNon/bm+MI agent
debug1: Will attempt key: /home/alain/.ssh/id_dsa
debug1: Will attempt key: /home/alain/.ssh/id_ecdsa
debug1: Will attempt key: /home/alain/.ssh/id_ed25519
debug1: Will attempt key: /home/alain/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/alain/.ssh/id_rsa RSA SHA256:W8G8opHhRVembD3ViL9Ae8jk+UVomKM3jp3Fe/iGLVQ agent
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: alain@Alain-PC RSA SHA256:kAUPeDeqoxODKUMdD8tevk/Q1Gw4OtNKl35WRgq0DMQ agent
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: alain@Alain-PC RSA SHA256:aX98Re2WXO/dplFw3k4OiS6g+x/S3JeAEGfCrf8uZNI agent
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: alain@Alain-PC RSA SHA256:no8Ia66guvmytlxtvJLjqpTmCuNvxfcSJJI3srH+MFQ agent
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: alain@Alain-PC RSA SHA256:cIje7Ou7KLJUW1vzsKtU6zpl1zBX/Li/CMjCD+H6Rb8 agent
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: alain@Alain-PC RSA SHA256:HHsNU7myXeHfTPT/2+25xZNhsmAo45e9MKNon/bm+MI agent
Received disconnect from 192.168.1.32 port 22:2: Too many authentication failures
Disconnected from 192.168.1.32 port 22
 

https://superuser.com/questions/187779/ … r-username

https://www.tecmint.com/fix-ssh-too-man … res-error/

https://www.debian-fr.org/t/ssh-too-man … ures/32641

https://serverfault.com/questions/36291 … -user-root

https://www.linuxquestions.org/question … 175601824/

rien compris

Dernière modification par Debian Alain (31-03-2019 09:15:32)

---

+ -- Les Cahiers du Débutant (Bullseye) -- + -- Les Cahiers de l'Admin (buster) -- +

+ (ISOs Debian Facile) + -- Les Commandes Linux (D - F) -- +

Debian Alain

Membre

Lieu : Bretagne

Distrib. : sid (unstable) / bullseye (stable)

Noyau : Linux sid 6.4.0-3-amd64

(G)UI : Gnome X.org (X11) / GDM3

Inscription : 11-03-2017

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Re : [résolu] connexions ssh impossibles

pourtant , j'ai pas gaffé , si ???

Host vmstretch
Hostname 192.168.1.32
User debian
IdentitiesOnly=yes
Port 22

Host vmbuster
Hostname 192.168.1.2
User buster
IdentitiesOnly=yes
Port 22

je reteste aujourd'hui

quoique je fasse , ssh refuse de me donner la  connexion :

alain@Alain-PC:~$ ssh -v -p 22 vmstretch
OpenSSH_7.9p1 Debian-9, OpenSSL 1.1.1b  26 Feb 2019
debug1: Reading configuration data /home/alain/.ssh/config
debug1: /home/alain/.ssh/config line 30: Applying options for vmstretch
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.1.32 [192.168.1.32] port 22.
debug1: Connection established.
debug1: identity file /home/alain/.ssh/id_rsa type 0
debug1: identity file /home/alain/.ssh/id_rsa-cert type -1
debug1: identity file /home/alain/.ssh/id_dsa type -1
debug1: identity file /home/alain/.ssh/id_dsa-cert type -1
debug1: identity file /home/alain/.ssh/id_ecdsa type -1
debug1: identity file /home/alain/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/alain/.ssh/id_ed25519 type -1
debug1: identity file /home/alain/.ssh/id_ed25519-cert type -1
debug1: identity file /home/alain/.ssh/id_xmss type -1
debug1: identity file /home/alain/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9p1 Debian-9
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4p1 Debian-10+deb9u6
debug1: match: OpenSSH_7.4p1 Debian-10+deb9u6 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug1: Authenticating to 192.168.1.32:22 as 'debian'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:FTftIJmQmRSwnrDeEKjKmHxZj4EUfuGbz/8/ACYJS4I
debug1: Host '192.168.1.32' is known and matches the ECDSA host key.
debug1: Found key in /home/alain/.ssh/known_hosts:9
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /home/alain/.ssh/id_rsa RSA SHA256:W8G8opHhRVembD3ViL9Ae8jk+UVomKM3jp3Fe/iGLVQ agent
debug1: Will attempt key: /home/alain/.ssh/id_dsa
debug1: Will attempt key: /home/alain/.ssh/id_ecdsa
debug1: Will attempt key: /home/alain/.ssh/id_ed25519
debug1: Will attempt key: /home/alain/.ssh/id_xmss
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/alain/.ssh/id_rsa RSA SHA256:W8G8opHhRVembD3ViL9Ae8jk+UVomKM3jp3Fe/iGLVQ agent
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/alain/.ssh/id_dsa
debug1: Trying private key: /home/alain/.ssh/id_ecdsa
debug1: Trying private key: /home/alain/.ssh/id_ed25519
debug1: Trying private key: /home/alain/.ssh/id_xmss
debug1: Next authentication method: password
debian@192.168.1.32's password:
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
debian@192.168.1.32's password:
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
debian@192.168.1.32's password:
debug1: Authentications that can continue: publickey,password
debug1: No more authentication methods to try.
debian@192.168.1.32: Permission denied (publickey,password).


alain@Alain-PC:~$ ssh -o PubkeyAuthentication=no root@192.168.1.32
root@192.168.1.32's password:
Permission denied, please try again.
root@192.168.1.32's password:
Permission denied, please try again.
root@192.168.1.32's password:
root@192.168.1.32: Permission denied (publickey,password).


alain@Alain-PC:~$ ssh -o PubkeyAuthentication=no debian@192.168.1.32
debian@192.168.1.32's password:
Permission denied, please try again.
debian@192.168.1.32's password:
Permission denied, please try again.
debian@192.168.1.32's password:

solution trouvée :

reinitialisation du ~/.ssh/known_hosts (R.A.Z.,effacement , quoi)
correction paramétrage de ~/.ssh/config .
il y  avait une  erreur dans le user distant du ssh de ma vm .

Dernière modification par Debian Alain (31-03-2019 10:36:25)

---

+ -- Les Cahiers du Débutant (Bullseye) -- + -- Les Cahiers de l'Admin (buster) -- +

+ (ISOs Debian Facile) + -- Les Commandes Linux (D - F) -- +