Unity: Kan ikke ssh til Unity-administrations-IP, men UI-login fungerer

Summary: Kunden kan ikke oprette forbindelse til Unity-administrations-IP, men kunden kan logge på brugergrænsefladen uden problemer. (Kan rettes af brugeren)

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
Check out other resources

Symptoms

Brugeren kan logge på Unity via brugergrænsefladen, men kan ikke oprette forbindelse via SSH. Fejlen viser, at der ikke blev fundet nogen matchende metode til nøgleudveksling.

C:\Users\administrator>ssh <Unity mgmt IP>
Unable to negotiate with <Unity mgmt IP> port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1

Unity kører kode 5.3, som allerede havde fjernet alle sha1-nøgleudvekslingsalgoritmer.

 

Cause

Kunden bruger en software kaldet DBSAFER som en ssh-proxy til at styre ssh-adgangen fra klienten til Unity. Klienten opretter en ssh-forbindelse med DBSAFER i stedet for Unity, når ssh til Unity-administrations-IP'en. DBSAFER kører en gammel openssh-version, der kun understøtter nogle gamle kex-udvekslingsalgoritmer, som ikke understøttes af klienten.

Outputtet "ssh -vvv <Unity mgmt IP>" viser, at serveren kører åben SSH version 3.0, og det angiver også DBSAFER version 2.30.205.

debug1: Local version string SSH-2.0-OpenSSH_for_Windows_9.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_3.0 DBSAFER_2.30.205
debug1: compat_banner: match: OpenSSH_3.0 DBSAFER_2.30.205 pat OpenSSH_2.*,OpenSSH_3.0*,OpenSSH_3.1* compat 0x01200002

Outputtet "ssh-vvv" indikerer også, at serveren kun understøttede følgende gamle kex-algoritmer.

KEX-algoritmer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1

debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,ext-info-c,kex-strict-c-v00@openssh.com   <<<<<< client supported key exchange algorithms
debug2: host key algorithms: ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,rsa-sha2-512,rsa-sha2-256
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1  <<<<< server supported key exchange algorithms
debug2: host key algorithms: ssh-rsa,ssh-dss
debug2: ciphers ctos: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: ciphers stoc: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael128-cbc,rijndael192-cbc,rijndael256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: MACs ctos: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zlib
debug2: compression stoc: none,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: (no match)
Unable to negotiate with 10.14.161.84 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1

 

Resolution

  • Deaktiver DBSAFER eller konfigurer DBSAFER til at tillade klient direkte ssh til Unity.
  • Opgrader DBSAFER for at få det til at understøtte mere sikre SSH-algoritmer.

 

Affected Products

Dell EMC Unity
Article Properties
Article Number: 000306077
Article Type: Solution
Last Modified: 22 Apr 2025
Version:  2
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.