% Gestion des algorithmes de chiffrement


### Erreurs de compatibilité d'algorithmes d'échange

- "Unable to negotiate with 1.2.3.4 port 22: no matching key exchange method found. Their offer: diffie-hellman-group14-sha1"
- "Unable to negotiate" "no matching host key type found. Their offer: ssh-rsa"


```

Host switch-hp
    Hostname 10.29.10.10
    Ciphers 3des-cbc
    KexAlgorithms +diffie-hellman-group14-sha1
    HostKeyAlgorithms=+ssh-rsa
    User user
```
 
- [SSH returns: no matching host key type found. Their offer: ssh-dss - Ask Ubuntu](https://askubuntu.com/questions/836048/ssh-returns-no-matching-host-key-type-found-their-offer-ssh-dss)
- [ssh unable to negotiate - no matching key exchange method found - Unix & Linux Stack Exchange](https://unix.stackexchange.com/questions/402746/ssh-unable-to-negotiate-no-matching-key-exchange-method-found)
- [LINUX - SSH - no matching key exchange method found - Admin Malin](https://www.adminmalin.fr/linux-ssh-no-matching-key-exchange-method-found/)
- [Troubleshooting SSH “No Matching Key Exchange/Host Key Method/Type Found” errors | Incredigeek](https://www.incredigeek.com/home/troubleshooting-ssh-no-matching-key-exchange-host-key-method-type-found-errors/)