Hi,
I am experiencing a strange behavior. My Veeam B&R is running on a local Server. On a remote site, connected via VPN, I am backing up a Ubuntu Server with installed Veeam Agent. On B&R I inserted correct Privkey and credentials. This has just worked fine till yesterday. At about the same time I was not able to ssh into that remote server anymore. After debugging that issue I discovered, that the solution was to at this
to .ssh/config on my linux client on local site.KexAlgorithms diffie-hellman-group18-sha512
This is very strange, because that was not needed before and I don't see any changes either to client ssh config nor on server side.
My server config is like this:
Code: Select all
KexAlgorithms sntrup761x25519-sha512@openssh.com,curve25519-sha256,curve25519-sha256@libssh.org,gss-curve25519-sha256-,diffie-hellman-group16-sha512,gss-group16-sha512-,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha256
Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-128-etm@openssh.com
HostKeyAlgorithms ssh-ed25519,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256,rsa-sha2-256-cert-v01@openssh.com
It looks to me that my server is fulfilling the requirement for Pubkey ssh .
I have no clue what is causing B&R to not connect to my Ubuntu server anymore.