Error message as below in logs while discovering linux server using rsp probe
kex error : no match for method kex algos: server [diffie-hellman-group-exchange-sha256], client [curve25519-sha256@libssh.org,ecdh-sha2-nistp256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1]
Release : 8.51
Component : UIM - RSP
Probe rsp 5.33
Destination Server: Redhat 7.3
From the error message target server is only supporting diffie-hellman-group-exchange-sha256 algorithm while client supporting different key algorithms
Add below to server so that they can negotiate the common algorithm
curve25519-sha256@libssh.org
ecdh-sha2-nistp256
ssh -Q cipher # List supported ciphers
ssh -Q mac # List supported MACs
ssh -Q key # List supported public key types
ssh -Q kex # List supported key exchange algorithms
https://www.ssh.com/ssh/sshd_config/