我有 2 台相同的 Ubuntu 20.04 LTS 服务器（实际上其中一台是 VMWare 中另一台的克隆），当我尝试从一台服务器执行 SFTP 或 SSH 到另一台服务器时，我得到了
未找到匹配的密钥交换方法。
他们的提议：diffie-hellman-group-exchange-sha1、diffie-hellman-group14-sha1、diffie-hellman-group1-sha1，[电子邮件保护]
无论我尝试以哪种方式连接，都会出现此问题。
如能提供任何帮助，我将不胜感激。
更新 3
ewessel@unifyed-new-db:~$ sudo sshd -T | grep ciphers | perl -pe 's/,/\n/g' | sort -u
aes128-ctr
[email protected]
aes192-ctr
aes256-ctr
[email protected]
ciphers [email protected]
更新2
在/etc/ssh/sshd_config.d/两台机器的目录中，我发现了一个名为的文件weak.conf，其中包含以下内容：
KexAlgorithms diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
更新 1
下面是 ssh 连接期间发生的情况的详细列表：
ewessel@unifyed-new-db:~$ ssh -vvv [email protected]
OpenSSH_8.2p1 Ubuntu-4ubuntu0.11, OpenSSL 1.1.1f 31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug2: resolve_canonicalize: hostname 10.50.1.210 is address
debug2: ssh_connect_direct
debug1: Connecting to xx.xx.xx.xx [xx.xx.xx.xx] port 22.
debug1: Connection established.
debug1: identity file /home/ewessel/.ssh/id_rsa type -1
debug1: identity file /home/ewessel/.ssh/id_rsa-cert type -1
debug1: identity file /home/ewessel/.ssh/id_dsa type -1
debug1: identity file /home/ewessel/.ssh/id_dsa-cert type -1
debug1: identity file /home/ewessel/.ssh/id_ecdsa type -1
debug1: identity file /home/ewessel/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/ewessel/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/ewessel/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/ewessel/.ssh/id_ed25519 type -1
debug1: identity file /home/ewessel/.ssh/id_ed25519-cert type -1
debug1: identity file /home/ewessel/.ssh/id_ed25519_sk type -1
debug1: identity file /home/ewessel/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/ewessel/.ssh/id_xmss type -1
debug1: identity file /home/ewessel/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.11
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.11
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.11 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 10.50.1.210:22 as 'ewessel'
debug3: hostkeys_foreach: reading file "/home/ewessel/.ssh/known_hosts"
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],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,[email protected]
debug2: host key algorithms: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],ssh-ed25519,[email protected],rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],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,[email protected]
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug3: will use strict KEX ordering
debug1: kex: algorithm: (no match)
Unable to negotiate with xx.xx.xx.xx port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1,[email protected]