我遇到一个问题，旧客户端无法连接到当前（v8.x）版本的 openssh 服务器。我熟悉将 ssh-rsa、ssh-dss 添加到可用密钥类型列表中，但这似乎不适用于此问题。
我们的供应商之一是客户，没有传递标志的选项。当他们尝试连接时，我得到以下信息：
Apr 16 20:57:13 server sshd[70429]: Unable to negotiate with 10.0.3.39 port 49100: no matching host key type found. Their offer: [email protected],[email protected],[email protected],[email protected],ssh-rsa,ssh-dss [preauth]
我已将以下内容添加到 /etc/ssh/sshd_config.d/10-test.conf
KexAlgorithms=+diffie-hellman-group1-sha1
[email protected],[email protected],ssh-rsa,ssh-dss
PubkeyAcceptedAlgorithms=+ssh-rsa,ssh-dss
以及没有“=”但没有任何效果。这是调试输出：
[centos@ip-10-0-3-39 ~]$ ssh -vv -i test [email protected]
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 10.0.3.225 [10.0.3.225] port 22.
debug1: Connection established.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug2: key_type_from_name: unknown key type '-----END'
debug1: identity file test type -1
debug1: identity file test-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.7
debug1: match: OpenSSH_8.7 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,[email protected]
debug2: kex_parse_kexinit: hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96
debug2: kex_parse_kexinit: hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,[email protected]
debug2: kex_parse_kexinit: ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: [email protected],[email protected],aes256-ctr,[email protected],aes128-ctr
debug2: kex_parse_kexinit: [email protected],[email protected],aes256-ctr,[email protected],aes128-ctr
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,[email protected],hmac-sha2-512
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha1,[email protected],hmac-sha2-512
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-sha1
debug1: kex: server->client aes128-ctr hmac-sha1 none
debug2: mac_setup: found hmac-sha1
debug1: kex: client->server aes128-ctr hmac-sha1 none
no hostkey alg
有人有任何想法吗，因为我不知所措。
谢谢！