Error packet with ssh connection

[vinhsts]

Expected behavior

Should connect to server successfully

Actual behavior

Failed to connect server, but it can be connected by using normal cms: ssh user@host

System configuration

• net-ssh version (6.1.0 or 7.0.1)
• Ruby version (2.7.0)

Debug

D, [2022-11-25T17:49:46.387186 #89115] DEBUG -- net.ssh.transport.session[21c]: establishing connection to gate.appengine.flow.ch:3022
D, [2022-11-25T17:49:47.262470 #89115] DEBUG -- net.ssh.transport.session[21c]: connection established
I, [2022-11-25T17:49:47.262596 #89115] INFO -- net.ssh.transport.server_version[230]: negotiating protocol version
D, [2022-11-25T17:49:47.262632 #89115] DEBUG -- net.ssh.transport.server_version[230]: local is SSH-2.0-Ruby/Net::SSH_7.0.1 x86_64-darwin21' D, [2022-11-25T17:49:47.671359 #89115] DEBUG -- net.ssh.transport.server_version[230]: remote is SSH-2.0-JSSHProxy'
I, [2022-11-25T17:49:47.671512 #89115] INFO -- net.ssh.transport.algorithms[244]: sending KEXINIT
D, [2022-11-25T17:49:47.671731 #89115] DEBUG -- socket[258]: queueing packet nr 0 type 20 len 500
D, [2022-11-25T17:49:47.671810 #89115] DEBUG -- socket[258]: sent 504 bytes
D, [2022-11-25T17:49:47.671889 #89115] DEBUG -- socket[258]: read 576 bytes
D, [2022-11-25T17:49:47.671964 #89115] DEBUG -- socket[258]: received packet nr 0 type 20 len 572
I, [2022-11-25T17:49:47.671999 #89115] INFO -- net.ssh.transport.algorithms[244]: got KEXINIT from server
I, [2022-11-25T17:49:47.672058 #89115] INFO -- net.ssh.transport.algorithms[244]: negotiating algorithms
D, [2022-11-25T17:49:47.672159 #89115] DEBUG -- net.ssh.transport.algorithms[244]: negotiated:

• kex: curve25519-sha256
• host_key: ssh-rsa
• encryption_server: aes128-ctr
• encryption_client: aes128-ctr
• hmac_client: hmac-sha2-256-etm@openssh.com
• hmac_server: hmac-sha2-256-etm@openssh.com
• compression_client: none
• compression_server: none
• language_client:
• language_server:
  D, [2022-11-25T17:49:47.672180 #89115] DEBUG -- net.ssh.transport.algorithms[244]: exchanging keys
  D, [2022-11-25T17:49:47.672894 #89115] DEBUG -- socket[258]: queueing packet nr 1 type 30 len 44
  D, [2022-11-25T17:49:47.672943 #89115] DEBUG -- socket[258]: sent 48 bytes
  D, [2022-11-25T17:49:48.291160 #89115] DEBUG -- socket[258]: read 624 bytes
  D, [2022-11-25T17:49:48.291333 #89115] DEBUG -- socket[258]: received packet nr 1 type 31 len 604
  D, [2022-11-25T17:49:48.292940 #89115] DEBUG -- socket[258]: queueing packet nr 2 type 21 len 20
  D, [2022-11-25T17:49:48.293076 #89115] DEBUG -- socket[258]: sent 24 bytes
  D, [2022-11-25T17:49:48.293134 #89115] DEBUG -- socket[258]: received packet nr 2 type 21 len 12
  D, [2022-11-25T17:49:48.293360 #89115] DEBUG -- net.ssh.authentication.session[26c]: beginning authentication of 124842-4721' D, [2022-11-25T17:49:48.293453 #89115] DEBUG -- socket[258]: using encrypt-then-mac D, [2022-11-25T17:49:48.293519 #89115] DEBUG -- socket[258]: queueing packet nr 3 type 5 len 32 D, [2022-11-25T17:49:48.293557 #89115] DEBUG -- socket[258]: sent 68 bytes D, [2022-11-25T17:49:48.885089 #89115] DEBUG -- socket[258]: read 312 bytes D, [2022-11-25T17:49:48.885472 #89115] DEBUG -- socket[258]: received packet nr 3 type 7 len 208 /.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/net-ssh-7.0.1/lib/net/ssh/authentication/session.rb:122:in block in next_message': unexpected message 7 (\a\0\0\0\x01\0\0\0\x0Fserver-sig-algs\0\0\0?rsa-sha2-256,rsa-sha2-512,ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,sk-ecdsa-sha2-nistp256@openssh.com,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,sk-ssh-ed25519@openssh.com) (Net::SSH::Exception)

Can you please help to understand why?