Environment Information

Provide at least:

• JRuby version 9.3.4.0
• Operating system and platform : Linux Gentoo 4.0.2 x86_64 AMD EPYC 7551P 32-Core

Other relevant info you may wish to add:

• NET-SSH 7.0.1
• NET-SFTP 3.0.0

Expected Behavior

• Net::SSH.start should be able connect to an OpenSSH_8 server with FIPS enabled without block in "exchanging keys" phase. Server close the connection for timeout.

Actual Behavior

• 09/09/22 07:17:36 INFO - RemoteFileManager.rb:138:in addFile' -- Upload file xxxx.xxx ... 09/09/22 07:17:36 INFO - RemoteFileManager.rb:183:in upload' -- connect to x.x.x.x with SFTP
  D, [2022-09-09T07:17:36.659460 #18302] DEBUG -- net.ssh.transport.session[fa8]: establishing connection to x.x.x.x:22
  D, [2022-09-09T07:17:36.718615 #18302] DEBUG -- net.ssh.transport.session[fa8]: connection established
  I, [2022-09-09T07:17:36.720074 #18302] INFO -- net.ssh.transport.server_version[fac]: negotiating protocol version
  D, [2022-09-09T07:17:36.720363 #18302] DEBUG -- net.ssh.transport.server_version[fac]: local is SSH-2.0-Ruby/Net::SSH_7.0.1 java' D, [2022-09-09T07:17:36.791595 #18302] DEBUG -- net.ssh.transport.server_version[fac]: remote is SSH-2.0-OpenSSH_8.0'
  W, [2022-09-09T07:17:36.795580 #18302] WARN -- net.ssh.transport.algorithms[fb0]: unsupported algorithm: ["ecdsa-sha2-nistp521-cert-v01@openssh.com", "ecdsa-sha2-nistp384-cert-v01@openssh.com", "ecdsa-sha2-nistp256-cert-v01@openssh.com", "ecdsa-sha2-nistp521", "ecdsa-sha2-nistp384", "ecdsa-sha2-nistp256"]' W, [2022-09-09T07:17:36.796216 #18302] WARN -- net.ssh.transport.algorithms[fb0]: unsupported algorithm: ["ecdh-sha2-nistp521", "ecdh-sha2-nistp384", "ecdh-sha2-nistp256"]'
  I, [2022-09-09T07:17:36.818335 #18302] INFO -- net.ssh.transport.algorithms[fb0]: sending KEXINIT
  D, [2022-09-09T07:17:36.822976 #18302] DEBUG -- socket[fb4]: queueing packet nr 0 type 20 len 564
  D, [2022-09-09T07:17:36.824360 #18302] DEBUG -- socket[fb4]: sent 568 bytes
  D, [2022-09-09T07:17:36.828416 #18302] DEBUG -- socket[fb4]: read 768 bytes
  D, [2022-09-09T07:17:36.829613 #18302] DEBUG -- socket[fb4]: received packet nr 0 type 20 len 764
  I, [2022-09-09T07:17:36.830798 #18302] INFO -- net.ssh.transport.algorithms[fb0]: got KEXINIT from server
  I, [2022-09-09T07:17:36.831990 #18302] INFO -- net.ssh.transport.algorithms[fb0]: negotiating algorithms
  D, [2022-09-09T07:17:36.833459 #18302] DEBUG -- net.ssh.transport.algorithms[fb0]: negotiated:
• kex: diffie-hellman-group-exchange-sha256
• host_key: rsa-sha2-256
• encryption_server: aes256-ctr
• encryption_client: aes256-ctr
• hmac_client: hmac-sha2-512-etm@openssh.com
• hmac_server: hmac-sha2-512-etm@openssh.com
• compression_client: none
• compression_server: none
• language_client:
• language_server:
  D, [2022-09-09T07:17:36.835608 #18302] DEBUG -- net.ssh.transport.algorithms[fb0]: exchanging keys
  D, [2022-09-09T07:17:36.865933 #18302] DEBUG -- socket[fb4]: queueing packet nr 1 type 34 len 20
  D, [2022-09-09T07:17:36.866569 #18302] DEBUG -- socket[fb4]: sent 24 bytes
  D, [2022-09-09T07:17:36.914643 #18302] DEBUG -- socket[fb4]: read 1048 bytes
  D, [2022-09-09T07:17:36.915552 #18302] DEBUG -- socket[fb4]: received packet nr 1 type 31 len 1044
  log writing failed. execution expired
  D, [2022-09-09T07:22:33.614947 #18302] DEBUG -- socket[fb4]: sent 1040 bytes
  D, [2022-09-09T07:22:33.615616 #18302] DEBUG -- socket[fb4]: read 0 bytes
  09/09/22 07:22:33 ERROR - RemoteFileManager.rb:147:in `addFile' -- #<Net::SSH::Disconnect: connection closed by remote host>

using MRI 2.6 and the same version of net-ssh I am able to connect to the same server without error.