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RHEL 6 から RHEL 8 (fips) への SSH 接続が失敗し、"no hostkey alg" メッセージが表示される

Solution In Progress - Updated -


  • RHEL8 を FIPS モードで実行中に、RHEL6 から RHEL8 への SSH が失敗します。
  • SSH デバッグ出力を以下に示します。
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
  • FIPS モードでの RHEL8 の SSH 相互運用性。


  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • openssh

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