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WindowsServerOSでSSL/TLSにおける脆弱な暗号化方式・ハッシュアルゴリズムでRC4を無効化する

Last updated at Posted at 2024-12-16

はじめに

  • こちらの記事で紹介したように、WindowsServerOSでもやんややんやセキュリティについて言われるので、対応したメモを残します。今回はRC4を無効化します。

推奨されないRC4のS無効化(サーバサイド)

  • 対象OS:WindowsServer2016/2019(2022もいけるはずですが、自己責任でお願いします)

  • 以下レジストリ―キーを作成する

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\Schannel\Ciphers\RC4 128/128
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\Schannel\Ciphers\RC4 40/128
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\Schannel\Ciphers\RC4 56/128
  • それぞれのキーで"Enabled"の"dword"の値を"00000000"に設定する。

参考

  • 基本はやっぱりMicrosoftの公式ドキュメント!

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