Red Hat Summit Red Hat Summitサポートコンソール開発者トライアルの開始お問い合わせ

Chapter 7. Disabling Weak Encryption

You might want to change the encryption settings for Satellite depending on the security requirements of your infrastructure or to fix vulnerabilities quickly. Use the following sections to disable weak SSL encryption and 64-bit cipher suites.

7.1. Disabling Weak SSL 2.0 and SSL 3.0 Encryption
リンクのコピー

If your Satellite fails Nessus scans because of SSL vulnerabilities, or your security infrastructure requires that you disable SSL 2.0 and SSL 3.0, you can edit the /etc/foreman-installer/custom-hiera.yaml file to remove weak encryption.

Disabling Weak SSL 2.0 and SSL 3.0 Encryption for Satellite

To disable weak encryption for Satellite, complete the following steps:

  1. Open the /etc/foreman-installer/custom-hiera.yaml file for editing: 

    # vi /etc/foreman-installer/custom-hiera.yaml
    Copy to Clipboard Toggle word wrap

  2. Add the following entries: 

    # Foreman Proxy
foreman_proxy::tls_disabled_versions: [ '1.1' ]

# Dynflow
foreman_proxy::plugin::dynflow::tls_disabled_versions: [ '1.1' ]

# Apache
apache::mod::ssl::ssl_protocol: [ 'ALL' , '-SSLv3' , '-TLSv1' , '-TLSv1.1' , '+TLSv1.2' ]

# Tomcat / Candlepin
candlepin::tls_versions: [ '1.2' ]

# QPID Dispatch
foreman_proxy_content::qpid_router_ssl_protocols: [ 'TLSv1.2' ]
foreman_proxy_content::qpid_router_ssl_ciphers: 'ALL:!aNULL:+HIGH:-SSLv3:!IDEA-CBC-SHA'
    Copy to Clipboard Toggle word wrap

  3. Rerun the satellite-installer tool with no arguments: 

    # satellite-installer --scenario satellite
    Copy to Clipboard Toggle word wrap

  4. Restart Katello services: 

    # katello-service restart
    Copy to Clipboard Toggle word wrap

Disabling Weak SSL 2.0 and SSL 3.0 Encryption for Capsule

To disable weak encryption for Capsule, complete the following steps:

  1. Open the /etc/foreman-installer/custom-hiera.yaml file for editing: 

    # vi /etc/foreman-installer/custom-hiera.yaml
    Copy to Clipboard Toggle word wrap

  2. Add the following entries: 

    # Foreman Proxy
foreman_proxy::tls_disabled_versions: [ '1.1' ]

# Dynflow
foreman_proxy::plugin::dynflow::tls_disabled_versions: [ '1.1' ]

# Apache
apache::mod::ssl::ssl_protocol: [ 'ALL' , '-SSLv3' , '-TLSv1' , '-TLSv1.1' , '+TLSv1.2' ]

# QPID Dispatch
foreman_proxy_content::qpid_router_ssl_protocols: [ 'TLSv1.2' ]
foreman_proxy_content::qpid_router_ssl_ciphers: 'ALL:!aNULL:+HIGH:-SSLv3:!IDEA-CBC-SHA'

# PULP
pulp::ssl_protocol: "ALL -SSLv3 -TLSv1 -TLSv1.1 +TLSv1.2"
    Copy to Clipboard Toggle word wrap

  3. Rerun the satellite-installer tool with no arguments: 

    # satellite-installer --scenario capsule
    Copy to Clipboard Toggle word wrap

  4. Restart Katello services: 

    # katello-service restart
    Copy to Clipboard Toggle word wrap

7.2. Disabling 64-bit Block Size Cipher Suites (SWEET32)
リンクのコピー

If you want to update your cipher suites for Satellite, you can edit the ciphers and then add your changes to the /etc/foreman-installer/custom-hiera.yaml file to make these changes persistent.

You can use the following procedure to update your cipher suite.

Until BZ#1586271 is resolved, you might want to disable SSL 64-bit Block Size Cipher Suites (SWEET32). However, you can also use this procedure to update other ciphers and make these changes persistent.

The minimum browser requirements for the following Ciphers is Firefox 27.

  1. Open the /etc/httpd/conf.d/ssl.conf Apache configuration file for editing: 

    # vi /etc/httpd/conf.d/ssl.conf
    Copy to Clipboard Toggle word wrap

  2. Update the values of SSLCipherSuite parameter: 

    SSLCipherSuite ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256
    Copy to Clipboard Toggle word wrap

  3. Restart the httpd service: 

    # systemctl restart httpd
    Copy to Clipboard Toggle word wrap

  4. To make the change persistent across different satellite-installer executions, open the /etc/foreman-installer/custom-hiera.yaml file for editing: 

    # vi /etc/foreman-installer/custom-hiera.yaml
    Copy to Clipboard Toggle word wrap

  5. Add the following entry for apache: 

    apache::mod::ssl::ssl_cipher: ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256
    Copy to Clipboard Toggle word wrap

  6. Run the satellite-installer tool to add the changes to the Apache configuration: 

    # satellite-installer -S satellite
    Copy to Clipboard Toggle word wrap
トップに戻る
Red Hat logoGithubredditYoutubeTwitter

詳細情報

試用、購入および販売

コミュニティー

Red Hat ドキュメントについて

Red Hat をお使いのお客様が、信頼できるコンテンツが含まれている製品やサービスを活用することで、イノベーションを行い、目標を達成できるようにします。 最新の更新を見る.

多様性を受け入れるオープンソースの強化

Red Hat では、コード、ドキュメント、Web プロパティーにおける配慮に欠ける用語の置き換えに取り組んでいます。このような変更は、段階的に実施される予定です。詳細情報: Red Hat ブログ.

会社概要

Red Hat は、企業がコアとなるデータセンターからネットワークエッジに至るまで、各種プラットフォームや環境全体で作業を簡素化できるように、強化されたソリューションを提供しています。

Theme

© 2025 Red Hat