Cyber Recovery：使用 TLS 通訊協定擷取憑證失敗

升級至 Cyber Recovery 19.17 後，有一個可在啟用傳輸層安全性 （TLS） 通訊協定時 驗證 憑證的新選項。驗證憑證時，Cyber Recovery UI 中會顯示下列錯誤：

Mail server certificate is required when enabling TLS.

系統會從 Cyber Recovery 記錄列印下列項目。

在 crcli.log：

[2024-10-03 11:49:03.273] [DEBUG] [crcli] [restapi_client.go:384 HandleRESTAPIResponse()] : Entering
[2024-10-03 11:49:03.273] [DEBUG] [crcli] [restapi_client.go:392 HandleRESTAPIResponse()] : REST status code :500
[2024-10-03 11:49:03.273] [ERROR] [crcli] [restapi_client.go:401 HandleRESTAPIResponse()] : Failed to retrieve mail server certificate : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout
[2024-10-03 11:49:03.273] [DEBUG] [crcli] [restapi_client.go:402 HandleRESTAPIResponse()] : Exiting
[2024-10-03 11:49:03.273] [ERROR] [crcli] [libcli.go:150 CliErrorExit()] : Failed to retrieve mail server certificate : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout

在 edge.log：

[2024-10-03 11:48:53.268] [DEBUG] [edge] [restapi_client.go:200 callRestApi()] : Perform request.Post path=https://notifications:9096/irapi/v8/notifications/retrieveEmailCert
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:209 callRestApi()] : status = 500 Internal Server Error
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:410 GetCRResponse()] : Entering
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:417 GetCRResponse()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:210 callRestApi()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:116 CallCRRESTAPI()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:57 CallRESTAPIHeader()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:384 HandleRESTAPIResponse()] : Entering
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:392 HandleRESTAPIResponse()] : REST status code :500
[2024-10-03 11:49:03.272] [ERROR] [edge] [restapi_client.go:401 HandleRESTAPIResponse()] : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout
[2024-10-03 11:49:03.272] [DEBUG] [edge] [restapi_client.go:402 HandleRESTAPIResponse()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [edge] [jsonerr.go:27 JSONError()] : Entering
[2024-10-03 11:49:03.272] [ERROR] [edge] [jsonerr.go:40 JSONError()] : 500 : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout
[2024-10-03 11:49:03.272] [DEBUG] [edge] [jsonerr.go:44 JSONError()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [edge] [notifications.go:560 RetrieveEmailCert()] : Exiting
[2024-10-03 11:49:03.272] [INFO] [edge] [restauth.go:111 func1()] : POST /cr/v8/notifications/retrieveEmailCert End RetrieveEmailCert Elapsed=10.005125439s

在 notifications.log：

[2024-10-03 11:48:53.270] [INFO] [notifications] [restauth.go:68 func1()] : POST /irapi/v8/notifications/retrieveEmailCert Start RetrieveEmailCert
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [restauth.go:210 validateToken()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [restauth.go:194 DecryptToken()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [encoding.go:48 DecodeString()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [encoding.go:56 DecodeString()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [crcrypto.go:558 DecryptCFB()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [crcrypto.go:579 DecryptCFB()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [encoding.go:48 DecodeString()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [encoding.go:56 DecodeString()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [crcrypto.go:112 GenHash()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [crcrypto.go:118 GenHash()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [restauth.go:206 DecryptToken()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [restauth.go:268 ValidateTokenTime()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [restauth.go:281 ValidateTokenTime()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [restauth.go:255 validateToken()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:283 RetrieveEmailCert()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:175 ValidateMailServer()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:201 ValidateMailServerURL()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:210 ValidateMailServerURL()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:215 ValidateMailServerPort()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:222 ValidateMailServerPort()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [notifications.go:196 ValidateMailServer()] : Exiting
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [email.go:227 RetrieveEmailCert()] : Entering
[2024-10-03 11:48:53.270] [DEBUG] [notifications] [email.go:272 GetTLSConn()] : Entering
[2024-10-03 11:49:03.271] [DEBUG] [notifications] [email.go:283 GetTLSConn()] : Exiting
[2024-10-03 11:49:03.272] [ERROR] [notifications] [email.go:235 RetrieveEmailCert()] : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout
[2024-10-03 11:49:03.272] [DEBUG] [notifications] [email.go:236 RetrieveEmailCert()] : Exiting
[2024-10-03 11:49:03.272] [ERROR] [notifications] [notifications.go:321 RetrieveEmailCert()] : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout
[2024-10-03 11:49:03.272] [DEBUG] [notifications] [jsonerr.go:27 JSONError()] : Entering
[2024-10-03 11:49:03.272] [ERROR] [notifications] [jsonerr.go:40 JSONError()] : 500 : Failed to connect to mail server: dial tcp: lookup smtp-mail.com: i/o timeout
[2024-10-03 11:49:03.272] [DEBUG] [notifications] [jsonerr.go:44 JSONError()] : Exiting
[2024-10-03 11:49:03.272] [DEBUG] [notifications] [notifications.go:323 RetrieveEmailCert()] : Exiting

從版本 19.17 開始，Cyber Recovery 開始在使用 TLS 時驗證郵件伺服器憑證。
在非網域名稱系統 （DNS） 環境中，以 DNS 名稱輸入郵件伺服器失敗，因為由於環境中缺少 DNS，Cyber Recovery 無法將主機名稱解析為 IP 位址。
當 IP 位址作為 CR 中的郵件/中繼伺服器欄位，而郵件伺服器提供的憑證中沒有憑證中的 IP 時，驗證會失敗，因為憑證是針對 IP 進行驗證。 

有幾種解決方法可以使其正常工作： 

1. 將IP位址添加到郵件伺服器提供的證書中，以便驗證可以工作。
2. 在以下位置新增郵件伺服器和 IP 項目： /etc/hosts 在通知容器中，允許CR成功解決郵件伺服器和證書驗證。

有兩種選項可解決此問題：

1. 郵件伺服器使用完整網域名稱 （FQDN），Cyber Recovery 無法取得憑證。
   • 驗證是否在保管庫環境中使用 DNS 伺服器，以及它是否正常工作。
   • 如果保管庫中沒有 DNS 伺服器，請按照以下步驟操作：
     • 在通知 docker 的主機檔案中輸入 Simple Mail Transfer Protocol （SMTP） 伺服器詳細資料。
       1. 使用 SSH 連線至 Cyber Recovery。
       2. 執行此命令： 

           docker exec -it cr_notifications_1 bash

       3. 使用文字編輯器開啟檔案：

          /etc/hosts

       4. 將 SMTP 伺服器的項目新增為 IP、FQDN 和短名稱。
       5. 儲存檔案。
       6. 執行此命令以離開 docker 容器：

          exit

     • 若要在 /etc/hosts 檔案在重新開機後仍持續存在，請執行下列步驟：
       • 在中新增一行 cr-install-path>/etc/docker-compose-prod-<current-version>.yml 對於要新增到的 IP /etc/hosts 通知：
       • 以粗體反白顯示的新行應具有 SMTP FQDN，然後是 IP：
         
         SMTP.server.com：xxx.xxx.xxx.xxx
         
            
                         build: .
                image: ${registryName}/cr_notifications:${notificationsVersion}
                container_name: cr_notifications_1
                security_opt:
                        - no-new-privileges:true
                hostname: notifications
                expose:
                        - "9096"
                depends_on:
                        - postgresql
                cap_drop:
                        - ALL
                environment:
                        - LD_LIBRARY_PATH=/cr/lockbox/lib
                        - CRHOSTNAME=${dockerHostFQDN}
                        - ENABLE_TLS=${enableTLS}
                        - ENABLE_POSTFIX=${enablePostfix}
                        - GODEBUG=tlskyber=0
                extra_hosts:
                        - dockerbridge:${dockerBridge}
                        - ${dockerHostFQDN}:${dockerHost}
                        - SMTP.server.com:xxx.xxx.xxx.xxx
       • 然後執行 'crsetup.sh – forcerecreate' 無工作執行時。
2. 使用 IP 位址做為 SMTP 和 Cyber Recovery 時，無法取得憑證。

• • 在這種情況下，必須生成一個新證書以包含正在使用的IP位址。

或

• • 如果憑證是使用 FQDN 建立的，請使用 Cyber Recovery UI 中的 FQDN，而不是使用 IP 連線至 SMTP。