--- sourceDocument: Yokohama IT Operations Management sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/yokohama/it-operations-management Release : - yokohama ft:locale : - en-US ft:publication_title : - Yokohama IT Operations Management ft:clusterId : - itom bundleId : - itom workflow : - Technology --- # Configuration file options # Configuration file options {#ariaid-title1} * Release version: Yokohama * * Updated March 12, 2026 * * ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 4 minutes to read Summarize ![AI sparkle icon](https://servicenow.com/docs/portal-asset/ai-sparkle-icon) Summarized using AI This content was generated using new OpenAI-powered functionality. Results are provided on an as is basis and are not guaranteed to be accurate or complete. ## Summary of Configuration File Options for acc.yml (Yokohama Release) Theacc.ymlconfiguration file enables ServiceNow customers to control the settings of the Agent Client Collector (ACC) for optimized connectivity, security, logging, and operational behavior. These configurations govern how the ACC interacts with MID Servers, handles authentication, manages plugins, and processes network communication. Proper configuration ensures secure, reliable, and efficient agent operations within your ServiceNow environment. Show full answer Show less ## Basic Configuration Options * **Agent Identification:** The `name` parameter sets the agent name, defaulting to the host's hostname, allowing clear registration on the ServiceNow instance. * **MID Server Communication:** `backend-url` lists MID Webserver endpoints for resilient connections, used primarily when `enable-auto-mid-selection` is enabled. * **Authentication:** Parameters `api-key`, `user`, and `password` authenticate the agent to the MID Server using secure, encrypted credentials; these are mandatory for agent startup. * **Logging Control:** The `log-level` defines the verbosity of the ACC log file, supporting levels from Panic to Debug for troubleshooting and monitoring needs. * **Security via Allow List:** The `allow-list` designates a JSON file specifying permitted check commands, enhancing security by restricting agent actions. This can be disabled if necessary. * **Application Classification:** The `applclassificationbehavior` setting controls whether shell Configuration Items (CIs) are created on the agent, ranging from off to full discovery modes. ## Advanced Configuration Options * **Plugin Security:** `verify-plugin-signature` enables validation of plugin signatures to ensure integrity, which can be disabled for development or self-signed plugins. * **TLS Verification:** The `insecure-skip-tls-verify` flag lets you control whether TLS certificates are fully verified, enhancing security when set to false. * **Auto MID Server Selection:** `enable-auto-mid-selection` allows the agent to automatically connect to the optimal MID Server endpoint. * **Command Execution Preference:** `check-command-prefer-installed` specifies whether to prefer host system executables over ACC plugin executables. * **Log Redaction:** `command-log-redaction-regex` defines a regex pattern to mask sensitive information in logs and payloads, protecting credentials and user data. * **PowerShell Execution:** The `powershellinstalled` parameter enables or disables PowerShell command execution on agents. * **Allow List Scope:** `allow-list-global-only` restricts allowed commands strictly to those defined in the specified allow list, ignoring bundled plugin allow lists for enhanced security. * **Asset Plugin Management:** `disable-assets` controls whether ACC plugins can be downloaded during execution, supporting air-gapped or restricted environments. * **Agent Upgrade Source:** `agent-upgrade-url-path` defines a custom URL for downloading ACC installer packages during upgrades. * **Certificate Rotation:** `certificate-rotation-days-out` sets how many days before expiration the agent attempts certificate rotation, maintaining secure communications. * **Pattern Execution:** `enable-patterns-on-agent` enables detailed application pattern discovery on the agent when using ACC for pattern execution. * **Keepalive Network Settings:** Parameters `keepalive-filter-nics` and `keepalive-numbernicsperiptype` control which network interfaces and how many per IP type are reported during keepalive actions. ## Proxy Auto-Configuration (PAC) Parameters * **PAC File Location:** The mandatory `pac-file` points to a local or remote PAC file to configure proxy settings for the agent. * **Caching and Refresh:** `pac-cache-ttl` defines how long proxy rules are cached, and `pac-refresh-interval` controls how often the agent checks for updates to the PAC file, ensuring up-to-date proxy configurations. * **Connection Timeout:** `pac-dial-timeout` sets the timeout duration when establishing proxy connections. * **Error Recovery:** `pac-reset-on-connect-failure` enables the agent to clear the PAC cache and refresh the PAC file upon proxy connection failures, improving resilience. ## Practical Benefits Configuring the `acc.yml` file with these options empowers ServiceNow customers to: * Ensure secure, authenticated communication between ACC agents and MID Servers. \< Options available in the acc.yml configuration file. {#acc-yml-options__table_w45_t4x_dxb__entry__5} | Option | Type | Default | Description | Example | |-|-|-|-|-| | name | String | Agent_\ | Agent name registered on the SN instance can be specified by the user. The result of the 'hostname' command is used as the default. | `name: ` | | backend-url | List | wss://127.0.0.1:8800/ws/events | List of MID Webserver endpoint URLs to communicate with. If communication cannot be configured with the first URL, the system moves to the ensuing URLs until it establishes a connection. Works when `enable-auto-mid-selection=true` | `backend-url: :` | | api-key | String | \ | API key used by the MID Server to authenticate incoming agent connections. Value is encrypted on initial agent startup. | `api-key: ` | | user | String | admin | Username used for basic authentication. If this parameter is empty, the agent does not start. | `user: "agent-01"` | | password | String | admin | Password used for basic authentication. Value is encrypted on initial agent startup. If this parameter is empty, the agent does not start. | `password: ` | | log-level | String | Info | Amount of logging to appear in the acc.log file. Values: * Panic * Fatal * Error * Warn * Info * Debug {#acc-yml-options__ul_bfh_csx_dxb} | `log-level: debug` | | allow-list | String | /etc/servicenow/agent-client-collector/check-allow-list.json | Path to the JSON file that contains the list of check commands the agent can execute. Comment out this parameter to disable the allow-list. If this parameter is empty, the allow-list is disabled. | `allow-list: /etc/agent/check-allow-list.json` | | appl_classification_behavior | List | simple | Indicates whether to enable shell CI creation on the agent. Possible values are: * simple: Indicates that shell CI creation is enabled. * off: Indicates that no shell CIs are created for the application. * full: Indicates that complete Discovery of the application CIs is performed using patterns. {#acc-yml-options__ul_tky_2qj_5bc} | `appl_classification_behavior: off` | [Table 1. Basic configuration options for acc.yml configuration file] {#acc-yml-options__table_w45_t4x_dxb} {#acc-yml-options__table_hcj_gtx_dxb__entry__5} | Option | Type | Default | Description | Example | |-|-|-|-|-| | verify-plugin-signature | Boolean | true | Verifies the plugin signature before execution. Disable when using self-signed or developmental plugins. | `verify-plugin-signature: true` | | insecure-skip-tls-verify | Boolean | true | Determines whether to verify the certificate when connecting to the MID Server. Set as false to enforce full TLS verification. | `insecure-skip-tls-verify: true` | | enable-auto-mid-selection | Boolean | true | Controls the Auto MID Selection feature to connect to the optimal MID Web Server provided by the instance. | `enable-auto-mid-selection: true` | | check-command-prefer-installed | Boolean | false | Indicates the preference of executables provided within ACC plugins or executables available in the host system's PATH variable. * false = ACC plugins * true = Executables in the host system's PATH variable {#acc-yml-options__ul_nqy_xmg_1cc} | `check-command-prefer-installed: false` | | command-log-redaction-regex | String | `'-password[=\s](https://servicenow-prod.fluidtopics.net/[^"\s]+)|-[pP]\s([^"\s]+)|--user\s[^":\s]+:([^\s"]+)|-pw\s([^"\s]+)|-u\s[^":\s]+:([^\s"]+)|[^"\s]+/([^\s"]+)@'` | The regex to search for and to remove potentially sensitive user information from ACC logs and payloads. | `'-password[=\s](https://servicenow-prod.fluidtopics.net/[^"\s]+)|-[pP]\s([^"\s]+)|--user\s[^":\s]+:([^\s"]+)|-pw\s([^"\s]+)|-u\s[^":\s]+:([^\s"]+)|[^"\s]+/([^\s"]+)@'` | | powershell_installed | Boolean | false | Disables powershell command execution on agents. | `powershell_installed: true` | | allow-list-global-only | Boolean | false | Set to true to enhance security by relying only on the allow list defined in the allow-list parameter you specify during configuration, ignoring allow lists bundled with ACC plugins. | `allow-list-global-only: false` | | disable-assets | Boolean | false | Indicates whether a check running with an asset (plugin) dependency fetches ACC plugins from the ServiceNow® instance, or uses a copy of the plugins in its cache folder. When set to false, additional assets can be downloaded during check execution. Set to true to enhance security and ensure that no new plugins are downloaded during check execution. | `disable-assets: false` | | agent-upgrade-url-path | String | https://install.service-now.com/glide/distribution/builds/package/app-signed/ | Indicates an alternate web server URL endpoint for downloading ACC installer packages when performing selective upgrade. | `agent-upgrade-url-path: https://:/acc_installers` | | certificate-rotation-days-out | Integer | 28 | Indicates the number of days before certificate expiration that an agent attempts to rotate its certificate. | `certificate-rotation-days-out=28` | | enable-patterns-on-agent | Boolean | false | Enables gathering details on the applications which run on the Agent Client Collector. This parameter is required only when using the Agent Client Collector for pattern execution. | `enable-patterns-on-agent: true` | | keepalive-filter-nics | Boolean | true | Indicates whether Network Interface Controllers (NICs) are filtered on the agent (true) or the MID Server (false) during keepalive action. | `keepalive-filter-nics: true` | | keepalive-number_nics_per_ip_type | Integer | 1 | Indicates the maximum number of Network Interface Controllers (NICs) per IP type (IP4, IP6) sent with a keepalive action. The indicated number is sent for each IP type. For example, if the value is 1, a maximum of 2 NICs are sent (0-1 each for IP4 and IP6). If the value is 4, a maximum of 8 NICs are sent (0-4 each for IP4 and IP6). | `keepalive-number_nics_per_ip_type: 4` | [Table 2. Advanced configuration options for acc.yml configuration file] {#acc-yml-options__table_hcj_gtx_dxb} {#acc-yml-options__table_mw3_cy3_vfc__entry__5} | Option | Type | Default | Description | Example | |-|-|-|-|-| | pac-file | String (Required) | "" (empty) | Specifies the location of the PAC file to use for proxy configuration. Can be either: * A local file path (such as: file:///etc/proxy/proxy.pac) * A remote URL (such as: https://proxy.company.com/proxy.pac) {#acc-yml-options__ul_rgb_jy3_vfc} | `pac-file: "https://proxy.company.com/proxy.pac"` | | pac-cache-ttl | Duration (Optional) | 30m (30 minutes) | Determines how long proxy rules from the PAC file are cached in memory. Setting this to 0 disables caching. | `pac-cache-ttl: "1h" # Cache for 1 hour` | | pac-refresh-interval | Duration (Optional) | 30m (30 minutes) | Specifies how often the agent is to check for updates to the PAC file. Useful when the PAC file is hosted remotely and may be updated periodically. | `pac-refresh-interval: "15m" # Check for updates every 15 minutes` | | pac-dial-timeout | Duration (Optional) | 30s (30 seconds) | Indicates the amount of time to wait when establishing a connection through a proxy server before timing out. | `pac-dial-timeout: "10s" # 10 second timeout` | | pac-reset-on-connect-failure | Boolean (Optional) | true | When set to true, the agent clears the PAC cache and attempts to refresh the PAC file if a proxy connection proxy fails. This helps recover from proxy configuration changes or temporary proxy issues. | `pac-reset-on-connect-failure: true` | [Table 3. Proxy Auto-Configuration (PAC) file parameters] {#acc-yml-options__table_mw3_cy3_vfc}