---
title: "Using Configuration Block Checks"
canonical: "https://docs.infoblox.com/space/netmri760/357369944/Using%20Configuration%20Block%20Checks"
format: markdown
---
Configuration block checks allow you to specify sections of configuration files to perform matches against. A basic `ConfigBlockCheck` XML object looks like the following:

`<ConfigBlockCheck boundary-method="boundary-method" block-start="regular expression" method-specific attributes>`  
`   <statements...>`  
` </ConfigBlockCheck>`

A configuration block always starts based upon a regular expression. Examples appear in the following subsections.  
Configuration block checks also support four different `boundary-method` values, each of which provides a mechanism to determine the end of the block. Some methods are simpler than others and have specific limitations. Two additional options (`end-on-block-start` and `end-on-eof`) apply to all four methods.  
Some additional attributes are used to work with configuration block check routines, including the following:

|  |  |
| --- | --- |
| `end-on-block-start` | Used for regular expression-based configuration block checks; set to true by default; prevents overrunning the intended end of a configuration block. May apply to any of the four boundary methods. |
| `end-on-eof` | Defines the end of a block evaluation to occur at the end of a config file. May apply to any of the four boundary methods. |
| `block-end` | Used with a regular expression, defines the end of a configuration block. Applies to the regexp boundary method. |
| `indent-chars` | Define characters that will considered indentation characters. Applies to the indent boundary type. |
| `open-delim` | The initial delimiter character for the desired configuration block boundary, such as "{". Applies to the balanced-delimiters boundary type. |
| `close-delim` | The closing delimiter character for the desired configuration block boundary, such as "}". Applies to the balanced-delimiters boundary type. |
| `line-count` | Define the number of lines in a block of code that comprises the boundary. Applies to the line count boundary type. |

The four `boundary-method` types, which are used to determine the boundaries for a configuration block to check against, are described in the following subsections.