> **Documentation Update:** Product documentation previously located in `/website` has moved to the [`hashicorp/web-unified-docs`](https://github.com/hashicorp/web-unified-docs) repository, where all product documentation is now centralized. Please make contributions directly to `web-unified-docs`, since changes to `/website` in this repository will not appear on developer.hashicorp.com.
The default configuration included with the Boundary Client Agent upon installation will be suitable for most users. If you want to make changes to the configuration, the configuration file is located in the following directory:
The configuration file contains the following fields:
- `alias_refresh_interval` - Specifies how often to refresh the alias cache. The default value is 1 minute.
Example:
```hcl
alias_refresh_interval="60s"
```
- `dns_request_timeout` - Specifies for how long the Client Agent DNS request handling, including any recursion, is allowed to run before it is canceled.
Example:
```hcl
dns_request_timeout="300s"
```
- `interface_to_use` - Specifies the interface to use instead of the default.
Example:
```hcl
interface_to_use="en1"
```
- `log_file` - Specifies where to write the Boundary Client Agent log file to.
- `log_level` - Specifies the verbosity of the Client Agent logs.
Example:
```hcl
log_level="DEBUG"
```
- `log_to_stdout` - Logs to STDOUT in addition to the `boundary-client-agent.log` file.
Example:
```hcl
log_to_stdout=false
```
- `override_upstream_dns_servers` - Lists the DNS servers that should be used for recursing non-Boundary requests, overriding those configured on the system.
1. Change the configuration settings, and save the file.
<Note>
You must restart the Client Agent to update some configuration settings.
However, when you restart the Client Agent, it closes any existing sessions.
Other configuration settings can be updated by only reloading the configuration file, which does not affect any existing sessions.
</Note>
1. Either reload the configuration file or restart the Client Agent.
You can change the following configuration values by reloading the configuration file, which will not disrupt any existing sessions:
- `dns_request_timeout`
- `log_file`
- `log_level`
- `state_file`
- `override_upstream_dns_servers`
- `v4_prefix`
Run the following command to reload the configuration file:
```shell-session
$ sudo pkill -1 boundary-client-agent
```
If you want to update another configuration value, you can restart the Client Agent using the following commands, however it will close any existing sessions:
