Append configs to machine.config without replacing entire file. 

```
<enforceFIPSPolicy enabled="true"/>
<loadFromRemoteSources enabled="false" "*" />
<NetFx40_LegacySecurityPolicy enabled="true"/>
<etwEnable enabled="true"/>
```

and 
```
   <system.net>
        <defaultProxy>
        </defaultProxy>
        <connectionManagement>
            <add address="*" maxconnection="24" />
        </connectionManagement>
    </system.net>
```