I need to match the following pattern: N.N.N

324324.234324.234324 matches, as well as 1.1.1

[I have the following pattern:](https://regexr.com/45aqq)

```
(\d*\.\d*\.\d*)

```

Problem is, it matches N.N. already at the second dot, so, how can I make the following number *mandatory*?