This is one regex that is limited to your provided exampel
\\\\\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\\\w+\\\w+\.\w+
And this is a slightly more generic one, if the server name can be other than an IP address.
\\\\[\w\d.]+\\\w+\\\w+\.\w+
I recommend to get a tool for testing regular expressions, such as
RegExTest[
^]
or
Visual Regexp[
^]