Regular Expression Technique in ColdFusion

There are actually plenty of well-developed regular expression strings available on the Internet, which you can simply "copy and use."  You don't have to spend too much time figuring-out the correct pattern of chicken scratches.

It's not quite as convenient as saying  "use Regexp::Common::URL;" but one cannot have everything in "less-enlightened" languages like CF...

You do need to understand them, however.  When you look at the string given in a previous reply, you do need to understand the meaning of all those symbols, and you need to practice the art of being able to cook them up extemporaneously.

newguy1300 wrote: I'm just basically looking to see if the backslash "/" character is in the string.

The simplest method for this would be <cfif find(ipstring,"/") GT 0>

A regex expression that might do what you want, completely untested would be ([0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}\[0-9]{1,???}  I'm not sure how many digits you want to allow after the slash.  Replace the question marks with that number.