VBScript Regular Expressions to check IP address validity with some adtional characters

Question

How to create VB script Irregular expression syntax to check the VPparam (IP address validity) When the last octatat of the IP address is a range between ip's (x-y) and between each IP we can put the "," separator in order to add another IP

example of VBparam

VBparam=172.17.202.1-20

VBparam=172.17.202.1-10,192.9.200.1-100

VBparam=172.17.202.1-10,192.9.200.1-100,180.1.1.1-20

THX yael

Answer 1

I believe the term you're looking for is "regular expression", not "irregular" - might help when google searching. I don't know enough VB to provide a complete script, but the pattern you're looking for is:
(\d{1,3}\.){3}\d{1,3}(\-\d{1,3})?(,(\d{1,3}\.){3}\d{1,3}(\-\d{1,3})?)*

This will not validate that X < Y, or that each octet is in a proper range, i.e. 999.999.999.999 would be valid. You can't validate X < Y in regex (abbrev. for regular expression), so you'll need to use pattern captures to validate those yourself in the script. If you wish to validate that octets are in the proper range, replace \d{1,3} with ((1\d{2})|(2[0-4]\d)|(25[0-5])|\d{1,2}) each time it appears in the above script.