Has anyone already made a script which checks a field if a user has entered a correctI haven't but 2 approaches spring to mind:
TCP/IP address ?
1. try using the hostnameToAddress function to see if the IP number translates to a valid server name.
2. as #1 won't give any answer with an invalid entry, blank entry or one that isn't registered e.g. a local network address, you could write a function that checked that there were 4 sections separated by periods and that each was a number between 0 and 255.
Also does anyone know from where to where portnumbers go ?
here is a link to a site that lists the currently assigned port numbers: http://www.iana.org/assignments/port-numbers
Cheers, Sarah
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