Hi Nic, thanks for the reply.
I'm not sure what you mean by this. FTP is a file transfer program not an editor. Yes, I have used FTP to download the whitelist to my PC, edited the file and used FTP to put it back. This works provided I keep the DOS end of lines when editing. I am in a Linux environment both at the client and server end. I guess that doing the FTP transfers in ascii or binary mode will also have an effect for some people. Binary mode will leave the file unchanged while ascii mode may change the end of line characters depending on the operating systems involved.
I have seen many posts on here from people unable to get the whitelist to work and many from people for whom it works perfectly. I am just offering this end of line problem as a possible solution to the problem. It is something I have observed on my installation and keeping the DOS end of line characters solves the problem. I don't think users of IP Trap should have to worry about keeping the file in DOS format if they are working in a Unix / Linux environment, hence my question about whether it is possible to code the addon so that it works with either type of end of line characters.