Notes on Iprarp, Ipread, and Rarpset ------------------------------------ These three programs can be used to set an environment variable to your IP address, to aid in dynamic IP configuration. The documentation is pretty good. The cleanest and least reliable method is to use Rarpset, which directly sets the environment variable you specify. Your packet driver must support RARP and it must be working for you to use it. Note that directly setting an environment variable is not something that a DOS program is "supposed" to do, so Rarpset may not work with every version of DOS. Iprarp creates a batch file that you can then use to set the MYIP environment variable to your IP address. Again, your packet driver must support RARP. This way is more reliable than directly setting the variable. Ipread reads your IP address from the screen at connect time and creates a batch file that sets the MYIP environment variable to your IP address. This method works with any packet driver, regardless of whether it supports RARP or not. The batch file is written to standard output, which is the screen by default, so you need to use redirection: ipread "IP address is" > setip.bat Note the string in quotes. Ipread will use the first four decimal numbers it finds after that string as your IP address. The default string is "address". You may have to change the string to get Ipread to work. Slipper and Cslipper may have trouble with their RARP support, so you might have to use Ipread with them (I did).