Stay Connected To Internet is a small utility that can prevent a network device from 'sleeping'. It does this by issuing commands on a timely basis to the network device.

It is standard in some Puppy Versions, including Puppy525, IcePuppy.

It is built in to some Puppies, go to PuppyMenu > Internet > Stay Connected to Internet

Otherwise install apprioprate Pets Pet File from the forum post.

Frisbee Frisbee network tool

forum post.