My only connection to the net from my home linux box is PPP with dynamic IP addressing. I configured Red Hat 5.2 as standalone, then added my PPP following the information in the installation guide. While logged in with an X windows session, I can use usernet to connect to my ISP, and the network connection is fine. However, once the network connection is made, X windows refuses permission to open any new windows. This seems to be because the scripts in /etc/config/network-scripts have changed my hostname from localhost.localdomain to something like PPPuser121.scripps.edu, where PPPuser121 is my ISP's idea of my hostname (different on each login) and scripps.edu is my ISP's domain. To get out of this jam, I can su to root and do "hostname localhost.localdomain" and everthing is fine. Shouldn't the PPP scripts refrain from messing with the hostname?
This is fixed in the initscripts that ship with 6.0