XP and 98SE networked through a Linksys 4 Port router to a Cable Modem.
No problem with internet access.
I can only access the XP machine from the 98 by having both Zone Alarm and Internet Connection Firewall disabled. If I enable either one on the XP, I cannot ping from the 98 which blocks file and printer sharing.
There must be a work-around so I don't leave the XP un protected.