firewall package for laptop wi-fi client

["Russell L. Harris" <rlharris@broadcaster.org>]

I need recommendations for a Debian firewall package to be installed
on a laptop or notebook which is used for web browsing and web-based
email in public wi-fi hotspots.

My concern is to prevent infection or compromise of the laptop, so
that the laptop may be connected safely to a home or
office LAN which is protected by a dedicated firewall.  

My previous experience with firewalls has been limited to dedicated
machines running firewall software such as SmoothWall.

RLH