netconf (not netcfg, I couldn't even find a 'netcfg') does not update the /etc/syscntl.conf file when selecting "Enable Forwarding". On almost any submenu in netconf, if you press the left or right arrows, netconf will abend with a core dump. If you want a copy of a core, I can recreate this at will. e-mail to userid
These are fixed in the versions of Linuxconf in Raw Hide (ftp://ftp.redhat.com/rawhide/i386).