Raw sockets and system compromise

I've been trying to secure my Slackware Linux 8.0 system
by disabling unneeded services and closing open ports.
I've already enabled ipchains for linux 2.2.19, but
I still want to close down most of the ports.

I'm able to close down all listening ports except for
these (wrapping fixed by me):

# netstat -lp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
raw 0 0 *:icmp *:* 7
-
raw 0 0 *:tcp *:* 7
-

Notice that the program name is not given even with -p.

What are these "raw" ports used for?

Could this be a sign of system compromise?