TCP
UDP
ICMP
User Defined
echo-reply
unreachable
source-quench
redirect
alternate-address
echo
router-advertisement
router-solicitation
time-exceeded
parameter-problem
timestamp-request
timestamp-reply
information-request
information-reply
mask-request
mask-reply
conversion-error
mobile-redirect
User Defined
(1..65535)
(1..65535)
(1-255)