Date: Sat, 21 Nov 1998 02:39:01 -0800 From: "Brian Gallucci" <brian@briang.org> To: <freebsd-questions@FreeBSD.ORG> Subject: ICMP Message-ID: <000901be153b$273fd0e0$2900a8c0@desktop.briang.org>
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Which one of these would I use if I whanted to stop poeple from doing a port scan on my boxes, but at the same time not stopping me from be able to ping out.... This is the rule I'm using " ipfw add 3400 deny log icmp from any to 24.1.88.78 icmptype ? " I know it's one of these... Hmmmm ip 0 IP # internet protocol, pseudo protocol number icmp 1 ICMP # internet control message protocol igmp 2 IGMP # Internet Group Management ggp 3 GGP # gateway-gateway protocol ipencap 4 IP-ENCAP # IP encapsulated in IP (officially ``IP'') st 5 ST # ST datagram mode tcp 6 TCP # transmission control protocol egp 8 EGP # exterior gateway protocol pup 12 PUP # PARC universal packet protocol udp 17 UDP # user datagram protocol hmp 20 HMP # host monitoring protocol xns-idp 22 XNS-IDP # Xerox NS IDP rdp 27 RDP # "reliable datagram" protocol iso-tp4 29 ISO-TP4 # ISO Transport Protocol class 4 xtp 36 XTP # Xpress Tranfer Protocol idpr-cmtp 39 IDPR-CMTP # IDPR Control Message Transport ipv6 41 IPV6 # ipv6 ipv6-route 43 IPV6-ROUTE # routing header for ipv6 ipv6-frag 44 IPV6-FRAG # fragment header for ipv6 rsvp 46 RSVP # Resource ReSerVation Protocol gre 47 GRE # Generic Routing Encapsulation (RFC 1702) esp 50 ESP # encapsulating security payload ah 51 AH # authentication header skip 57 SKIP # SKIP ipv6-icmp 58 IPV6-ICMP # ICMP for IPv6 ipv6-nonxt 59 IPV6-NONXT # no next header for ipv6 ipv6-opts 60 IPV6-OPTS # destination options for ipv6 vmtp 81 VMTP # Versatile Message Transport ospf 89 OSPFIGP # Open Shortest Path First IGP ipip 94 IPIP # Yet Another IP encapsulation encap 98 ENCAP # Yet Another IP encapsulation divert 254 DIVERT # Divert pseudo-protocol Thanks -Brian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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