| About Cheatsheets Defense Links Offense |
Protocols
| Protocol | No | Description |
| hopopt | 0 | IPv6 Hop-by-Hop Option |
| icmp | 1 | Internet Control Message |
| igmp | 2 | Internet Group Management |
| ggp | 3 | Gateway-to-Gateway |
| ip | 4 | IP in IP (encapsulation) |
| st | 5 | Stream |
| tcp | 6 | Transmission Control |
| cbt | 7 | CBT |
| egp | 8 | Exterior Gateway Protocol |
| igp | 9 | any private interior gateway (Cisco IGRP) |
| bbn-rcc-mon | 10 | BBN RCC Monitoring |
| nvp-ii | 11 | Network Voice Protocol |
| pup | 12 | PUP |
| argus | 13 | ARGUS |
| emcon | 14 | EMCON |
| xnet | 15 | Cross Net Debugger |
| chaos | 16 | Chaos |
| udp | 17 | User Datagram |
| mux | 18 | Multiplexing |
| dcn-meas | 19 | DCN Measurement Subsystems |
| hmp | 20 | Host Monitoring |
| prm | 21 | Packet Radio Measurement |
| xns-idp | 22 | XEROX NS IDP |
| trunk-1 | 23 | Trunk-1 |
| trunk-2 | 24 | Trunk-2 |
| leaf-1 | 25 | Leaf-1 |
| leaf-2 | 26 | Leaf-2 |
| rdp | 27 | Reliable Data Protocol |
| irtp | 28 | Internet Reliable Transaction |
| iso-tp4 | 29 | ISO Transport Protocol Class 4 |
| netblt | 30 | Bulk Data Transfer Protocol |
| mfe-nsp | 31 | Network Services Protocol |
| merit-inp | 32 | MERIT Internodal Protocol |
| sep | 33 | Sequential Exchange Protocol |
| 3pc | 34 | Third Party Connect Protocol |
| idpr | 35 | Inter-Domain Policy Routing Protocol |
| xtp | 36 | XTP |
| ddp | 37 | Datagram Delivery Protocol |
| idpr-cmtp | 38 | IDPR Control Message Transport Proto |
| tp++ | 39 | TP++ Transport Protocol |
| il | 40 | IL Transport Protocol |
| ipv6 | 41 | Ipv6 |
| sdrp | 42 | Source Demand Routing Protocol |
| ipv6-route | 43 | Routing Header for IPv6 |
| ipv6-frag | 44 | Fragment Header for IPv6 |
| idrp | 45 | Inter-Domain Routing Protocol |
| rsvp | 46 | Reservation Protocol |
| gre | 47 | General Routing Encapsulation |
| mhrp | 48 | Mobile Host Routing Protocol |
| bna | 49 | BNA |
| esp | 50 | Encap Security Payload for IPv6 |
| ah | 51 | Authentication Header for IPv6 |
| i-nlsp | 52 | Integrated Net Layer Security TUBA |
| swipe | 53 | IP with Encryption |
| narp | 54 | NBMA Address Resolution Protocol |
| mobile | 55 | IP Mobility |
| tlsp | 56 | Transport Layer Security Protocol (Kryptonet keymgmt) |
| skip | 57 | SKIP |
| ipv6-icmp | 58 | ICMP for IPv6 |
| ipv6-nonxt | 59 | No Next Header for IPv6 |
| ipv6-opts | 60 | Destination Options for IPv6 |
| - | 61 | any host internal protocol |
| cftp | 62 | CFTP |
| - | 63 | any local network |
| sat-expak | 64 | SATNET and Backroom EXPAK |
| kryptolan | 65 | Kryptolan |
| rvd | 66 | MIT Remote Virtual Disk Protocol |
| ippc | 67 | Internet Pluribus Packet Core |
| - | 68 | any distributed file system |
| sat-mon | 69 | SATNET Monitoring |
| visa | 70 | VISA Protocol |
| ipcv | 71 | Internet Packet Core Utility |
| cpnx | 72 | Computer Protocol Network Executive |
| cphb | 73 | Computer Protocol Heart Beat |
| wsn | 74 | Wang Span Network |
| pvp | 75 | Packet Video Protocol |
| br-sat-mon | 76 | Backroom SATNET Monitoring |
| sun-nd | 77 | SUN ND PROTOCOL-Temporary |
| wb-mon | 78 | WIDEBAND Monitoring |
| wb-expak | 79 | WIDEBAND EXPAK |
| iso-ip | 80 | ISO Internet Protocol |
| vmtp | 81 | VMTP |
| secure-vmtp | 82 | SECURE-VMTP |
| vines | 83 | VINES |
| ttp | 84 | TTP |
| nsfnet-igp | 85 | NSFNET-IGP |
| dgp | 86 | Dissimilar Gateway Protocol |
| tcf | 87 | TCF |
| eigrp | 88 | EIGRP |
| ospfigp | 89 | OSPFIGP |
| sprite-rpc | 90 | Sprite RPC Protocol |
| larp | 91 | Locus Address Resolution Protocol |
| mtp | 92 | Multicast Transport Protocol |
| ax.25 | 93 | AX.25 Frames |
| ipip | 94 | IP-within-IP Encapsulation Protocol |
| micp | 95 | Mobile Internetworking Control Pro |
| scc-SP | 96 | Semaphore Communications Sec. Pro |
| etherip | 97 | Ethernet-within-IP Encapsulation |
| encap | 98 | Encapsulation Header |
| - | 99 | any private encryption scheme |
| gmtp | 100 | GMTP |
| ifmp | 101 | Ipsilon Flow Management Protocol |
| pnni | 102 | PNNI over IP |
| pim | 103 | Protocol Independent Multicast |
| aris | 104 | ARIS |
| scps | 105 | SCPS |
| qnx | 106 | QNX |
| a/n | 107 | Active Networks |
| ipcomp | 108 | IP Payload Compression Protocol |
| snp | 109 | Sitara Networks Protocol |
| compaq-peer | 110 | Compaq Peer Protocol |
| ipx-in-ip | 111 | IPX in IP |
| vrrp | 112 | Virtual Router Redundancy Protocol |
| pgm | 113 | PGM Reliable Transport Protocol |
| - | 114 | any 0-hop protocol |
| l2tp | 115 | Layer Two Tunneling Protocol |
| ddx | 116 | D-II Data Exchange (DDX) |
| iatp | 117 | Interactive Agent Transfer Protocol |
| stp | 118 | Schedule Transfer Protocol |
| srp | 119 | SpectraLink Radio Protocol |
| uti | 120 | UTI |
| smp | 121 | Simple Message Protocol |
| sm | 122 | SM |
| ptp | 123 | Performance Transparency Protocol |
| isis-over-ipv4 | 124 | ISIS-over-IPv4 |
| fire | 125 | FIRE |
| crtp | 126 | Combat Radio Transport Protocol |
| crudp | 127 | Combat Radio User Datagram |
| sscopmce | 128 | SSCOPMCE |
| iplt | 129 | IPLT |
| sps | 130 | Secure Packet Shield |
| pipe | 131 | Private IP Encapsulation within IP |
| sctp | 132 | Stream Control Transmission Protocol |
| fc | 133 | Fibre Channel |
| - | 134-254 | Unassignedraw |
| - | 255 | Reserved |