
Protocol Types
Protocol Number in Firewall Filters
| Number | Keyword | Protocol | Reference | 
| 56 | TLSP | Transport Layer Security Protocol | [Oberg] | 
| 
 | 
 | using Kryptonet key management | 
 | 
| 
 | 
 | 
 | 
 | 
| 57 | SKIP | SKIP | [Markson] | 
| 58 | ICMP for IPv6 | [RFC1883] | |
| 59 | No Next Header for IPv6 | [RFC1883] | |
| 60 | Destination Options for IPv6 | [RFC1883] | |
| 61 | 
 | any host internal protocol | [IANA] | 
| 62 | CFTP | CFTP | [CFTP, HCF2] | 
| 63 | 
 | any local network | [IANA] | 
| 64 | SATNET and Backroom EXPAK | [SHB] | |
| 65 | KRYPOTOLAN | Kryptolan | [PXL1] | 
| 66 | RVD | MIT Remote Virtual Disk Protocol | [MBG] | 
| 67 | IPPC | Internet Pluribus Packet Core | [SHB] | 
| 68 | 
 | any distributed file system | [IANA] | 
| 69 | SATNET Monitoring | [SHB] | |
| 70 | VISA | VISA Protocol | [GXT1] | 
| 71 | IPCV | Internet Packet Core Utility | [SHB] | 
| 72 | CPNX | Computer Protocol Network Executive | [DXM2] | 
| 73 | CPHB | Computer Protocol Heart Beat | [DXM2] | 
| 74 | WSN | Wang Span Network | [VXD] | 
| 75 | PVP | Packet Video Protocol | [SC3] | 
| 76 | Backroom SATNET Monitoring | [SHB] | |
| 77 | SUN ND  | [WM3] | |
| 78 | WIDEBAND Monitoring | [SHB] | |
| 79 | WIDEBAND EXPAK | [SHB] | |
| 80 | ISO Internet Protocol | [MTR] | |
| 81 | VMTP | VMTP | [DRC3] | 
| 82 | [DRC3] | ||
| 83 | VINES | VINES | [BXH] | 
| 84 | TTP | TTP | [JXS] | 
| 85 | [HWB] | ||
| 86 | DGP | Dissimilar Gateway Protocol | [DGP, ML109] | 
| CMG Router - Release 2.7 | 
