
Protocol Types
Protocol Number in Firewall Filters
| Number | Keyword | Protocol | Reference | 
| 26 | 
 | [BWB6] | |
| 27 | RDP | Reliable Data Protocol | [RFC908, RH6] | 
| 28 | IRTP | Internet Reliable Transaction | [RFC938, TXM] | 
| 29 | ISO Transport Protocol Class 4 | [RFC905, RC77] | |
| 30 | NETBLT | Bulk Data Transfer Protocol | [RFC969, DDC1] | 
| 31 | NFE Network Services Protocol | [MFENET, BCH2] | |
| 32 | MERIT Internodal Protocol | [HWB] | |
| 33 | SEP | Sequential Exchange Protocol | [JC120] | 
| 34 | 3PC | Third Party Connect Protocol | [SAF3] | 
| 35 | IDPR | [MXS1] | |
| 36 | XTP | XTP | [GXC] | 
| 37 | DDP | Datagram Delivery Protocol | [WXC] | 
| 38 | IDPR Control Message Transport | [MXS1] | |
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 | Protocol | 
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| 
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 | 
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| 39 | TP++ | TP++ Transport Protocol | [DXF] | 
| 40 | IL | IL Transport Protocol | [Presotto] | 
| 41 | IPv6 | IPv6 | [Deering] | 
| 42 | SDRP | Source Demand Routing Protocol | [DXE1] | 
| 43 | Routing Header for IPv6 | [Deering] | |
| 44 | Fragment Header for IPv6 | [Deering] | |
| 45 | IDRP | [Sue Hares] | |
| 46 | RSVP | Reservation Protocol | [Bob Braden] | 
| 47 | GRE | General Routing Encapsulation | [Tony Li] | 
| 48 | MHRP | Mobile Host Routing Protocol | [David Johnson] | 
| 49 | BNA | BNA | [Gary Salamon] | 
| 50 | ESP | Encap Security Payload for IPv6 | [RFC2406] | 
| 51 | AH | Authentication Header for IPv6 | [RFC2402] | 
| 52 | Integrated Net Layer Security TUBA | [GLENN] | |
| 53 | SWIPE | IP with Encryption | [J16] | 
| 54 | NARP | NBMA Address Resolution Protocol | [RFC1735] | 
| 55 | MOBILE | IP Mobility | [Perkins] | 
| CMG Router - Release 2.7 | 
