Appendix C. Lists of Reserved Ports, ICMP Types and Codes, and Internet Protocols
Type | Name | Reference |
19 | Reserved (for Security) | [Solo] |
Reserved (for Robustness Experiment) | [ZSu] | |
30 | Traceroute | [RFC1393] |
31 | Datagram Conversion Error | [RFC1475] |
32 | Mobile Host Redirect | [David Johnson] |
33 | IPv6 | [Bill Simpson] |
34 | IPv6 | [Bill Simpson] |
35 | Mobile Registration Request | [Bill Simpson] |
36 | Mobile Registration Reply | [Bill Simpson] |
37 | Domain Name Request | [Simpson] |
38 | Domain Name Reply | [Simpson] |
39 | SKIP | [Markson] |
40 | Photuris | [RFC2521] |
Reserved | [JBP] |
Some ICMP types have codes attached.
ICMP type | Name | Code | Description |
0 | Echo Reply | 0 | No Code |
1 | Unassigned |
|
|
2 | Unassigned |
|
|
3 | Destination Unreachable | 0 | Net Unreachable |
|
| 1 | Host Unreachable |
|
| 2 | Protocol Unreachable |
|
| 3 | Port Unreachable |
|
| 4 | Fragmentation Needed and |
|
|
| Don’t Fragment was Set |
|
| 5 | Source Route Failed |
|
| 6 | Destination Network |
|
|
| Unknown |
|
| 7 | Destination Host Unknown |
|
| 8 | Source Host Isolated |
|
| 9 | Communication with |
|
|
| Destination Network is |
|
|
| Administratively Prohibited |
|
| 10 | Communication with |
|
|
| Destination Host is |
|
|
| Administratively Prohibited |
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