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imported>mutante (Tabelle der ICMP-Meldungstypen) |
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related: [[TCP]],[[IP]],[[ping]]
=== ICMP-Meldungstypen ===
{| class="wikitable"
|-
! Nummer
! Meldung
|-
| 0
| Echo-Antwort
|-
| 3
| Ziel nicht erreichbar
|-
| 4
| Quellreduktion
|-
| 5
| Umleitung / Änderungsanfrage
|-
| 8
| Echo-Anfrage
|-
| 9
| Router-Angebot
|-
| 10
| Router-Auswahl
|-
| 11
| Zeitüberschreitung
|-
| 12
| Parameterproblem
|-
| 13
| Zeitangabeanfrage
|-
| 14
| Zeitangabeantwort
|-
| 15
| Informationsanfrage
|-
| 16
| Informationsantwort
|-
| 17
| Adressmaskenanfrage
|-
| 18
| Adressmaskenantwort
|}
[[Category:Protocols]]
|
Revision as of 13:46, 10 February 2008
ICMP is the Internet Control Message Protocol
You can read RFC 792 for a full explanation.
The well-known ping command is a type of ICMP request.
Packet Layout:
0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-------------------------------+-------------------------------+ | Type | Code | Checksum | +-------------------------------+-------------------------------+ | Identifier | Sequence Number | +-------------------------------+-------------------------------+ | Data ... +--------------------------------------------- Type 8 = echo request. Type 0 = echo reply.
Links:
Using ICMP tunneling to steal Internet
ICMP-Meldungstypen
Nummer | Meldung |
---|---|
0 | Echo-Antwort |
3 | Ziel nicht erreichbar |
4 | Quellreduktion |
5 | Umleitung / Änderungsanfrage |
8 | Echo-Anfrage |
9 | Router-Angebot |
10 | Router-Auswahl |
11 | Zeitüberschreitung |
12 | Parameterproblem |
13 | Zeitangabeanfrage |
14 | Zeitangabeantwort |
15 | Informationsanfrage |
16 | Informationsantwort |
17 | Adressmaskenanfrage |
18 | Adressmaskenantwort |