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imported>mutante (Tabelle der ICMP-Meldungstypen) |
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related: [[TCP]],[[IP]],[[ping]] |
related: [[TCP]],[[IP]],[[ping]] |
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=== ICMP-Meldungstypen === |
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{| class="wikitable" |
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|- |
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! Nummer |
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! Meldung |
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|- |
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| 0 |
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| Echo-Antwort |
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|- |
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| 3 |
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| Ziel nicht erreichbar |
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|- |
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| 4 |
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| Quellreduktion |
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|- |
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| 5 |
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| Umleitung / Änderungsanfrage |
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|- |
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| 8 |
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| Echo-Anfrage |
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|- |
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| 9 |
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| Router-Angebot |
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|- |
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| 10 |
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| Router-Auswahl |
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|- |
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| 11 |
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| Zeitüberschreitung |
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|- |
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| 12 |
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| Parameterproblem |
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|- |
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| 13 |
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| Zeitangabeanfrage |
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|- |
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| 14 |
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| Zeitangabeantwort |
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|- |
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| 15 |
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| Informationsanfrage |
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|- |
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| 16 |
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| Informationsantwort |
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|- |
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| 17 |
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| Adressmaskenanfrage |
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|- |
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| 18 |
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| Adressmaskenantwort |
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|} |
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[[Category:Protocols]] |
[[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 |
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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 |