Content added Content deleted
imported>DrOwl No edit summary |
imported>mutante (Codewerte für Meldung "Ziel nicht erreichbar") |
||
| (7 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
ICMP is the '''I'''[[Internet|nternet]] '''C'''ontrol '''M'''essage '''P'''[[:Category:Protocols|rotocol]] |
|||
You can read [http://info-x.co.uk/rfcview.asp?id=792 RFC 792] for a full explanation. |
|||
ICMP is the INTERNET CONTROL MESSAGE PROTOCOL |
|||
The well-known [[ping]] command is a type of ICMP request. |
|||
you can read the [http://info-x.co.uk/rfcview.asp?id=792 RFC] for a full explonation. |
|||
Packet Layout: |
|||
there are lots of other sites about this like [[wikipedia:ICMP]] |
|||
<pre> |
|||
ping is a type of ICMP |
|||
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. |
|||
</pre> |
|||
Links: |
|||
[http://64.233.161.104/search?q=cache:nulldigital.net/blog/view.php%3Fid%3D41+ Using ICMP tunneling to steal Internet] |
|||
[http://www.eventhelix.com/RealtimeMantra/Networking/Icmp.pdf Icmp.pdf] |
|||
[http://www.cs.uit.no/~daniels/PingTunnel/ PingTunnel] |
|||
related: [[TCP]],[[IP]],[[ping]] |
|||
=== ICMP-Meldungstypen === |
|||
{| class="wikitable" |
|||
|- |
|||
! Typ |
|||
! 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 |
|||
|} |
|||
=== Codewerte für Meldung "Ziel nicht erreichbar" === |
|||
{| class="wikitable" |
|||
|- |
|||
! Code |
|||
! Meldung |
|||
|- |
|||
| 0 |
|||
| Netz nicht erreichbar |
|||
|- |
|||
| 1 |
|||
| Host nicht erreichbar |
|||
|- |
|||
| 2 |
|||
| Protokoll nicht erreichbar |
|||
|- |
|||
| 3 |
|||
| Port nicht erreichbar |
|||
|- |
|||
| 4 |
|||
| Fragmentierung erforderlich und DF eingestellt |
|||
|- |
|||
| 5 |
|||
| Quellroute fehlgeschlagen |
|||
|- |
|||
| 6 |
|||
| Zielnetz unbekannt |
|||
|- |
|||
| 7 |
|||
| Zielhost unbekannt |
|||
|- |
|||
| 8 |
|||
| Absenderhost isoliert |
|||
|- |
|||
| 9 |
|||
| Kommunikation mit Zielnetz administrativ verboten |
|||
|- |
|||
| 10 |
|||
| Kommunikation mit Zielhost administrativ verboten |
|||
|- |
|||
| 11 |
|||
| Netz für Gerätetyp nicht erreichbar |
|||
|- |
|||
| 12 |
|||
| Host für Diensttyp nicht erreichbar |
|||
|} |
|||
[[Category:Protocols]] |
|||
[[Category:Networking]] |
|||
Latest revision as of 14:30, 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[edit]
| Typ | 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 |
Codewerte für Meldung "Ziel nicht erreichbar"[edit]
| Code | Meldung |
|---|---|
| 0 | Netz nicht erreichbar |
| 1 | Host nicht erreichbar |
| 2 | Protokoll nicht erreichbar |
| 3 | Port nicht erreichbar |
| 4 | Fragmentierung erforderlich und DF eingestellt |
| 5 | Quellroute fehlgeschlagen |
| 6 | Zielnetz unbekannt |
| 7 | Zielhost unbekannt |
| 8 | Absenderhost isoliert |
| 9 | Kommunikation mit Zielnetz administrativ verboten |
| 10 | Kommunikation mit Zielhost administrativ verboten |
| 11 | Netz für Gerätetyp nicht erreichbar |
| 12 | Host für Diensttyp nicht erreichbar |