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ICMP is the [[Internet|'''I'''nternet]] '''C'''ontrol '''M'''essage [[:Category:Protocols|'''P'''rotocol]]
The well-known [[ping]] command is a type of ICMP request.▼
Packet Layout:
▲[[ping]] is a type of ICMP
<pre>
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+---------------------------------------------
Type 8 = echo request. Type 0 = echo reply.
</pre>
related: [[TCP]]▼
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]▼
Links:
▲
[http://www.eventhelix.com/RealtimeMantra/Networking/Icmp.pdf Icmp.pdf]
[http://www.cs.uit.no/~daniels/PingTunnel/ PingTunnel]
▲related: [[TCP]],[[IP]],[[ping]]
[[Category:Protocols]]
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Revision as of 19:03, 19 July 2006
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: