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Type 3 Codes

Written by The Geekette on July 9, 2006 – 7:29 pm
Posted in Networking | No Comments »

 

Code Function
0 Net Unreachable
31 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
11 Network Unreachable for Type of Service
12 Destination Host Unreachable for Type of Service
13 Communication Administratively Prohibited


ICMP Types and Codes

Written by The Geekette on July 9, 2006 – 7:23 pm
Posted in Networking | No Comments »
TYPE CODE FUNCTION
0/8 0 Echo Response / Request (Ping)
3 0-15 Destination Unreachable
4 0 Source Quench
5 0-3 Redirect
11 0-1 Time Exceeded
12 0 Parameter Fault
13/14 0 Time stamp request / reponse
17/18 0 Subnet mask request / response


IP Headers Structure

Written by The Geekette on July 9, 2006 – 7:07 pm
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Version IHL Type of Service Total Length
Identification Flags Fragment Offset
Time to Live Protocol Header Checksum
Source Address
Destination Address
Options Padding