ICMP_Scanning_41
ICMP Usage in Scanning
41
Copyright Ó Ofir Arkin, 2000
http://www.sys-security.com
Type
Name
Code
0
ECHO Reply
0 No Code
1
Unassigned
2
Unassigned
3
Destination Unreachable29
0 Net Unreachable
1 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 Destination Network Unreachable for Type of
Service.
12 Destination Host Unreachable for
Type of Service.
13 Communication Administratively Prohibited.
14 Host Precedence Violation
15 Precedence cutoff in effect
4
Source Quench 0 No Code
5
Redirect
0 Redirect Datagram for the Network (or subnet)
1 Redirect Datagram for the Host
2 Redirect Datagram for the Type of Service and
Network
3 Redirect Datagram for the Type of Service and
Host
6
Alternate Host Address 0 Alternate Address for Host
7
Unassigned
8
Echo
0 No Code
9
Router Advertisement 0 No Code
10
Router Selection 0 No Code
11
Time Exceeded
0 Time to Live exceeded in Transit
1 Fragment Reassembly Time Exceeded
12
Parameter Problem
0 Pointer indicates the error
1 Missing a Required Option
2 Bad Length
13
Timestamp 0 No Code
14
Timestamp Reply 0 No Code
29
RFC 972 defines codes 1-5. RFC 1122 defines codes 6-12. RFC 1812 defines codes 13-15.
