Windows Security Tutorials - Herong's Tutorial Examples
Dr. Herong Yang, Version 3.00

224.0.0.1 - The All Hosts Multicast Group

This section provides a quick introduction of the All Hosts Multicast Group, 224.0.0.1. All systems on the network must join the All Hosts Multicast Group on all its IP interfaces.

The first IP multicast address, 224.0.0.1, is called the All Hosts Multicast Group. All systems on the network must join the All Hosts Multicast Group on all its IP interfaces. Here is what I did to verify this on my Windows XP system:

I used the "ipconfig /all" to see all my IP interfaces:

C:\herong>ipconfig /all
...

Ethernet adapter Wireless Network Connection:
 Connection-specific DNS Suffix  . : myhome.westell.com
 Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG ...
 Physical Address. . . . . . . . . : 00-19-D2-D3-AA-D3
 Dhcp Enabled. . . . . . . . . . . : Yes
 Autoconfiguration Enabled . . . . : Yes
 IP Address. . . . . . . . . . . . : 192.168.0.5
 Subnet Mask . . . . . . . . . . . : 255.255.255.0
 Default Gateway . . . . . . . . . : 192.168.0.1
 DHCP Server . . . . . . . . . . . : 192.168.0.1
 DNS Servers . . . . . . . . . . . : 192.168.1.1

Ethernet adapter Local Area Connection:
 Connection-specific DNS Suffix  . : myhome.westell.com
 Description . . . . . . . . . . . : Broadcom NetXtreme Gigabit Eth...
 Physical Address. . . . . . . . . : 00-16-D4-E9-C5-19
 Dhcp Enabled. . . . . . . . . . . : Yes
 Autoconfiguration Enabled . . . . : Yes
 IP Address. . . . . . . . . . . . : 192.168.0.4
 Subnet Mask . . . . . . . . . . . : 255.255.255.0
 Default Gateway . . . . . . . . . :
 DHCP Server . . . . . . . . . . . : 192.168.0.1
 DNS Servers . . . . . . . . . . . : 192.168.1.1

Ok. I have 2 IP interfaces: a wireless interface and an Ethernet interface. Now I used the "netsh interface ip show joins" to see who joined the All Hosts Multicast Group:

C:\herong>netsh interface ip show joins

Interface Addr   Multicast Group
---------------  ---------------
192.168.0.5      224.0.0.1
192.168.0.4      224.0.0.1

This confirms that 2 interfaces on my system joined the All Hosts Multicast Group.

Last update: 2008.

Table of Contents

 About This Windows Security Book

 Windows 8: System Security Review

 Windows 8: System Security Protection

 Windows 8 System Recovery

 Windows 8 Defender for Real-Time Protection

 Windows 7: System Security Review

 Windows 7: System Security Protection

 Windows 7 System Recovery

 Windows 7 Forefront Client Security

 Norton Power Eraser - Anti-Virus Scan Tool

 McAfee Virus and Malware Protection Tools

 Spybot - Spyware Blocker, Detection and Removal

 Keeping Firefox Secure

 Keeping IE (Internet Explorer) Secure

 Malware (Adware, Spyware, Trojan, Worm, and Virus)

 HijackThis - Browser Hijacker Diagnosis Tool

 IE Add-on Program Listing and Removal

 "Conduit Search" - Malware Detection and Removal

 "Tube Dimmer", "Scorpion Saver" or "Adpeak" Malware

 Malware Manual Removal Experience

 Vundo (VirtuMonde/VirtuMundo) - vtsts.dll Removal

 Trojan and Malware "Puper" Description and Removal

 VSToolbar (VSAdd-in.dll) - Description and Removal

 PWS (Password Stealer) Trojan Infection Removal

MS08-001 Vulnerability on Windows Systems

 MS08-001 - Vulnerability in TCP/IP

 IP Multicast and IP Address Range

 "netsh" Commands for Interface IP

224.0.0.1 - The All Hosts Multicast Group

 MulticastListener.java - A Simple Multicast Listener Program

 All Hosts Multicast Group, 224.0.0.1, on Vista Systems

 MS08-001 Vulnerability Explanation by Microsoft

 Antivirus System PRO

 References

 PDF Printing Version

Dr. Herong Yang, updated in 2013
224.0.0.1 - The All Hosts Multicast Group