Known Issues for Managing IPsec, Multicast, and ICMP Settings

Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2

Review the following known issues before you manage Internet Protocol (IPsec), multicast, and Internet Control Message Protocol (ICMP) settings.

  • Your computer might not be able to connect to multicast streams if you have Windows Firewall enabled. For more information about this issue, see article ID 883831 on the Microsoft Web site ( The article describes why Windows Firewall might prevent you from using Windows Media Player to connect to multicast and UDP streams and how you can configure Windows Firewall to overcome the problem.

  • You might experience problems with ICMP traffic if you also use IPsec to secure traffic. For more information, see article ID 889527 on the Microsoft Web site ( This article describes why you might have problems with ICMP traffic when you use IPsec to secure traffic and it provides information about how you can overcome the problem.

  • The Ping Command Times Out.