Microsoft ISA / TMG NLB mulicast unicast explained

Unicast Mode

NLB can be configured to work in either unicast or multicast mode. These modes determine how the cluster assigns itself MAC addresses. The upstream router needs to send packets destined for the cluster based on the MAC address advertised by the cluster. The cluster MAC address needs to be the same for all virtual IP addresses because all packets destined for a virtual IP address must be delivered to all members of the NLB array.

change RDP port on a windows 2003 server

To change the default port for all new connections created on the Terminal Server: 1.Run Regedit and go to this key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp

Find the “PortNumber” subkey and notice the value of 00000D3D, hex for (3389). Modify the port number in Hex and save the new value. You can now connect to the new port by using the “old” Windows 2000 Terminal Server client. A better option is to use the RDP client found in Windows XP, or even better, the newer Windows Server 2003 SP1 RDP 5.2 client.

Cisco ASA Multiple Context mode considerations

The Cisco ASA supports firewall Multiple Contexts, also called Firewall Multimode, but there are pros and cons to be considered before implementing this configuration.

Multiple Context Mode can be viewed as having multiple separate (virtual) firewalls on the same hardware. Each context is its own security entity with its own security policy and interfaces. While most features are supported while using Multiple Contexts, some are not.

Category Archives: Networking

Microsoft ISA / TMG NLB mulicast unicast explained

change RDP port on a windows 2003 server

Cisco ASA Multiple Context mode considerations

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