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Protecting Against Improper Use of Workgroup DHCP Servers
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| bet | 11/46 | | Sana | 21.03.2017 | | Hajmi | 353.5 Kb. | | #1052 |
When DHCP servers that do not belong to a domain (such as a member of a workgroup) start, the following occurs:
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The DHCP server broadcasts a DHCPINFORM message on the network. Any other DHCP server that receives this message responds with a DHCPACK message and provides the name of its domain.
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If a workgroup DHCP server detects another member DHCP server of a domain on the network, the workgroup DHCP server does not service requests.
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If the workgroup DHCP server detects the presence of another workgroup server, it ignores it.
Even when a workgroup server starts and is able to run—for example, because of the absence of a domain member server or workgroup server on the network—it continues to send DHCPINFORM messages every 60 minutes. If an authorized domain member DHCP server starts later, the workgroup server becomes unauthorized and stops servicing DHCP requests from clients.
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