NoteHKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<interface-name>
| Data type | Range | Default value |
|---|---|---|
| REG_DWORD | 0 |
Specifies the UDP ports on which incoming IP datagrams are accepted on this interface when security filter is enabled. Security filtering is enabled when the value of EnableSecurityFilters is 1.
| Value | Meaning |
|---|---|
| (Blank value -- the entry appears in the registry, but there is no data in the value field.) | No datagrams are accepted. |
| 0 (or not in registry) | All datagrams are accepted. |
| Specific IP protocol numbers | Only datagrams arriving on these ports are accepted. |
To change the value of this entry, use Network and Dial-up Connections. Right-click Local Area Connection, click Properties, click Internet Protocol (TCP/IP), and then click the Properties button. In the bottom, right corner of the Internet Protocol (TCP/IP) Properties page, click the Advanced button, click the Options tab, click TCP/IP filtering, click Properties and then, just above the UDP Ports box, click Permit Only. This entry is associated with the values added to the UDP Ports list on this page.
Note
There is no defined or predictable response when the value of this entry includes both a zero and IP protocol numbers. Do not combine these values in this entry.
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