udp

Purpose

The udp element captures all UDP packets. This element can be prepended to port-related elements.

Note: When not prepended to other elements, the udp element is the equivalent of ip proto udp.

Syntax

udp

udp element

Parameters

element

String. A port-related filter string element that should be restricted to saving only UDP packets. This can be the following:

dst port - Capture all UDP packets destined for a specific port.
port - Captures all UDP packets originating from or destined for a specific port.
src port - Capture all UDP packets originating from a specific port.

Example 1

The following filter string captures all UDP packets:

udp

Example 2

The following filter string captures all UDP packets destined for port 80:

udp dst port 80