Multi-Stream Analysis
137
weight User Datagram Protocol (UDP). Like TCP, UDP provides communications
through ports to applications but it doesn’t have any error recovery capability.
6.2.7. Fixed Offset Selection
Generic selection is the matching mode to be used when the Ethernet frames carry
uncommon protocols or if inspection beyond the UDP and TCP transport protocols is
Table 6.6: UDP Selection
Field Description
Source port match Enables selection by source UCP port in the current filter.
The value configured here is used to determine which frames
are allowed to pass through the filter and which ones are
blocked. The available configuration values for this field are:
• Ignore: The source port is ignored and not taken into
account for the purpose of the filter. No frame is selected
by the filter when Ignore has been configured.
• Range: All frames with a destination port in an specified
range are allowed to pass through the filter. The port range
is specified with the help of the Minimum source port and
Maximum source port fields.
Minimum source port This is the minimum 16-bit UDP source port allowed to pass
through the Source port match filter. The port is configured
and displayed in decimal format.
Maximum source port This is the maximum 16-bit UDP source port allowed to pass
through the Source port match filter. The port is configured
and displayed in decimal format.
Destination port
match
Enables selection by the 2-byte UDP protocol field in the cur-
rent filter. The value configured here is used to determine
which frames are allowed to pass through the filter and which
ones are blocked. The available configuration values for this
field are the same that for the Source address match field.
Minimum destination
port
This is the minimum 16-bit UDP destination port allowed to
pass through the Destination port selection filter. The port is
configured and displayed in decimal format.
Maximum destina-
tion port
This is the maximum 16-bit UDP destination port allowed to
pass through the Destination port selection filter. The port is
configured and displayed in decimal format.
To Next Page
Loading...