Technical information

ADC Telecommunications, Inc.
90 CHAPTER 2: CUDA 12000 BASE SYSTEM COMMANDS
dest-port {any |
<number>}
Optional argument, specifying the destination TCP or UDP port number
to match. Specify one of the following values:
■ any – Match any destination port.
■ <number> – Match a destination port number. The range is 0 to
65536 where a value of 65536 (the default) matches any value in the
TCP or UDP source port field. Specifying the 65536 value is the same
as specifying the any argument.
Note that this argument applies to TCP and UDP filters only.
tcp-flag {urgent |
ack | push | reset |
syn | fin}
Optional argument, specifying the value of the TCP flags, which must
always be a subset of the TCP flag mask. There is no default (no flags).
The options are:
■ urgent – The TCP segment is marked urgent.
■ ack – The acknowledgement number field in the TCP field segment is
significant.
■ push – The TCP software must push all the data sent so far through
the connection to the receiving application.
■ reset – The connection is reset.
■ syn – The sequence numbers are resynchronized, marking the
beginning of a connection.
■ fin – The transmitting CPE device has no more data to transmit.
The TCP flags must always be a subset of the TCP flag mask in order for
the packet header to be matched. For example to match all packets
where the urgent bit is set, but that are not either syn or fin, the flag
values would be “urgent” and the mask would be:
urgent, syn, fin
tcp-flag-mask
{urgent | ack | push |
reset | syn | fin}
Optional argument, specifying the flag of interest in the TCP header for
the packet to match. There is no default (no mask). The options are:
■ urgent
■ ack
■ push
■ reset
■ syn
■ fin
See the description of the tcp-flag argument for more information on
these flags.