Developers Guide

Use the established flag to match only ACK and RST flags of established TCP
session.
You cannot use established along with the other control flags
While using the established flag in an ACL rule, all the other TCP control flags
are masked, to avoid redundant TCP control flags configuration in a single rule.
When you use any TCP control flag in an ACL rule, established is masked and
other control flags are available.
operator (OPTIONAL) Enter one of the following logical operand:
● eq = equal to
● neq = not equal to
● gt = greater than
● lt = less than
● range = inclusive range of ports (you must specify two ports for the port
command)
port port
Enter the application layer port number. Enter two port numbers if using the range
logical operand. The range is from 0 to 65535.
The following list includes some common TCP port numbers:
● 23 = Telnet
● 20 and 21 = FTP
● 25 = SMTP
● 169 = SNMP
destination Enter the IP address of the network or host to which the packets are sent.
mask Enter a network mask in /prefix format (/x) or A.B.C.D. The mask, when specified
in A.B.C.D format, may be either contiguous or non-contiguous.
count (OPTIONAL) Enter the keyword count to count packets the filter processes.
byte (OPTIONAL) Enter the keyword byte to count bytes the filter processes.
order (OPTIONAL) Enter the keyword order to specify the QoS priority for the ACL
entry. The range is from 0 to 254 (where 0 is the highest priority and 254 is the
lowest; lower-order numbers have a higher priority) If you did not use the keyword
order, the ACLs have the lowest order by default (255).
fragments Enter the keyword fragments to use ACLs to control packet fragments.
monitor (OPTIONAL) Enter the keyword monitor to describe the traffic that you want to
monitor and the ACL in which you are creating the rule is applied to the monitored
interface. For more information, see Flow-based Monitoring in the Port Monitoring
section in the Dell EMC Networking OS Configuration Guide.
no-drop Enter the keywords no-drop to match only the forwarded packets.
Defaults Not configured.
Command Modes CONFIGURATION-EXTENDED-ACCESS-LIST
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.12(0.0) Introduced the ttl parameter. Removed the session–ID option from the monitor
parameter.
9.11(2.0P0) Added the established parameter on the on the S6000, S6000–ON, S6100–
ON, Z9100–ON.
9.11(0.0) Added support for session–ID to the monitor parameter.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
Access Control Lists (ACL) 197