Reference Guide

deny tcp
Configures a filter that drops Transmission Control Protocol (TCP) packets meeting the filter criteria.
Syntax
deny tcp [A.B.C.D | A.B.C.D/x | any | host ip-address [operator]] [[A.B.C.D
| A.B.C.D/x | any | host ip-address [operator]] [ack | fin | psh | rst |
syn | urg] [capture | dscp value | fragment]
Parameters
● A.B.C.D — Enter the IP address in A.B.C.D format.
● A.B.C.D/x — Enter the number of bits to match in A.B.C.D/x format.
● any — (Optional) Enter to subject all routes to the filter:
○ capture — (Optional) Capture packets the filter processes.
○ dscp value — (Optional) Deny a packet based on the DSCP values, from 0 to 63.
○ fragment — (Optional) Use ACLs to control packet fragments.
○ ack — (Optional) Set the bit as acknowledgement.
○ fin — (Optional) Set the bit as finish—no more data from sender.
○ psh — (Optional) Set the bit as push.
○ rst — (Optional) Set the bit as reset.
○ syn — (Optional) Set the bit as synchronize.
○ urg — (Optional) Set the bit set as urgent.
● operator — (Optional) Enter a logical operator to match the packets on the specified port number.
The following options are available:
○ eq — Equal to
○ gt — Greater than
○ lt — Lesser than
○ neq — Not equal to
○ range — Range of ports, including the specified port numbers.
● host ip-address — (Optional) Enter the keyword and the IP address to use a host address only.
Default Not configured
Command Mode IPV4-ACL
Usage
Information
The no version of this command removes the filter.
Example
OS10(config)# ip access-list testflow
OS10(conf-ipv4-acl)# deny tcp any any capture session 1
Supported
Releases
10.2.0E or later
deny tcp (IPv6)
Configures a filter that drops TCP IPv6 packets meeting the filter criteria.
Syntax
deny tcp [A::B | A::B/x | any | host ipv6-address [operator]] [A::B | A:B/x
| any | host ipv6-address [operator]] [ack | fin | psh | rst | syn | urg]
[capture | dscp value | fragment]
Parameters
● A::B — Enter the IPv6 address in hexadecimal format separated by colons.
● A::B/x — Enter the number of bits to match to the IPv6 address.
● any — (Optional) Set all routes which are subject to the filter:
○ capture — (Optional) Capture packets the filter processes.
○ dscp value — (Optional) Deny a packet based on the DSCP values, from 0 to 63.
○ fragment — (Optional) Use ACLs to control packet fragments.
● operator — (Optional) Enter a logical operator to match the packets on the specified port number.
The following options are available:
Access Control Lists 579