Connectivity Guide

Supported Releases 10.2.0E or later
deny tcp
Congures a lter that drops Transmission Control Protocol (TCP) packets meeting the lter 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 IPv4 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 lter:
– capture — (Optional) Capture packets the lter 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 nish—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 specied 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 specied port numbers.
• host ip-address — (Optional) Enter the keyword and the IPv4 address to use a host address only.
Default
Not congured
Command Mode IPV4-ACL
Usage Information The no version of this command removes the lter.
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)
Congures a lter that drops TCP IPv6 packets meeting the lter 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]
Access Control Lists 715