Users Guide

8.2.1.0 Introduced on the E-Series TeraScale.
7.8.1.0 Introduced on the C-Series.
7.4.1.0 Introduced on the E-Series TeraScale Added the monitor option.
deny tcp
Congure a lter that drops TCP packets that match the lter criteria.
Syntax
deny tcp {source address mask | any | host ipv6-address} [operator port [port]]
{destination address | any | host ipv6-address} [bit] [operator port [port]]
[count [byte]] | [log] [monitor]
To remove this lter, you have two choices:
• Use the no seq sequence-number command syntax if you know the lter’s sequence number
•
Use the no deny tcp {source address mask | any | host ipv6-address}
{destination address | any | host ipv6-address} command
Parameters
source address Enter the IPv6 address of the network or host from which the packets were sent in the
x:x:x:x::x format followed by the prex length in the /x format. The range is /0 to /128.
The :: notation species successive hexadecimal elds of zero.
mask Enter a network mask in /prex format (/x).
any Enter the keyword any to specify that all routes are subject to the lter.
host ipv6-address Enter the keyword host followed by the IPv6 address of the host in the x:x:x:x::x format.
The :: notation species successive hexadecimal elds of zero.
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
parameter).
port port
Enter the application layer port number. Enter two port numbers if using the range logical
operand. The range is 0 to 65535.
The following list includes some common TCP port numbers:
• 23 = Telnet
• 20 and 21 = FTP
• 25 = SMTP
• 169 = SNMP
226 Access Control Lists (ACL)