Dell Force10 TeraScale C Series, Справочное руководство

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Access Control Lists (ACL) | 227
• Use the
no deny tcp
{
source mask
|
any
|
host ip-address
} {
destination mask
|
any
|
host
ip-address
} command.
Parameters
source Enter the IP address of the network or host from which the packets were 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.
any
Enter the keyword
any
to specify that all routes are subject to the filter.
host ip-address
Enter the keyword
host
followed by the IP address to specify a host IP
address.
dscp
Enter this keyword to deny a packet based on DSCP value.
Range: 0-63
bit
Enter a flag or combination of bits:
ack:
acknowledgement field
fin
: finish (no more data from the user)
psh:
push function
rst:
reset the connection
syn:
synchronize sequence numbers
urg:
urgent field
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.
Range: 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 processed by the
filter.
byte
(OPTIONAL) Enter the keyword
byte
to count bytes processed by the filter.
log
(OPTIONAL, E-Series only) Enter the keyword
log
to enter ACL matches in
the log. Supported on Jumbo-enabled line cards only.
order
(OPTIONAL) Enter the keyword
order
to specify the QoS priority for the
ACL entry.
Range: 0-254 (where 0 is the highest priority and 254 is the lowest; lower
order numbers have a higher priority)
Default: If the order keyword is not used, the ACLs have the lowest order by
default (255).