ICMP Message Type
Keywords
ICMP Message Type Name
source-route-failed Source route failed
time-exceeded All time exceeded
timestamp-reply Timestamp replies
timestamp-request Timestamp requests
traceroute Traceroute
ttl-exceeded TTL exceeded
unreachable All unreachables
deny tcp
Configure a filter that drops transmission control protocol (TCP) packets meeting the filter criteria.
C-Series, E-Series, S-Series, Z-Series
Syntax
deny tcp {source mask | any | host ip-address} [bit] [operator
port
[port]] {destination mask | any | host ip-address} [dscp]
[bit] [operator port [port]] [count [byte] | log] [order]
[monitor] [fragments]
To remove this filter, you have two choices:
• Use the no seq sequence-number command if you know the filter’s sequence
number.
• 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
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.
any Enter the keyword any to specify that all routes are subject to the
filter.
host
ip-address
Enter the keyword host and then enter the IP address to specify a
host IP address.
dscp Enter this keyword dscp to deny a packet based on the DSCP value.
The range is 0 to 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
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