Dell S3100 EMC Command Line Reference Guide for the Series 9.14.2.2 - Page 338

This mechanism copies all incoming or outgoing packets on one port and forwards (mirrors) them to another port. The source port is the monitored port (MD) and the destination port is the monitoring port (MG). permit tcp (for IPv6 ACLs) Configure a filter to pass TCP packets that match the filter criteria. Syntax permit tcp {source address mask | any | host ipv6-address} [operator port [port]] {destination address | any | host ipv6-address} [bit] [operator port [port]] [ttl operator] [count [byte]] [log [interval minutes] [threshold-inmsgs [count]] [monitor] 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 permit tcp {source address mask | any | host ipv6-address} {destination address | any | host ipv6-address} command. Parameters source address mask Enter a network mask in /prefix format (/x). any Enter the keyword any to specify that all routes are subject to the filter. host ipv6-address Enter the keyword host then the IP address to specify a host IP address. destination address Enter the IPv6 address of the network or host to which the packets are sent. 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 parameter) port port Enter the application layer port number. Enter two port numbers if you are using the range logical operand. The range is from 0 to 65535. The following list includes some common TCP port numbers: • 23 = Telnet • 20 and 21 = FTP • 25 = SMTP 338 Access Control Lists (ACL)