User Manual

S350 Series 24-Port (PoE+) and 48-Port Gigabit Ethernet Smart Switches
Manage Device Security User Manual286
• Dst. In the Dst field, enter a destination IP address, using dotted-decimal notation, to
be compared to a packet’s destination IP address as a match criterion for the selected
IP ACL rule:
- If you select the IP Address radio button, enter an IP address with a relevant
wildcard mask to apply this criteria. If this field is left empty, it means any.
- If you select the Host radio button, the wildcard mask is configured as 0.0.0.0. If
this field is left empty, it means any.
The wildcard mask determines which bits are used and which bits are ignored. A
wildcard mask of 0.0.0.0 indicates that none of the bits are important. A wildcard of
255.255.255.255 indicates that all of the bits are important.
• Dst L4. The options are available only when the protocol is set to TCP or UDP. Use the
destination L4 port option to specify relevant matching conditions for L4 port numbers
in the extended ACL rule.
You can select either the Port radio button or the Range radio button:
- Port. If you select the Port radio button, you can either enter the port number
yourself or select one of the following protocols from the menu.
• The destination IP TCP port protocols are Domain, Echo, FTP, FTP data,
www-http, SMTP, Telnet, POP2, POP3, and bgp.
• The destination IP UDP port protocols are Domain, Echo, SNMP, NTP, RIP,
Time, Who, and TFTP.
Each of these values translates into its equivalent port number, which is used as
both the start and end of the port range.
Select Other from the menu to enter a port number. If you select Other from the
menu but leave the field blank, it means any.
The relevant matching conditions for L4 port numbers are as follows:
• Equal. The IP ACL rule matches only if the Layer 4 destination port number is
equal to the specified port number or port protocol.
• Less Than. The IP ACL rule matches if the Layer 4 destination port number is
less than the specified port number.
• Greater Than. The IP ACL rule matches if the Layer 4 destination port
number is greater than the specified port number.
• Not Equal. The IP ACL rule matches only if the Layer 4 destination port
number is not equal to the specified port number or port protocol.
- Range. If you select the Range radio button, the IP ACL rule matches only if the
Layer 4 destination port number is within the specified port range. The starting
port, ending port, and all ports in between are a part of the Layer 4 port range.
The Start Port and End Port fields identify the first and last ports that are part of
the port range. They values can range from 0 to 65535.