Allied Telesis AT-S94 - Manual (Page 83)

Configuring Device Security
Defining Access Control
Page 83
• Destination
– IPv4 Address — Matches the destination port IPv4 address to which packets are addressed to the ACE.
– Mask — Defines the destination IP address wildcard mask. Wildcard masks specify which bits are used
and which bits are ignored. A wild card mask of 255.255.255.255 indicates that no bit is important. A
wildcard of 0.0.0.0 indicates that all the bits are important.
• Flag Set — Sets the indicated TCP flag that can be triggered. The possible values are:
– Urg, Ack, Psh, Rst, Syn, and Fin.
The indicated value setting is represented by one of the following:
– 1 — Flag is set.
– 0 — Flag is disabled.
– x — Don’t care.
• ICMP Type — Filters packets by ICMP message type. The field values are 0-255.
• ICMP Code — Indicates and ICMP message code for filtering ICMP packets. ICMP packets that are filtered
by ICMP message type can also be filtered by the ICMP message code.
• IGMP Type — Filters packets by IGMP message or message types.
• DSCP — Matches the packets DSCP value.
• IP Prec. — Matches the packet IP Precedence value to the ACE. Either the DSCP value or the IP
Precedence value is used to match packets to ACLs. The possible field range is 0-7.
• Action — Indicates the action assigned to the packet matching the ACL. Packets are forwarded or dropped.
In addition, the port can be shut down, a trap can be sent to the network administrator, or packet is assigned
rate limiting restrictions for forwarding. The options are as follows:
– Permit — Forwards packets which meet the ACL criteria.
– Deny — Drops packets which meet the ACL criteria.
– Shutdown — Drops packet that meets the ACL criteria, and disables the port to which the packet was
addressed. Ports are reactivated from the Port Management Page.
• Delete — To remove an ACE, click the ACE’s checkbox and click the Delete button.