Allied Telesis AT-S94 Uživatelská příručka stáhnout pdf (Strana 84)

Page 84

Allied Telesis

AT-S94 Management Software Web Browser Interface User’s Guide

• 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.

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Allied Telesis AT-S94 Uživatelská příručka Strana 84