3Com 2924-SFP User Manual page 71

The IP Based ACL Modify Page contains the following fields:
Selection ACL — Selects the ACL to be modified.
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Modify Rule
Priority — Defines the ACL priority. ACLs are checked on the first fit
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basis. The ACL priority defines the ACL order in the ACL list.
Protocol — Indicates the protocol in the ACE to which the packet is
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matched.
Select from List — Selects a protocol from a list on which ACE can
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be based.
Protocol ID — Adds user-defined protocols by which packets are
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matched to the ACE. Each protocol has a specific protocol number
which is unique. The possible field range is 0-255.
Source Port — Enables creating an ACL based on a specific protocol.
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Any — Enables creating an ACL based on any protocol.
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Destination Port — Indicates the destination port that is matched
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packets. Enabled only when TCP or UDP are selected in the Protocol
list.
Any — Enables creating an ACL Based on any protocol.
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TCP Flags — If checked, enables configuration of TCP flags matched
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to the packet. The possible fields are:
Urg — Urgent pointer field significant. The urgent pointer points to
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the sequence number of the octet following the urgent data.
Ack — Acknowledgement field significant. The acknowledgement
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field is the byte number of the next byte that the sender expects to
receive from the receiver.
Psh — Push (send) the data as soon as possible, without buffering.
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This is used for interactive traffic.
Rst — Reset the connection. This invalidates the sequence numbers
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and aborts the session between the sender and receiver.
Syn — Synchronize Initial Sequence Numbers (ISNs). This is used to
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initialize a new connection.
Fin — Finish. This indicates there is no more data from the sender.
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This marks a normal closing of the session between the sender and
receiver.
Defining Access Control Lists 71