Netgear GS752TXS Technical Information download pdf (Page 238)

238 | Chapter 7: Managing Device Security

GS752TXS Smart Switch Software Administration Manual

• Destination L4 Port Number: If the destination L4 keyword is Other, enter a

user-defined Port ID by which packets are matched to the rule.

• Service Type. Choose one of the Service Type match conditions for the extended IP

ACL rule. The possible values are IP DSCP, IP precedence, and IP TOS, which are

alternative ways of specifying a match criterion for the same Service Type field in the

IP header, however each uses a different user notation. After you select the service

type, specify the value associated with the type.

• IP DSCP: Specify the IP DiffServ Code Point (DSCP) value. The DSCP is defined

as the high-order six bits of the Service Type octet in the IP header. Select an IP

DSCP value from the menu. To specify a numeric value in the available field,

select Other from the menu and type an integer from 0 to 63 in the field.

• IP Precedence: The IP Precedence field in a packet is defined as the high-order

three bits of the Service Type octet in the IP header. This is an optional

configuration. Enter an integer from 0 to 7.

• IP TOS Bits: Matches on the Type of Service bits in the IP header when checked.

In the first TOS field, specify the two-digit hexadecimal TOS number. The second

field is for the TOS Mask, which specifies the bit positions that are used for

comparison against the IP TOS field in a packet. The TOS Mask value is a

two-digit hexadecimal number from 00 to ff, representing an inverted (i.e.,

wildcard) mask. The zero-valued bits in the TOS Mask denote the bit positions in

the TOS Bits value that are used for comparison against the IP TOS field of a

packet. For example, to check for an IP TOS value having bits 7 and 5 set and bit

1 clear, where bit 7 is most significant, use a TOS Bits value of a0 and a TOS

Mask of 00.

3. To delete an IP ACL rule, select the check box associated with the rule, and then click

Delete.

4. Click Cancel to cancel the configuration on the screen and reset the data on the screen to

the latest value of the switch.

5. To modify an existing IP Extended ACL rule, click in the Rule ID field. The number is a

hyperlink to the Extended ACL Rule Configuration page.

6. If you modify the rule, click Apply to submit the changes to the switch.

IPv6 ACL

An IPv6 ACL consists of a set of rules which are matched sequentially against a packet.

When a packet meets the match criteria of a rule, the specified rule action (Permit/Deny) is

taken and the additional rules are not checked for a match. On this menu, the interfaces to

which an IP ACL applies must be specified, as well as whether it applies to inbound or

outbound traffic. Rules for the IP ACL are specified/created using the IP ACL Rule

Configuration menu.

To display the IPv6 ACL page, click Security  ACL, then click the Advanced  IPv6 ACL link.

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Netgear GS752TXS Technical Information Page 238