ZyXEL VMG3927-B50B User Guide - Page 196
Access Control: Add/Edit
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Chapter 16 Firewall The following table describes the labels in this screen. Table 80 Access Control: Add/Edit LABEL DESCRIPTION Filter Name Enter a descriptive name of up to 16 alphanumeric characters, not including spaces, underscores, and dashes. Order Select Source Device Source IP Address Select Destination Device Destination IP Address IP Type Select Service You must enter the filter name to add an ACL rule. This field is read-only if you are editing the ACL rule. Select the order of the ACL rule. Select the source device to which the ACL rule applies. If you select Specific IP Address, enter the source IP address in the field below. Enter the source IP address. Select the destination device to which the ACL rule applies. If you select Specific IP Address, enter the destiniation IP address in the field below. Enter the destination IP address. Select whether your IP type is IPv4 or IPv6. Select the transport layer protocol that defines your customized port from the drop-down list box. Protocol If you want to configure a customized protocol, select Specific Service. This field is displayed only when you select Specific Protocol in Select Protocol. Custom Source Port Custom Destination Port Policy Direction Enable Rate Limit Choose the IP port (TCP/UDP, TCP, UDP, ICMP, or ICMPv6) that defines your customized port from the drop-down list box. This field is displayed only when you select Specific Protocol in Select Protocol. Enter a single port number or the range of port numbers of the source. This field is displayed only when you select Specific Protocol in Select Protocol. Enter a single port number or the range of port numbers of the destination. Use the drop-down list box to select whether to discard (DROP), deny and send an ICMP destination-unreachable message to the sender of (REJECT) or allow the passage of (ACCEPT) packets that match this rule. Use the drop-down list box to select the direction of traffic to which this rule applies. Select this check box to set a limit on the upstream/downstream transmission rate for the specified protocol. Scheduler Rules Apply Cancel Specify how many packets per minute or second the transmission rate is. Select a schedule rule for this ACL rule form the drop-down list box. You can configure a new schedule rule by click Add New Rule. This will bring you to the Security > Scheduler Rules screen. Click Apply to save your changes. Click Cancel to exit this screen without saving. 16.5 DoS DoS (Denial of Service) attacks can flood your Internet connection with invalid packets and connection requests, using so much bandwidth and so many resources that Internet access becomes unavailable. VMG4927-B50A / VMG9827-B50A / VMG3927-B50B User's Guide 196
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