5: Monitoring & Filtering
Viewing IPv4 filters
To view a list of active IPV4 traffic filters, open the Traffic > IPV4 Filters page. By default, commonly used filters are
defined.
The following information is presented for each filter:
z Filter name: Unique name assigned to the filter.
z IP source: Indicates the source address assigned to the filter. The filter will only process packets received from
this address. The address is specified in dotted decimal notation.
NOTE: Filtering source or destination IP address assigned by Dynamic Host Control Protocol (DHCP) can cause
problems. You should ensure that all IP addresses specified in a filter are static or reserved. Otherwise you must have to
manually update your filter every time the addresses change.
z IP destination: Indicates the destination address assigned to the filter. The filter will only process packet being
sent to this address. The address is specified in dotted decimal notation.
NOTE: Filtering source or destination IP address assigned by Dynamic Host Control Protocol (DHCP) can cause
problems. You should ensure that all IP addresses specified in a filter are static or reserved. Otherwise you must have to
manually update your filter every time the addresses change.
z Protocol: Identifies the protocol type that this filter will process. Other protocol types are ignored. Common
protocol are TCP (6),UDP (17) and ICMP (1)
z TCP is used by HTTP, FTP, Telnet, SMTP,
z UDP is used by DNS, SNMP, RIP,
z ICMP is used by Ping,
z Src port: Identifies the source port that will be used to match this rule. This setting is only valid when the protocol
field is set to TCP (6) or UDP (17).
z Dst port: Identifies the destination port that will be used to match this rule. This setting is only valid when the
protocol field is set to TCP (6) or UDP (17).
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