Manual Chapter :
Global properties
Applies To:
Show Versions
BIG-IP AAM
- 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP APM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP Analytics
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP Link Controller
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP LTM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP PEM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP AFM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP DNS
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
BIG-IP ASM
- 17.1.1, 17.1.0, 17.0.0, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0
Global properties
You can configure three specific global properties for packet filtering.
Packet filter enabling
Before you can implement packet filtering on the BIG-IP® system, you must
enable the packet filter feature. You do this by changing the
Packet
Filtering
setting to Enabled
. The default setting for packet
filtering is Disabled
.Control of unhandled packets
Sometimes a packet does not match any of the criteria that you have specified in the packet
filter rules that you have created. For this reason, you must configure the
Unhandled
Packet Action
property, which specifies the action that the BIG-IP system should take
when the packet does not match packet filter rule criteria.Possible values for this setting are
Accept
,
Discard
, and Reject
. The default value is
Accept
.Changing the default value of the Unhandled Packet Action property can
produce unwanted consequences. Before changing this value to
Discard
or
Reject
, make sure that any traffic that you want the BIG-IP system to
accept meets the criteria specified in your packet filter rules.Other options
Using the Options property, you can configure two other options:
- Filter established connections
- When you enable (check) this option, the BIG-IP system filters all ingress packets, even if the packets are part of an existing connection. The default setting is disabled (unchecked). Note that checking this option does not typically enhance security, and can impact system performance.
- Send ICMP error on packet reject
- When you enable (check) this option, the system sends an ICMP type 3 (destination unreachable), code 13 (administratively prohibited) packet when an ingress packet is rejected. When you disable (clear) this option, the BIG-IP system sends an ICMP reject packet that is protocol-dependent. The default setting for this option is disabled (cleared).
