D-Link DFL-1600 - Security Appliance, Руководство пользователя

Страница: 513 / 552

Default: ValidateLogBad
SecuRemoteUDP Compatibility
Allow IP data to contain eight bytes more than the UDP total length field specifies. Checkpoint
SecuRemote violates NAT-T drafts.
Default: Disabled
IP Option Sizes
Verifies the size of "IP options". These options are small blocks of information that may be added to
the end of each IP header. This function checks the size of well known option types and ensures that
no option exceeds the size limit stipulated by the IP header itself.
Default: ValidateLogBad
IP Option Source/Return
Indicates whether source routing options are to be permitted. These options allow the sender of the
packet to control how the packet is to be routed through each router and firewall. These constitute an
enormous security risk. NetDefendOS never obeys the source routes specified by these options,
regardless of this setting.
Default: DropLog
IP Options Timestamps
Time stamp options instruct each router and firewall on the packet's route to indicate at what time
the packet was forwarded along the route. These options do not occur in normal traffic. Time stamps
may also be used to "record" the route a packet has taken from sender to final destination.
NetDefendOS never enters information into these options, regardless of this setting.
Default: DropLog
IP router alert option
How to handle IP packets with contained route alert.
Default: ValidateLogBad
IP Options Other
All options other than those specified above.
Default: DropLog
Directed Broadcasts
Indicates whether NetDefendOS will forward packets which are directed to the broadcast address of
its directly connected networks. It is possible to achieve this functionality by adding lines to the
Rules section, but it is also included here for simplicity's sake. This form of validation is faster than
entries in the Rules section since it is more specialized.
Default: DropLog
13.1. IP Level Settings Chapter 13. Advanced Settings
513