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DHCP Option Filtering
Beginning with Firmware Version 7.7, support for DHCP option filtering is provided via the filterset set-
tings.
set dhcp filterset name " string " rule n
type [ dhcp-option | hw-address | requested-option ]
Specifies a DHCP filterset named string as one of three possible types:
The rule can either specify an option and option contents, dhcp-option; a client hardware address
range, hw-address; or an option the client is requesting, requested-option. For hw-address, you will
need to enter start-address and end-address values; for the others a dhcp-option parameter must
be set.
By default a rule is of type dhcp-option, for backwards compatibility.
set dhcp filterset name " string " rule n dhcp-option [ 0... 255 ]
Creates a DHCP filterset named string , for example "settopbox," with rule number n .
Up to two filtersets can be added. Your Gateway supports a single LAN DHCP server instance, but an
additional filterset is available for use when bridging, to block undesired DHCP traffic. Up to 8 rules can
be created in the filterset, which are evaluated in order.
dhcp-option determines which DHCP option should be compared. A typical value would be to use
option 60 data for comparison, but allowing this value to be configured permits more flexibility.
set dhcp filterset name "settopbox" rule 1 type dhcp-option
set dhcp filterset name " string " rule n match-action
[ pass | discard | continue ]
Assigns a match action to the filterset. If set to pass the match-pool address is shown.
set dhcp filterset name " string " rule n absent-action
[ pass | discard | continue ]
Assigns an absent action to the filterset. If set to pass the absent-pool address is shown.
set dhcp filterset name " string " rule n match-option-group " option_group *"
Assigns the option group named option_group to match.
set dhcp filterset name " string " rule n match-str " match_string *"
Assigns a match string to the filterset. The match-str string will be compared against the DHCP DIS-
COVER option data. This string can contain multiple "*" and "?" wildcard substitutions.
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