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Packet Filtering

To display: [Utility][Administrator][Network][TCP/IP Setting][Packet Filtering]

Restrict a reception of packets sent to the machine depending on the source address. This function also restricts sending depending on the destination address.

Setting

Description

[Log Settings]

Records a history of packets with receiving or sending denied by the packet filtering function.

  • [Log Settings]: Select whether to record packet filtering logs (default: [Disable]).

  • [Number of Lines]: Specify the number of logs to be written (default: [1000]). Tapping [Start] starts writing.

[Import]

Collectively imports multiple filters from a USB flash drive. This option is available to edit filters exported from the machine on the computer before importing them.

[Export]

Exports all the registered filters to a USB flash drive.

[TX/RX address out of range]

Select whether to allow sending or receiving a packet to which the registered filter is not applied (default: [Allow]).

To register a new filter, specify an unregistered number in the filter list, and select [Registration].

Setting

Description

[Address Type]

Select the address type for the target packet.

[Start Address]

Specify the range of addresses to be filtered.

  • If you select [IPv4] in [Address Type], specify the starting address of the IPv4 address range. You can specify the broadcast address or multicast address as needed.
    Format: "*.*.*.*"
    For "*", specify the value between 0 and 255.
    If necessary, you can specify the address range depending on the IPv4 address and prefix length. In this case, the address range that matches bits in the prefix part is targeted for filtering.
    Format: "*.*.*.*/@"
    For "*", specify the value between 0 and 255. For "@", specify the value between 1 and 31.

  • If you select [IPv6] in [Address Type], specify the address range depending on the IPv6 and prefix length. You can specify the multicast address as needed.
    Format: "****:****:****:****:****:****:****:****/@"
    For "*", specify a hexadecimal number. For "@", specify the value between 1 and 127.

  • If you select [MAC Address] in [Address Type], specify the MAC address. In this case, only a single address is targeted for filtering. You cannot specify the address range.
    Format: "**:**:**:**:**:**"
    For "*", specify a hexadecimal number.

[End Address]

When you select IPv4 in [Address Type], specify the ending address of the IPv4 address range to be filtered. If you skip [End Address], only the address specified in [Start Address] is targeted for filtering.

Format: "*.*.*.*"

For "*", specify the value between 0 and 255.

When you specify the prefix length of the IPv4 address in [Start Address], you cannot specify the ending address.

[Receive/Send]

Select the communication direction of the target packet.

  • [RX]: Restricts packets received by the machine depending on the source address.

  • [TX]: Restricts packets sent by the machine depending on the destination address.

If you select [MAC Address] in [Address Type], you cannot set to [TX].

[Allow/Denied]

Select whether to allow or reject a communication of the target packet.

Tips

  • To edit or delete a registered filter, specify the target one in the filter list, and select [Edit] or [Delete].