D-Link DI-308 - Manual (Page 61)

DI-308 ISDN Remote Router
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State – This is used to define the routing decision applied to the packet. The
three routing decisions are described:
1. Forward – This allows the routing of the packet, if it has met the criteria of
the corresponding filter.
2. Drop – This drops (doesn’t allow routing for) a specific packet that has met
the criteria of the corresponding filter.
3. Disable – This does not apply the IP filter.
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Interface – This applies the filter to a specific interface, LAN or one of the ISDN
interfaces.
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Protocol Type – This is a protocol identifier, as assigned by the Internet
Assigned Numbers Authority (IANA). The values of this identifier are described
in RFC-1700. This router supports the following:
1 - This is Internet Control Message (ICMP), defined in RFC 792.
6 - This is Transmission Control (TCP), defined in RFC 793.
17 - This is User Datagram (UDP), defined in RFC 798.
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Src IP – This is the source address in the IP header of this packet.
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Src Netmask – This mask is bit-wise AND’d with the source IP address and bit-
wise AND’d with the IP address of the incoming interface. The two results are
then compared.
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Src Port – This is the source port, in the TCP or UDP header, of the packet.
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Src Port Operation – This comparison operation is applied to the source port
(the Src Port parameter) value, of the TCP or UDP header.
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Dst IP – This is the destination address in the IP header of the packet.
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Dst Netmask – This mask is bit-wise AND’d with the destination IP address and
bit-wise AND’d with the IP address of the incoming interface. The two results are
then compared.
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Dst Port – This is the destination port, in the TCP or UDP header, of the packet.
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Dst Port Operation – This comparison operation is applied to the destination
port (the Dst Port parameter) value, of the TCP or UDP header.
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ICMP Type – This is the type field, in the ICMP header, used to identify a
particular ICMP message.
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ICMP Code – This is the code field, in the ICMP header, used to further specify
the ICMP type.
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TCP Flag – This is a hex number, representing the six flag bits in the TCP
header. The value range is from 0 to 3F.