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̈ Chapter 8: Firewall LANCOM Reference Manual LCOS 3.50
157
Firewall
The table contains the following elements:
Element Element meaning
Src addr. Source address of the connection
Dst addr. Destination address of the connection
Protocol Used protocol (TCP/UDP etc.). The protocol is decimally indicated.
Src port Source port of the connection. The port is only indicated with port-related
protocols (TCP/UDP) or protocols, which own a comparable field (ICMP/
GRE).
Dst port Destination port of the connection (with UDP connections, this one is occu-
pied only with the first answer).
Timeout Each entry ages out with the time of this table, thus the table does not over-
flow with "died" connections.
Flags In the flags the condition of the connection and further (internal) informa-
tion are stored in a bit field.(→page 158)
As conditions the following values are possible: new, establish, open,
closing, closed, rejected (corresponding to the TCP flags: SYN, SYN ACK,
ACK, FIN, FIN ACK and RST).
UDP connections know the conditions new, open and closing (the last one
only, if the UDP connection is linked with a condition-afflicted control path.
This is e.g. the case with protocol H.323.).
Src route Name of the remote station, over which the first packet has been received.
Dst route Name of the remote station, where the first packet will be sent to.
Filter rule Name of the rule, which has generated the entry (determines also the
actions to be executed), when a suitable packet is received.