1*a71a9546SAutomerger Merge WorkerThis target provides logging of matching packets. When this target is 2*a71a9546SAutomerger Merge Workerset for a rule, the Linux kernel will pass the packet to the loaded 3*a71a9546SAutomerger Merge Workerlogging backend to log the packet. This is usually used in combination 4*a71a9546SAutomerger Merge Workerwith nfnetlink_log as logging backend, which will multicast the packet 5*a71a9546SAutomerger Merge Workerthrough a 6*a71a9546SAutomerger Merge Worker.IR netlink 7*a71a9546SAutomerger Merge Workersocket to the specified multicast group. One or more userspace processes 8*a71a9546SAutomerger Merge Workermay subscribe to the group to receive the packets. Like LOG, this is a 9*a71a9546SAutomerger Merge Workernon-terminating target, i.e. rule traversal continues at the next rule. 10*a71a9546SAutomerger Merge Worker.TP 11*a71a9546SAutomerger Merge Worker\fB\-\-nflog\-group\fP \fInlgroup\fP 12*a71a9546SAutomerger Merge WorkerThe netlink group (0 - 2^16\-1) to which packets are (only applicable for 13*a71a9546SAutomerger Merge Workernfnetlink_log). The default value is 0. 14*a71a9546SAutomerger Merge Worker.TP 15*a71a9546SAutomerger Merge Worker\fB\-\-nflog\-prefix\fP \fIprefix\fP 16*a71a9546SAutomerger Merge WorkerA prefix string to include in the log message, up to 64 characters 17*a71a9546SAutomerger Merge Workerlong, useful for distinguishing messages in the logs. 18*a71a9546SAutomerger Merge Worker.TP 19*a71a9546SAutomerger Merge Worker\fB\-\-nflog\-range\fP \fIsize\fP 20*a71a9546SAutomerger Merge WorkerThis option has never worked, use --nflog-size instead 21*a71a9546SAutomerger Merge Worker.TP 22*a71a9546SAutomerger Merge Worker\fB\-\-nflog\-size\fP \fIsize\fP 23*a71a9546SAutomerger Merge WorkerThe number of bytes to be copied to userspace (only applicable for 24*a71a9546SAutomerger Merge Workernfnetlink_log). nfnetlink_log instances may specify their own 25*a71a9546SAutomerger Merge Workerrange, this option overrides it. 26*a71a9546SAutomerger Merge Worker.TP 27*a71a9546SAutomerger Merge Worker\fB\-\-nflog\-threshold\fP \fIsize\fP 28*a71a9546SAutomerger Merge WorkerNumber of packets to queue inside the kernel before sending them 29*a71a9546SAutomerger Merge Workerto userspace (only applicable for nfnetlink_log). Higher values 30*a71a9546SAutomerger Merge Workerresult in less overhead per packet, but increase delay until the 31*a71a9546SAutomerger Merge Workerpackets reach userspace. The default value is 1. 32*a71a9546SAutomerger Merge Worker.BR 33