path: root/extensions/
diff options
authorHenrik Nordstrom <>2004-01-22 15:04:24 +0000
committerHarald Welte <>2004-01-22 15:04:24 +0000
commitc2794131b445ebccba184066af6d3fb2f38d1f38 (patch)
treea24f57a9be5a8364b53dfa102705d270f36b440a /extensions/
parent0113fe75ff05e09e6f3d251534d9ae32e9aa717c (diff)
split manpages into per-extension manpage snippet (Henrik Nordstrom)
add lots of missing manpage snippets (Harald Welte)
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1 files changed, 27 insertions, 0 deletions
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+This target provides userspace logging of matching packets. When this
+target is set for a rule, the Linux kernel will multicast this packet
+through a
+.IR netlink
+socket. One or more userspace processes may then subscribe to various
+multicast groups and receive the packets.
+Like LOG, this is a "non-terminating target", i.e. rule traversal
+continues at the next rule.
+.BI "--ulog-nlgroup " "nlgroup"
+This specifies the netlink group (1-32) to which the packet is sent.
+Default value is 1.
+.BI "--ulog-prefix " "prefix"
+Prefix log messages with the specified prefix; up to 32 characters
+long, and useful for distinguishing messages in the logs.
+.BI "--ulog-cprange " "size"
+Number of bytes to be copied to userspace. A value of 0 always copies
+the entire packet, regardless of its size. Default is 0.
+.BI "--ulog-qthreshold " "size"
+Number of packet to queue inside kernel. Setting this value to, e.g. 10
+accumulates ten packets inside the kernel and transmits them as one
+netlink multipart message to userspace. Default is 1 (for backwards