path: root/extensions/
diff options
authorJan Engelhardt <>2008-02-14 03:02:55 +0100
committerPatrick McHardy <>2008-04-14 09:09:49 +0200
commite24815d8a1b2755182fe983582a56fcc47153804 (patch)
tree74521e49f0274dd0ff7831d9b71d25ef020820b5 /extensions/
parent23545c2a7a31c68c1e49c7c901b632c2f1c59968 (diff)
Combine ipt and ip6t manpages
Combine ipt and ip6t manpages
Diffstat (limited to 'extensions/')
1 files changed, 0 insertions, 45 deletions
diff --git a/extensions/ b/extensions/
deleted file mode 100644
index cfafc9e0..00000000
--- a/extensions/
+++ /dev/null
@@ -1,45 +0,0 @@
-These extensions can be used if `--protocol tcp' is specified. It
-provides the following options:
-.BR "--source-port " "[!] \fIport\fP[:\fIport\fP]"
-Source port or port range specification. This can either be a service
-name or a port number. An inclusive range can also be specified,
-using the format
-.IR port : port .
-If the first port is omitted, "0" is assumed; if the last is omitted,
-"65535" is assumed.
-If the second port greater then the first they will be swapped.
-The flag
-.B --sport
-is a convenient alias for this option.
-.BR "--destination-port " "[!] \fIport\fP[:\fIport\fP]"
-Destination port or port range specification. The flag
-.B --dport
-is a convenient alias for this option.
-.BR "--tcp-flags " "[!] \fImask\fP \fIcomp\fP"
-Match when the TCP flags are as specified. The first argument is the
-flags which we should examine, written as a comma-separated list, and
-the second argument is a comma-separated list of flags which must be
-set. Flags are:
-Hence the command
- iptables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST SYN
-will only match packets with the SYN flag set, and the ACK, FIN and
-RST flags unset.
-.B "[!] --syn"
-Only match TCP packets with the SYN bit set and the ACK,RST and FIN bits
-cleared. Such packets are used to request TCP connection initiation;
-for example, blocking such packets coming in an interface will prevent
-incoming TCP connections, but outgoing TCP connections will be
-It is equivalent to \fB--tcp-flags SYN,RST,ACK,FIN SYN\fP.
-If the "!" flag precedes the "--syn", the sense of the
-option is inverted.
-.BR "--tcp-option " "[!] \fInumber\fP"
-Match if TCP option set.