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doc: properly escape non-hyphens
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@@ -4,16 +4,16 @@ firewall based classifier.
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This target is to be used inside the \fBmangle\fP table.
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.TP
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\fB--addr\fP {\fBsrc\fP|\fBdst\fP}
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\fB\-\-addr\fP {\fBsrc\fP|\fBdst\fP}
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Select source or destination IP address as a basis for the mark.
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.TP
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\fB--and-mask\fP \fImask\fP
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\fB\-\-and\-mask\fP \fImask\fP
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Perform bitwise AND on the IP address and this bitmask.
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.TP
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\fB--or-mask\fP \fImask\fP
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\fB\-\-or\-mask\fP \fImask\fP
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Perform bitwise OR on the IP address and this bitmask.
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.TP
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\fB--shift\fP \fIvalue\fP
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\fB\-\-shift\fP \fIvalue\fP
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Shift addresses to the right by the given number of bits before taking it
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as a mark. (This is done before ANDing or ORing it.) This option is needed
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to select part of an IPv6 address, because marks are only 32 bits in size.
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@@ -34,16 +34,16 @@ tc filter add dev eth3 parent 1:0 protocol ip fw
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.PP
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Earlier we had many rules just like below:
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.IP
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iptables -t mangle -A POSTROUTING -o eth3 -d 192.168.5.2 -j MARK
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--set-mark 0x10502
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iptables \-t mangle \-A POSTROUTING \-o eth3 \-d 192.168.5.2 \-j MARK
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\-\-set\-mark 0x10502
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.IP
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iptables -t mangle -A POSTROUTING -o eth3 -d 192.168.5.3 -j MARK
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--set-mark 0x10503
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iptables \-t mangle \-A POSTROUTING \-o eth3 \-d 192.168.5.3 \-j MARK
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\-\-set\-mark 0x10503
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.PP
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Using IPMARK target we can replace all the mangle/mark rules with only one:
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.IP
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iptables -t mangle -A POSTROUTING -o eth3 -j IPMARK --addr dst
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--and-mask 0xffff --or-mask 0x10000
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iptables \-t mangle \-A POSTROUTING \-o eth3 \-j IPMARK \-\-addr dst
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\-\-and\-mask 0xffff \-\-or\-mask 0x10000
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.PP
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On the routers with hundreds of users there should be significant load
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decrease (e.g. twice).
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@@ -52,5 +52,5 @@ decrease (e.g. twice).
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2001:db8:45:1d:20d:93ff:fe9b:e443 and the resulting mark should be 0x93ff,
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then a right-shift of 16 is needed first:
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.IP
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-t mangle -A PREROUTING -s 2001:db8::/32 -j IPMARK --addr src --shift 16
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--and-mask 0xFFFF
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\-t mangle \-A PREROUTING \-s 2001:db8::/32 \-j IPMARK \-\-addr src \-\-shift
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16 \-\-and\-mask 0xFFFF
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