1 This target is used to set the Netfilter mark value associated with the packet. 2 It can, for example, be used in conjunction with routing based on fwmark (needs 3 iproute2). If you plan on doing so, note that the mark needs to be set in the 4 PREROUTING chain of the mangle table to affect routing. 5 The mark field is 32 bits wide. 6 .TP 7 \fB\-\-set\-xmark\fP \fIvalue\fP[\fB/\fP\fImask\fP] 8 Zeroes out the bits given by \fImask\fP and XORs \fIvalue\fP into the packet 9 mark ("nfmark"). If \fImask\fP is omitted, 0xFFFFFFFF is assumed. 10 .TP 11 \fB\-\-set\-mark\fP \fIvalue\fP[\fB/\fP\fImask\fP] 12 Zeroes out the bits given by \fImask\fP and ORs \fIvalue\fP into the packet 13 mark. If \fImask\fP is omitted, 0xFFFFFFFF is assumed. 14 .PP 15 The following mnemonics are available: 16 .TP 17 \fB\-\-and\-mark\fP \fIbits\fP 18 Binary AND the nfmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark 19 0/\fP\fIinvbits\fP, where \fIinvbits\fP is the binary negation of \fIbits\fP.) 20 .TP 21 \fB\-\-or\-mark\fP \fIbits\fP 22 Binary OR the nfmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP 23 \fIbits\fP\fB/\fP\fIbits\fP.) 24 .TP 25 \fB\-\-xor\-mark\fP \fIbits\fP 26 Binary XOR the nfmark with \fIbits\fP. (Mnemonic for \fB\-\-set\-xmark\fP 27 \fIbits\fP\fB/0\fP.) 28
