# udp dport 53 masquerade ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq ] # udp dport 53 masquerade random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x4 ] # udp dport 53 masquerade random,persistent ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0xc ] # udp dport 53 masquerade random,persistent,fully-random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x1c ] # udp dport 53 masquerade random,fully-random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x14 ] # udp dport 53 masquerade random,fully-random,persistent ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x1c ] # udp dport 53 masquerade persistent ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x8 ] # udp dport 53 masquerade persistent,random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0xc ] # udp dport 53 masquerade persistent,random,fully-random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x1c ] # udp dport 53 masquerade persistent,fully-random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x18 ] # udp dport 53 masquerade persistent,fully-random,random ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ masq flags 0x1c ] # tcp dport { 1,2,3,4,5,6,7,8,101,202,303,1001,2002,3003} masquerade __set%d test-ip4 3 __set%d test-ip4 0 element 00000100 : 0 [end] element 00000200 : 0 [end] element 00000300 : 0 [end] element 00000400 : 0 [end] element 00000500 : 0 [end] element 00000600 : 0 [end] element 00000700 : 0 [end] element 00000800 : 0 [end] element 00006500 : 0 [end] element 0000ca00 : 0 [end] element 00002f01 : 0 [end] element 0000e903 : 0 [end] element 0000d207 : 0 [end] element 0000bb0b : 0 [end] ip test-ip4 postrouting [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ lookup reg 1 set __set%d ] [ masq ] # ip daddr 10.0.0.0-10.2.3.4 udp dport 53 counter masquerade ip test-ip4 postrouting [ payload load 4b @ network header + 16 => reg 1 ] [ cmp gte reg 1 0x0000000a ] [ cmp lte reg 1 0x0403020a ] [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000011 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00003500 ] [ counter pkts 0 bytes 0 ] [ masq ] # iifname "eth0" ct state established,new tcp dport vmap {22 : drop, 222 : drop } masquerade __map%d test-ip4 b __map%d test-ip4 0 element 00001600 : drop 0 [end] element 0000de00 : drop 0 [end] ip test-ip4 postrouting [ meta load iifname => reg 1 ] [ cmp eq reg 1 0x30687465 0x00000000 0x00000000 0x00000000 ] [ ct load state => reg 1 ] [ bitwise reg 1 = ( reg 1 & 0x0000000a ) ^ 0x00000000 ] [ cmp neq reg 1 0x00000000 ] [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ lookup reg 1 set __map%d dreg 0 ] [ masq ] # ip protocol 6 masquerade to :1024 ip test-ip4 postrouting [ payload load 1b @ network header + 9 => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ immediate reg 1 0x00000004 ] [ masq proto_min reg 1 flags 0x2 ] # ip protocol 6 masquerade to :1024-2048 ip test-ip4 postrouting [ payload load 1b @ network header + 9 => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ immediate reg 1 0x00000004 ] [ immediate reg 2 0x00000008 ] [ masq proto_min reg 1 proto_max reg 2 flags 0x2 ]