# iifname "eth0" tcp dport 81 snat ip to 192.168.3.2 inet test-inet postrouting [ meta load iifname => reg 1 ] [ cmp eq reg 1 0x30687465 0x00000000 0x00000000 0x00000000 ] [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00005100 ] [ immediate reg 1 0x0203a8c0 ] [ nat snat ip addr_min reg 1 addr_max reg 0 ] # iifname "eth0" tcp dport 81 ip saddr 10.1.1.1 snat to 192.168.3.2 inet test-inet postrouting [ meta load iifname => reg 1 ] [ cmp eq reg 1 0x30687465 0x00000000 0x00000000 0x00000000 ] [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00005100 ] [ meta load nfproto => reg 1 ] [ cmp eq reg 1 0x00000002 ] [ payload load 4b @ network header + 12 => reg 1 ] [ cmp eq reg 1 0x0101010a ] [ immediate reg 1 0x0203a8c0 ] [ nat snat ip addr_min reg 1 addr_max reg 0 ] # iifname "eth0" tcp dport 81 snat ip6 to dead::beef inet test-inet postrouting [ meta load iifname => reg 1 ] [ cmp eq reg 1 0x30687465 0x00000000 0x00000000 0x00000000 ] [ meta load l4proto => reg 1 ] [ cmp eq reg 1 0x00000006 ] [ payload load 2b @ transport header + 2 => reg 1 ] [ cmp eq reg 1 0x00005100 ] [ immediate reg 1 0x0000adde 0x00000000 0x00000000 0xefbe0000 ] [ nat snat ip6 addr_min reg 1 addr_max reg 0 ] # iifname "foo" masquerade random inet test-inet postrouting [ meta load iifname => reg 1 ] [ cmp eq reg 1 0x006f6f66 0x00000000 0x00000000 0x00000000 ] [ masq flags 0x4 ]