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# udp dport 53 masquerade
ip test-ip4 postrouting
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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
[ payload load 1b @ network header + 9 => 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 packets 0 bytes 0 masquerade
ip test-ip4 postrouting
[ payload load 4b @ network header + 16 => reg 1 ]
[ cmp gte reg 1 0x0000000a ]
[ cmp lte reg 1 0x0403020a ]
[ payload load 1b @ network header + 9 => 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 new,established tcp dport vmap {22 : drop, 222 : drop } masquerade
map%d test-ip4 b
map%d test-ip4 0
element 00001600 : 0 [end] element 0000de00 : 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 ]
[ payload load 1b @ network header + 9 => reg 1 ]
[ cmp eq reg 1 0x00000006 ]
[ payload load 2b @ transport header + 2 => reg 1 ]
[ lookup reg 1 set map%d dreg 0 ]
[ masq ]
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