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The conntrack kernel module loads the first time you even list the "nat" table in iptables
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| [ngoldman@px-awstest-0201 ~]$ lsmod | |
| Module Size Used by | |
| xt_comment 1034 2 | |
| xt_owner 1252 1 | |
| iptable_filter 2793 1 | |
| ip_tables 17895 1 iptable_filter | |
| ip6table_filter 2889 0 | |
| ip6_tables 18796 1 ip6table_filter | |
| ipv6 336282 125 | |
| ixgbevf 62017 0 | |
| i2c_piix4 11232 0 | |
| i2c_core 29132 1 i2c_piix4 | |
| ext4 379559 4 | |
| jbd2 93252 1 ext4 | |
| mbcache 8193 1 ext4 | |
| xen_blkfront 21998 8 | |
| pata_acpi 3701 0 | |
| ata_generic 3837 0 | |
| ata_piix 24409 0 | |
| dm_mirror 14864 0 | |
| dm_region_hash 12085 1 dm_mirror | |
| dm_log 9930 2 dm_mirror,dm_region_hash | |
| dm_mod 102467 2 dm_mirror,dm_log | |
| [ngoldman@px-awstest-0201 ~]$ sudo iptables -nvL -t nat | |
| Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes) | |
| pkts bytes target prot opt in out source destination | |
| Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes) | |
| pkts bytes target prot opt in out source destination | |
| Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) | |
| pkts bytes target prot opt in out source destination | |
| [ngoldman@px-awstest-0201 ~]$ lsmod | |
| Module Size Used by | |
| iptable_nat 5923 0 | |
| nf_nat 22676 1 iptable_nat | |
| nf_conntrack_ipv4 9186 3 iptable_nat,nf_nat | |
| nf_conntrack 79537 3 iptable_nat,nf_nat,nf_conntrack_ipv4 | |
| nf_defrag_ipv4 1483 1 nf_conntrack_ipv4 | |
| xt_comment 1034 2 | |
| xt_owner 1252 1 | |
| iptable_filter 2793 1 | |
| ip_tables 17895 2 iptable_nat,iptable_filter | |
| ip6table_filter 2889 0 | |
| ip6_tables 18796 1 ip6table_filter | |
| ipv6 336282 123 | |
| ixgbevf 62017 0 | |
| i2c_piix4 11232 0 | |
| i2c_core 29132 1 i2c_piix4 | |
| ext4 379559 4 | |
| jbd2 93252 1 ext4 | |
| mbcache 8193 1 ext4 | |
| xen_blkfront 21998 8 | |
| pata_acpi 3701 0 | |
| ata_generic 3837 0 | |
| ata_piix 24409 0 | |
| dm_mirror 14864 0 | |
| dm_region_hash 12085 1 dm_mirror | |
| dm_log 9930 2 dm_mirror,dm_region_hash | |
| dm_mod 102467 2 dm_mirror,dm_log |
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