CHECKSUM target support

modulename: xt_CHECKSUM.ko


Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>CHECKSUM target support
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
This option adds a `CHECKSUM' target, which can be used in the iptables mangle
table to work around buggy DHCP clients in virtualized environments.

Some old DHCP clients drop packets because they are not aware
that the checksum would normally be offloaded to hardware and
thus should be considered valid.
This target can be used to fill in the checksum using iptables
when such packets are sent via a virtual network device.

To compile it as a module, choose M here. If unsure, say N.

source code: