how to achieve DOS protection？ nginx+modlib3.0

[tdoubley]

Hi!
I want test DOS protection, but I find the aciton expirevar not implement，that‘s mean ModLib not support this function now？

ACTION_EXPIRE_VAR
{
//ACTION_NOT_SUPPORTED("ExpireVar", @0);
ACTION_CONTAINER($$, new actions::Action($1));
}

SecRule IP:DOS_BLOCK "@eq 1"
"chain,
phase:1,
id:912120,
drop,
tag:'application-multi',
tag:'language-multi',
tag:'platform-multi',
tag:'attack-dos',
msg:'Denial of Service (DoS) attack identified from %{tx.real_ip} (%{tx.dos_block_counter} hits since last alert)'"
SecRule &IP:DOS_BLOCK_FLAG "@eq 0"
"setvar:ip.dos_block_counter=+1,
setvar:ip.dos_block_flag=1,
expirevar:ip.dos_block_flag=60,
setvar:tx.dos_block_counter=%{ip.dos_block_counter},
setvar:ip.dos_block_counter=0"

[victorhora]

Duplicate with #1803 and #1830 and also related with #1754.

Please follow up on #1803. Thanks.

[tdoubley]

Thank you for your answer @victorhora ，I will follow up on #1803.