Re: TCPv6: Possible SYN flooding on port 80. Sending cookies.

below is the nginx status on both server , server who was having issue with number of writing was now observed with still increase in writing requests :
serer without any issue :
Active connections: 7045
server accepts handled requests
207550 207550 238713
Reading: 0 Writing: 726 Waiting: 6319

with issue :
Active connections: 9927
server accepts handled requests
277077 277077 317874
Reading: 0 Writing: 4152 Waiting: 5775

PFB part of nginx.conf of server with issue :
worker_processes auto;
events {
worker_connections 4096;
use epoll;
multi_accept on;
}
worker_rlimit_nofile 100001;

http {
include mime.types;
default_type video/mp4;
proxy_buffering on;
proxy_buffer_size 4096k;
proxy_buffers 5 4096k;
sendfile on;
keepalive_timeout 30;
keepalive_requests 60000;
send_timeout 10;
tcp_nodelay on;
tcp_nopush on;
reset_timedout_connection on;
gzip off;
server_tokens off;
#aio threads;