liwsakilive

###
# Proxmox or other server kernel params cheap tune and secure.
# Try it if you have heavy load on server - network or memory / disk.
# No harm assumed but keep your eyes open.
#
# @updated: 2020-02-06 - more params used, adjust some params values, more comments on params
#

### NETWORK ###

liwsakilive

#Convert vmware image to raw format image file
qemu-img convert -f vmdk -p -O raw machine.name.vmdk /opt/machine-name.img

#DD image into logical volume
dd if=machine-name.img of=/dev/vg_vmstore/lv_001-prod-machine-name-win001

#Use create virtual machine with existing disk

liwsakilive

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

liwsakilive

# Kernel sysctl configuration file for Linux
# https://www.kernel.org/doc/Documentation/sysctl/
#
# Original by Michiel Klaver <https://klaver.it/linux/sysctl.conf>
# Modify by Kawin Viriyaprasopsook <[email protected]>
#
# The following is suitable for dedicated web server, mail, file server, KVM server etc.
# place file in /etc/sysctl.d/60-zercle.conf
# and run sysctl --system

liwsakilive

### 1: Drop invalid packets ###
/sbin/iptables -t mangle -A PREROUTING -m conntrack --ctstate INVALID -j DROP

### 2: Drop TCP packets that are new and are not SYN ###
/sbin/iptables -t mangle -A PREROUTING -p tcp ! --syn -m conntrack --ctstate NEW -j DROP

### 3: Drop SYN packets with suspicious MSS value ###
/sbin/iptables -t mangle -A PREROUTING -p tcp -m conntrack --ctstate NEW -m tcpmss ! --mss 536:65535 -j DROP

### 4: Block packets with bogus TCP flags ###

liwsakilive

# Outbound UDP Flood protection in a user defined chain.
iptables -N udp-flood
iptables -A OUTPUT -p udp -j udp-flood
iptables -A udp-flood -p udp -m limit --limit 50/s -j RETURN
iptables -A udp-flood -j LOG --log-level 4 --log-prefix 'UDP-flood attempt: '
iptables -A udp-flood -j DROP

liwsakilive

proxy_buffering on;

proxy_cache_path  /var/nginx/cache  levels=1:2    keys_zone=STATIC:10m   inactive=24h  max_size=1g;

limit_req_zone $binary_remote_addr zone=five_per_second:10m rate=5r/s;
limit_req_zone $binary_remote_addr zone=ten_per_one_minute:10m rate=10r/m;

server {
    listen 80;
    server_name       www.yourdomain.com;