docker kill $(docker ps -q)
docker_clean_ps
docker rmi $(docker images -a -q)

sudo iptables -A FORWARD -s IP-ADDRESS -j DROP

#!/bin/bash

# Check if an IP address is provided
if [ -z "$1" ]; then
    echo "Usage: $0 <IP_ADDRESS>"
    exit 1
fi

IP_ADDRESS=$1

echo "Blocking IP: $IP_ADDRESS"

# Add iptables rule to block the IP
sudo iptables -A INPUT -s $IP_ADDRESS -j DROP

echo "IP $IP_ADDRESS has been blocked."

#! /bin/bash
NETCARD=eth0
MAXBANDWIDTH=100000

# reinit
tc qdisc del dev $NETCARD root handle 1
tc qdisc add dev $NETCARD root handle 1: htb default 9999

# create the default class
tc class add dev $NETCARD parent 1:0 classid 1:9999 htb rate $(( $MAXBANDWIDTH ))kbit ceil $(( $MAXBANDWIDTH ))kbit burst 5k prio 9999

# control bandwidth per IP
declare -A ipctrl
# define list of IP and bandwidth (in kilo bits per seconds) below
ipctrl[192.168.1.1]="256"
ipctrl[192.168.1.2]="128"
ipctrl[192.168.1.3]="512"
ipctrl[192.168.1.4]="32"

mark=0
for ip in "${!ipctrl[@]}"
do
    mark=$(( mark + 1 ))
    bandwidth=${ipctrl[$ip]}

    # traffic shaping rule
    tc class add dev $NETCARD parent 1:0 classid 1:$mark htb rate $(( $bandwidth ))kbit ceil $(( $bandwidth ))kbit burst 5k prio $mark

    # netfilter packet marking rule
    iptables -t mangle -A INPUT -i $NETCARD -s $ip -j CONNMARK --set-mark $mark

    # filter that bind the two
    tc filter add dev $NETCARD parent 1:0 protocol ip prio $mark handle $mark fw flowid 1:$mark

    echo "IP $ip is attached to mark $mark and limited to $bandwidth kbps"
done

#propagate netfilter marks on connections
iptables -t mangle -A POSTROUTING -j CONNMARK --restore-mark

Reference link: https://serverfault.com/questions/191560/how-can-i-do-traffic-shaping-in-linux-by-ip

https://github.com/felixonmars/dnsmasq-china-list

dhcp-range=tap_unibits,100.64.0.10,100.64.7.250,255.255.248.0,5m
dhcp-option=3,100.64.0.1
dhcp-option=6,8.8.8.8
dhcp-option=6,8.8.4.4

/var/lib/munin

If all RRD files are deleted, the graph will be reset.

vi /etc/cron.d/munin

Change the */5 to */1

1. apt-get install ddclient

2. mkdir /etc/ddclient

3. copy ddclient.conf to /etc/ddclient

4. scp ddclient-3.9.0/ddclient alfred@172.16.13.250:/tmp

5. copy ddclient-3.9.0/ddclient to /usr/sbin/

6. scp /etc/default/ddclient to target server

7. copy /etc/default/ddclient to target server's /etc/default/ddclient

8. apt-get install libdata-validate-ip-perl
   apt-get install libjson-any-perl

Remark: Need to use "systemctl start ddclient.service" to start the service

add this in your dsl-provider conf file located at /etc/ppp/peers/dsl-provider :

persist
maxfail 0
holdoff 10
lcp-echo-interval 20
lcp-echo-failure 3

Reference: https://ubuntuforums.org/archive/index.php/t-1955345.html