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Vladimir Smagin 991b2e8e0f readme 1 月之前
ansible add ansible playbook 1 月之前
vendor blocking by tables 1 月之前
.gitignore add API 1 月之前
Dockerfile add API 1 月之前
README.md readme 1 月之前
build.sh add API 1 月之前
go.mod blocking by tables 1 月之前
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ip-blocker-set.sh readme 1 月之前
ip-blocker.conf add API 1 月之前
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My own IP storage for fail2ban. Written to blacklist fucking botnets bruteforcing my servers. It centralize information about blocks across all my servers in one single watch tower.


Watch tower

Create config file /opt/ip-blocker/ip-blocker.conf with contents:

  masterDB: "/var/ip-blocker/ip.db"
  clean: LastWeek
  listen: ""

Option clean means you want to delete records older than week. Possible values:

  • Recreate
    Remove database file and create new. Not acceptable for docker installation, so do not use it.
  • Full
    Drop single table and recreate it.
  • LastDay
    Remove all records older than day.
  • LastWeek
    Remove all records older than week.
  • LastMonth
    Remove all records older than 30 days.

Create empty file for database file and run docker container

$> touch /opt/ip-blocker/ip.db
$> docker run -d --name ip-blocker \
   -p \
   -v /opt/ip-blocker/ip-blocker.conf:/etc/ip-blocker.conf \
   -v /opt/ip-blocker/ip.db:/var/ip-blocker/ip.db \
   registry.blindage.org/ip-blocker-db:latest -config /etc/ip-blocker.conf


You can protect API with webserver basic auth and SSL, curl can handle it directly from command line (something like https://login:password@my-watchtower.ru/list/sshd/1). To do it bind container to instead of and proxy from nginx or other webserver you love.

All your servers

At first step install fail2ban into your OS. How to do it you already know because you are sysadmin.

Next step add line to /etc/fail2ban/action.d/iptables-multiport.conf

actionban = <iptables> -I f2b-<name> 1 -s <ip> -j <blocktype>
            /usr/bin/curl -s https://login:password@my-watchtower.ru/set/`hostname`/<name>/<ip>/<protocol>/<port>

Directive set means you want to add IP into database:

  • hostname tells what server added record
  • name is a block table name (i.e. sshd, used to add rules into iptables)
  • ip to block
  • protocol (tcp or udp)
  • port number (or service name from /etc/services, i.e. ssh).

At last step create bash script somewhere on server and add to crontab.

source /etc/profile

# cron for every minute run

# block ssh
IPs=$(curl -s https://login:password@my-watchtower.ru/list/sshd/1)
for ip in $IPs
  echo "Blocking IP $ip"
  fail2ban-client set sshd banip $ip

Directive list means you want get IP list, sshd is a block table name and last parameter is a minutes to get records not older than 1 minute.

Wow! You did so much! I hope you did it with Ansible or other program you love, just imagine how to do it by hands for all servers...


  • get list of block tables
  • get raw list of all blocked IPs

Copyright by Vladimir Smagin (21h) 2020
http://blindage.org email: 21h@blindage.org
Project page: https://git.blindage.org/21h/ip-blocker-db