IPV6安全保护

1.fail2ban安装

sudo apt install fail2ban

2.拷贝配置文件

#/etc/fail2ban/jail.conf 每次更新都会被重置 
sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
sudo vim /etc/fail2ban/jail.local

3.修改jail.local文件

[sshd]
enabled  = true
port     = ssh
filter   = sshd
logpath  = /var/log/auth.log
# 只要是尝试密码登录（无论对错）或者私钥校验失败，都会被记录
maxretry = 3
findtime = 10m
bantime  = 24h# 关键：确保使用 nftables 以完美支持 IPv6
banaction = nftables-multiport# 一天尝试5次失败，封一周
[recidive]
enabled  = true
logpath  = /var/log/fail2ban.log
banaction = nftables-multiport
bantime  = 1w
findtime = 1d
maxretry = 5

4.启用fail2ban

sudo systemctl restart fail2ban

5.查看哪些ipv6被封禁

#查看ipv6被封禁
sudo fail2ban-client status sshd
#解封自己的IPv6
sudo fail2ban-client set sshd unbanip <你的IPv6地址>
#查看日志
tail -f /var/log/fail2ban.log