UFW 防火牆

apt install ufw
ufw default deny incoming
ufw default allow outgoing
ufw allow ssh
ufw allow 'Nginx Full'
ufw logging off
ufw enable

Fail2ban 防止暴力破解

apt install fail2ban

TCP BBR

echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p
sysctl net.ipv4.tcp_available_congestion_control
lsmod | grep bbr
 

Nginx

關閉日誌

log_not_found       off;
access_log          off;
error_log           /dev/null;

隱藏資訊

server_tokens       off;

proxy_hide_header   X-Powered-By;
proxy_hide_header   Server;

安全

SSL session

ssl_session_timeout 1d;
ssl_session_cache   shared:SSL:10m;
ssl_session_tickets off;

Mozilla Intermediate configuration

(2020年推薦)

ssl_protocols       TLSv1.2 TLSv1.3;
ssl_ciphers         ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
ssl_prefer_server_ciphers off;
 

OCSP Stapling

ssl_stapling        on;
ssl_stapling_verify on;
resolver            127.0.0.53 valid=60s;
resolver_timeout    2s;

NGINX要監聽127.0.0.53，需要開啟本地名稱解析服務。

開啟本地名稱解析服務

systemctl enable --now systemd-resolved.service

開啟服務後，DNS服務常駐127.0.0.53。