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bot blocking inginx configuration #73

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bot blocking inginx configuration
zonyzeb Jun 9, 2025
6d93916
Update deploy/deploy-scripts/analytics-prod.yml
zonyzeb Jun 9, 2025
c763ac7
NGINX if directives do not support the 'OR' operator.
zonyzeb Jun 9, 2025
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42 changes: 40 additions & 2 deletions deploy/deploy-scripts/analytics-prod.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,45 @@ metadata:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
cert-manager.io/cluster-issuer: bbys-platform-letsencrypt-prod

# Rate limiting to prevent aggressive scraping
nginx.ingress.kubernetes.io/rate-limit: "10"
nginx.ingress.kubernetes.io/rate-limit-window: "1m"
nginx.ingress.kubernetes.io/rate-limit-connections: "5"

# Block common bot user agents
nginx.ingress.kubernetes.io/server-snippet: |
# Consolidated user agent checks
if ($http_user_agent ~* (bot|crawler|spider|scraper|curl|wget|python|java|go-http|axios|postman|insomnia|httpie|scan|hack|exploit|inject|attack|test|nikto|nmap|masscan|zap|burp|sqlmap|dirb|gobuster|ffuf|headless|phantom|selenium|puppeteer)) {
return 403;
}
if ($http_user_agent = "") {
return 403;
}
# Block requests with suspicious headers
if ($http_x_forwarded_for ~* (tor-exit|proxy|vpn)) {
return 403;
}

# Block requests with no referrer and suspicious patterns
if ($http_referer = "" AND $request_method = "GET" AND $args ~ "(select|union|insert|delete|update|drop|create|alter)") {
return 403;
Comment on lines +129 to +130
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Copilot AI Jun 9, 2025

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NGINX if directives do not support the 'AND' operator. Consider splitting these conditions into multiple 'if' statements or refactoring using a combined regex expression.

Suggested change
if ($http_referer = "" AND $request_method = "GET" AND $args ~ "(select|union|insert|delete|update|drop|create|alter)") {
return 403;
if ($http_referer = "") {
if ($request_method = "GET") {
if ($args ~ "(select|union|insert|delete|update|drop|create|alter)") {
return 403;
}
}

Copilot uses AI. Check for mistakes.
Comment on lines +129 to +130
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Copilot AI Jun 9, 2025

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The use of 'AND' to combine multiple conditions in the if directive may not work as expected in Nginx. Consider rewriting the condition using separate if blocks or a supported technique to combine conditions.

Suggested change
if ($http_referer = "" AND $request_method = "GET" AND $args ~ "(select|union|insert|delete|update|drop|create|alter)") {
return 403;
if ($http_referer = "") {
if ($request_method = "GET") {
if ($args ~ "(select|union|insert|delete|update|drop|create|alter)") {
return 403;
}
}

Copilot uses AI. Check for mistakes.
}

# Additional security headers
nginx.ingress.kubernetes.io/configuration-snippet: |
more_set_headers "X-Frame-Options: DENY";
more_set_headers "X-Content-Type-Options: nosniff";
more_set_headers "X-XSS-Protection: 1; mode=block";
more_set_headers "Referrer-Policy: strict-origin-when-cross-origin";

# Log blocked requests for monitoring
access_log /var/log/nginx/analytics-blocked.log combined if=$blocked_ua;

# Whitelist legitimate monitoring services (optional)
nginx.ingress.kubernetes.io/whitelist-source-range: |
# Add your monitoring service IPs here if needed
# 1.2.3.4/32,5.6.7.8/32
spec:
tls:
- hosts:
Expand All @@ -113,7 +152,6 @@ spec:
- hosts:
- analytics.barnebys.com
secretName: tls-secret-bbys-analytics-com-service

rules:
- host: analytics.barnebys.net
http:
Expand All @@ -134,4 +172,4 @@ spec:
service:
name: bbys-analytics-service-svc
port:
number: 80
number: 80