We recommend using Cloudflare to shield your platform since it provides various security and performance enhancements out of the box without interfering with the deployment process.
Cloudflare provides traffic protection by proxying all the incoming traffic, though you can enable enhanced security measures in the case of a DDOS attack.
If you're encountering a DDOS attack, perform the following steps:
2. Open your load balancer logs(Ingress Controller/Traefik/etc.) and check for IPs that occur the most 3. Go to your Cloudflare domain and enable Firewall>Firewall Rules 4. Click on Create a Firewall rule and add all the suspicious IPs
5. Observe the incoming traffic on the Analytics page and monitor load balancer logs to see whether there still are suspicious IP addresses sending requests to the platform
6. Disable Under Attack mode after the attack is mitigated
You can add the following annotations to your
envoy Ingress to define limits on API gateway connections and transmission rates:
nginx.ingress.kubernetes.io/limit-connections: number of concurrent connections allowed from a single IP address. A 503 error is returned after this limit is exceeded.
nginx.ingress.kubernetes.io/limit-rps: number of requests accepted from a given IP each second. The burst limit is set to this limit multiplied by the burst multiplier, the default multiplier is 5. When this limit is exceeded, limit-req-status-code default: 503 is returned.
nginx.ingress.kubernetes.io/limit-rpm: number of requests accepted from a given IP each minute. The burst limit is set to this limit multiplied by the burst multiplier, the default multiplier is 5. When clients exceed this limit, limit-req-status-code default: 503 is returned.
nginx.ingress.kubernetes.io/limit-burst-multiplier: multiplier for rate limit bursts; this could be useful for cases when clients send bursts of requests during a short interval of time(<1000 ms), with limit bursting the server would still accept up to limit-rps * limit-burst-multiplier requests. The default value is 5, 503 is returned after the limit is exceeded.
nginx.ingress.kubernetes.io/limit-rate-after: initial number of kilobytes after which the further transmission of a response to a given connection will be rate limited. This feature must be used with proxy-buffering enabled.
nginx.ingress.kubernetes.io/limit-rate: number of kilobytes per second allowed to send to a given connection. The zero value disables rate limiting. This feature must be used with proxy-buffering enabled.
nginx.ingress.kubernetes.io/limit-whitelist: client IP source ranges to be excluded from rate-limiting. The value is a comma separated list of CIDRs.
If you specify multiple annotations in a single Ingress rule, limits are applied in the order
To configure settings globally for all
Ingress rules, the
limit-rate values may be set in the NGINX ConfigMap(you can find its name by running
kubectl describe po nginx-ingress-*** and looking for the
--configmap option). The value set in an
Ingress annotation will override the global setting.
If you'd like to apply rate limiting on specific endpoints, you can use separate Ingress resources for it. All you have to do is specify needed
apiVersion: extensions/v1beta1 kind: Ingress metadata: name: envoy-rate-limit-markets annotations: nginx.ingress.kubernetes.io/limit-rps: 300 ... spec: rules: - host: www.opendax.com http: paths: - backend: serviceName: envoy servicePort: 10000 path: /api/v2/finex/market/orders - backend: serviceName: envoy servicePort: 10000 path: /api/v2/peatio/public/markets
Traefik allows for rate limiting per Compose service via Docker labels.
average - is the maximum rate, by default in requests by second, allowed for the given source.
period, in combination with
average, defines the actual maximum rate, such as:
r = average / period
It defaults to 1 second.
burst - maximum number of requests allowed to go through in the same arbitrarily small period of time.
version: '3.6' services: gateway: restart: always image: envoyproxy/envoy:v1.10.0 volumes: - ../config/gateway:/etc/envoy/ command: /usr/local/bin/envoy -l info -c /etc/envoy/envoy.yaml labels: - "traefik.http.routers.gateway-opendax.rule=Host(`www.app.local`) && PathPrefix(`/api`,`/admin`,`/assets/`)" - "traefik.enable=true" - "traefik.http.services.gateway-opendax.loadbalancer.server.port=8099" - "traefik.http.routers.gateway-opendax.entrypoints=web" # Rate limiting - "traefik.http.middlewares.gateway-opendax.ratelimit.average=100" - "traefik.http.middlewares.gateway-opendax.ratelimit.period=1m" - "traefik.http.middlewares.gateway-opendax.ratelimit.burst=50"