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     new 4e99530858d blog: Add Secure your API with these 16 Practices with 
Apache APISIX - part 2 post (#1775)
4e99530858d is described below

commit 4e99530858d09f9ce85b96b4fd28163f81a52dde
Author: Nicolas Frรคnkel <[email protected]>
AuthorDate: Fri Mar 1 17:22:57 2024 -0500

    blog: Add Secure your API with these 16 Practices with Apache APISIX - part 
2 post (#1775)
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+---
+title: Secure your API with these 16 Practices with Apache APISIX - part 2
+authors:
+  - name: Nicolas Frรคnkel
+    title: Author
+    url: https://github.com/nfrankel
+    image_url: https://avatars.githubusercontent.com/u/752258
+keywords:
+  - APISIX
+  - Security
+  - Good practices
+description: >
+  A couple of months ago, I stumbled upon this list of  Secure your API with 
these 16 practices to secure your API.
+  Authentication. Authorization. Data Redaction. Encryption. Error Handling. 
Input Validation & Data Sanitization.
+  Intrusion Detection Systems. IP Whitelisting. Logging and Monitoring.
+  Rate Limiting. Secure Dependencies. Security Headers. Token Expiry. Use of 
Security Standards and Frameworks.
+  Web Application Firewall. API Versioning
+tags: [Ecosystem]
+image: 
https://static.apiseven.com/uploads/2024/02/15/kgIjhRXf_img-BuLDzx81CexYQAzkaF36h_large.webp
+---
+
+
+>[Last week](https://blog.frankel.ch/secure-api-practices-apisix/1/), we 
listed 16 practices to help secure one's APIs and described how to implement 
them with Apache APISIX.
+>
+> 1. ~~Authentication ๐Ÿ•ต๏ธ๏ธ - Verifies the identity of users accessing APIs.~~
+> 2. ~~Authorization ๐Ÿšฆ - Determines permissions of authenticated users.~~
+> 3. Data Redaction ๐Ÿ–๏ธ - Obscures sensitive data for protection.
+> 4. Encryption ๐Ÿ”’ - Encodes data so only authorized parties can decode it.
+> 5. Error Handling โŒ - Manages responses when things go wrong, avoiding 
revealing sensitive info.
+> 6. ~~Input Validation & Data Sanitization ๐Ÿงน - Checks input data and removes 
harmful parts.~~
+> 7. Intrusion Detection Systems ๐Ÿ‘€ - Monitor networks for suspicious 
activities.
+> 8. ~~IP Whitelisting ๐Ÿ“ - Permits API access only from trusted IP addresses.~~
+> 9. ~~Logging and Monitoring ๐Ÿ–ฅ๏ธ - Keeps detailed logs and regularly monitors 
APIs.~~
+>10. ~~Rate Limiting โฑ๏ธ - Limits user requests to prevent overload.~~
+>11. Secure Dependencies ๐Ÿ“ฆ - Ensures third-party code is free from 
vulnerabilities.
+>12. Security Headers ๐Ÿ“‹ - Enhances site security against types of attacks like 
XSS.
+>13. Token Expiry โณ - Regularly expiring and renewing tokens prevents 
unauthorized access.
+>14. Use of Security Standards and Frameworks ๐Ÿ“˜ - Guides your API security 
strategy.
+>15. Web Application Firewall ๐Ÿ”ฅ - Protects your site from HTTP-specific 
attacks.
+>16. API Versioning ๐Ÿ”„ - Maintains different versions of your API for seamless 
updates.
+>
+>This week, we will look at the remaining practices.
+
+<!--truncate-->
+
+## Encryption and Data Redaction
+
+First, we must protect the communication channel between our APIs and clients 
from unwanted reads and writes. That's the realm of TLS. In this regard, mutual 
TLS is state-of-the-art. Please read this [previous 
post](https://blog.frankel.ch/mtls-everywhere/) about mTLS in Apache APISIX.
+
+I can't guess what the author meant by "Obscures sensitive data for 
protection". If data exchanges are encrypted, it doesn't make sense to 
obfuscate any payload.
+
+## Error Handling
+
+The list mentions avoiding revealing sensitive info when an error happens. 
Indeed, some poorly coded upstreams can disclose such data. Here's an example 
of Tomcat when developers forgot to configure an error page:
+
+It reveals the upstream's technology, version, and the guilty code.
+
+Apache APISIX can intercept such a response and rewrite it:
+
+```yaml
+routes:
+  - upstream_id: 1
+    plugins:
+      response-rewrite:
+        vars: [[ "status","==",500 ]]                        #1
+        body: { "error" : "An unknown exception happened"}   #2
+```
+
+1. Triggered only in case of HTTP status code 500 returned by the upstream. 
You can add additional status codes if necessary
+2. The body to return
+
+To make sure the above configuration is applied consistently, we can also make 
it a global rule:
+
+```yaml
+global_rules:
+  - id: 1
+    plugins:
+      response-rewrite:
+        vars: [[ "status","==",500 ]]
+        body: { "error" : "An unknown exception happened"}
+```
+
+## Security Headers
+
+The OWASP lists plenty of [HTTP 
Headers](https://cheatsheetseries.owasp.org/cheatsheets/HTTP_Headers_Cheat_Sheet.html)
 you can set to improve the security of your web apps and APIs. Apache APISIX 
provides two dedicated plugins for specific security risks:
+
+* [CORS](https://apisix.apache.org/docs/apisix/plugins/cors/)
+* [CSRF](https://apisix.apache.org/docs/apisix/plugins/csrf/)
+
+For any other header, you can use the more generic 
[response-rewrite](https://apisix.apache.org/docs/apisix/plugins/response-rewrite/)
 plugin to add them. Finally, we can remove default HTTP response headers, such 
as `Server`, to make targeted attacks less likely.
+
+```yaml
+global_rules:                               #1
+  - id: 1
+    plugins:
+      response-rewrite:
+        headers:
+          set:
+            X-Content-Type-Options: nosniff #2
+          remove:
+            - Server                        #3
+```
+
+1. Do on every route - security by default! It still can be overridden on a 
per-route basis, in case of need
+2. Tell the browser not to infer the content type if it's not explicitly set
+3. Don't advertise the server
+
+## WAF and API versioning
+
+I've addressed these two points in previous posts:
+
+* [Hardening Apache APISIX with the OWASP's Coraza and Core 
Ruleset](https://blog.frankel.ch/apisix-owasp-coraza-core-ruleset/)
+* [API Versioning](https://blog.frankel.ch/api-versioning/)
+
+In short, Apache APSIX allows embedding the [Coraza WAF](https://coraza.io/) 
as a Rust plugin.
+
+On the versioning side, one can choose three different approaches: path-based, 
query parameter-based, and header-based. APISIX supports all of them.
+
+## Other items
+
+The remaining items are:
+
+* Intrusion Detection Systems
+* Secure Dependencies
+* Use of Security Standards and Frameworks
+
+I'm afraid that APISIX cannot help with any of them. You need to address them 
on the upstream side.
+
+## Conclusion
+
+In this two-post series, I've addressed most of the 16 practices to secure 
APIs with Apache APISIX. While I don't claim the list is exhaustive, it's a 
solid basis to improve the security of one's system.

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