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Improve docs on security http headers (#5262)

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* Improve docs on security http headers

* Apply suggestions from code review

---------

Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
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Dima Lazerka 2024-02-01 04:40:11 -08:00 committed by GitHub
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3
README.md
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@ -1954,6 +1954,9 @@ General security recommendations:
- All the VictoriaMetrics components must run in protected private networks without direct access from untrusted networks such as Internet. The exception is [vmauth](https://docs.victoriametrics.com/vmauth.html) and [vmgateway](https://docs.victoriametrics.com/vmgateway.html).
- All the requests from untrusted networks to VictoriaMetrics components must go through auth proxy such as vmauth or vmgateway. The proxy must be set up with proper authentication and authorization.
- Prefer using lists of allowed API endpoints, while disallowing access to other endpoints when configuring auth proxy in front of VictoriaMetrics components.
- Set reasonable [`Strict-Transport-Security`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security) header value to all the components to mitigate [MitM attacks](https://en.wikipedia.org/wiki/Man-in-the-middle_attack), for example: `max-age=31536000; includeSubDomains`. See `-http.header.hsts` flag.
- Set reasonable [`Content-Security-Policy`](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) header value to mitigate [XSS attacks](https://en.wikipedia.org/wiki/Cross-site_scripting). See `-http.header.csp` flag.
- Set reasonable [`X-Frame-Options`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options) header value to mitigate [clickjacking attacks](https://en.wikipedia.org/wiki/Clickjacking), for example `DENY`. See `-http.header.frameOptions` flag.
VictoriaMetrics provides the following security-related command-line flags:

4
lib/httpserver/httpserver.go
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@ -53,9 +53,9 @@ var (
idleConnTimeout = flag.Duration("http.idleConnTimeout", time.Minute, "Timeout for incoming idle http connections")
connTimeout = flag.Duration("http.connTimeout", 2*time.Minute, `Incoming http connections are closed after the configured timeout. This may help to spread the incoming load among a cluster of services behind a load balancer. Please note that the real timeout may be bigger by up to 10% as a protection against the thundering herd problem`)
headerHSTS = flag.String("http.header.hsts", "", "Value for 'Strict-Transport-Security' header")
headerHSTS = flag.String("http.header.hsts", "", "Value for 'Strict-Transport-Security' header, recommended: `max-age=31536000; includeSubDomains`")
headerFrameOptions = flag.String("http.header.frameOptions", "", "Value for 'X-Frame-Options' header")
headerCSP = flag.String("http.header.csp", "", "Value for 'Content-Security-Policy' header")
headerCSP = flag.String("http.header.csp", "", "Value for 'Content-Security-Policy' header, recommended: `default-src 'self'`")
)
var (