# Web

* [HAProxy Health Check](#haproxy-health-check)
* [Squid - caching HTTP, HTTPS, FTP, and more](#squid---caching-http-https-ftp-and-more)
* [Debugging](#debugging)
* [SNI](#sni)
* [Varnish](#varnish)
  * [Real IP](#real-ip)
* [Google Analytics](#google-analytics)
  * [Enhanced Link Attribution](#enhanced-link-attribution)

## HAProxy Health Check

<https://www.haproxy.com/documentation/aloha/7-0/haproxy/healthchecks/#checking-a-http-service>

## Squid - caching HTTP, HTTPS, FTP, and more

<http://www.squid-cache.org>

## Debugging

<https://mitmproxy.org/\\>
allows traffic flows to be intercepted, inspected, modified and replayed.

## SNI

Server Name Indication (SNI) is an extension to the TLS\
allows a server to present multiple certificates on the same IP address and TCP port number\
Wiki: <https://en.wikipedia.org/wiki/Server\\_Name\\_Indication>

## Varnish

<https://hub.docker.com/r/centos/varnish-4-centos7/\\>
<https://access.redhat.com/containers/?tab=overview#/search/varnish>

### Real IP

<https://support.cloudflare.com/hc/en-us/articles/200170986>

<https://support.cloudflare.com/hc/en-us/articles/200170706-How-do-I-restore-original-visitor-IP-with-Nginx->

## Google Analytics

<https://analytics.google.com/analytics/web/#/.../admin/property/settings>

### Enhanced Link Attribution

all links for which you want enhanced click attribution should have an ID attribute


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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
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```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.