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Merge branch '31049-pages-domains-should-be-added-to-publicsuffix-org-docs' into 'master'

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Resolve "HackerOne reported issue: Cookie bomb vulnerability in Pages"

Closes #31049

See merge request gitlab-org/gitlab-ce!17123
This commit is contained in:
Grzegorz Bizon 2018-02-15 12:28:29 +00:00
commit 6d70a62a61
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doc/administration/pages/index.md
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@ -61,6 +61,21 @@ Before proceeding with the Pages configuration, you will need to:
NOTE: **Note:**
If your GitLab instance and the Pages daemon are deployed in a private network or behind a firewall, your GitLab Pages websites will only be accessible to devices/users that have access to the private network.
### Add the domain to the Public Suffix List
The [Public Suffix List](https://publicsuffix.org) is used by browsers to
decide how to treat subdomains. If your GitLab instance allows members of the
public to create GitLab Pages sites, it also allows those users to create
subdomains on the pages domain (`example.io`). Adding the domain to the Public
Suffix List prevents browsers from accepting
[supercookies](https://en.wikipedia.org/wiki/HTTP_cookie#Supercookie),
among other things.
Follow [these instructions](https://publicsuffix.org/submit/) to submit your
GitLab Pages subdomain. For instance, if your domain is `example.io`, you should
request that `*.example.io` is added to the Public Suffix List. GitLab.com
added `*.gitlab.io` [in 2016](https://gitlab.com/gitlab-com/infrastructure/issues/230).
### DNS configuration
GitLab Pages expect to run on their own virtual host. In your DNS server/provider