Domainnamen, DNS-Einträge und Zertifikate für eine Website

Introduction

Websites are usually given human-readable names like www.example.com. A so-called DNS record is necessary to map a human-readable website name to a certain computer. This mapping is done by one of the many DNS servers found across the web.

The following conditions must be met so that your website is accessible online:

1. DNS records for the website name (and its aliases, if applicable) must exist (configured by LRZ DNS team).
2. The DNS records must point to the correct webserver daemon pool (configured by LRZ DNS team).
3. All website names must be configured on the webserver that delivers the website (configured by LRZ web hosting team).

Tasks 1 and 2 are handled by the LRZ DNS team, whereas the third action is done by the LRZ web hosting team.

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How to obtain a domain name for your website

Choosing a website name

When choosing a domain name for your website, you will usually not have complete creative freedom, but will have to adhere to certain regulations set by your respective organisation. In addition, it is usually necessary for the names to be explicitly approved by your institution.

Special case: Website name using a non-standard domain

It is possible to use a domain name with a so-called non-standard domain, but please be aware that there will be a few hurdles to overcome:

• It will always have to be explicitly approved by your organisation.
• Obtaining a non-standard domain will take time and usually money. On the other hand, choosing a subdomain from the list of standard domains comes at no additional charge.
• Non-standard domain websites are not automatically added to our server certificate, but requires additional steps.

A. The domain is registered with the LRZ

If the domain name has been requested via the LRZ, or has been transfered to LRZ, you do not need to to anything further. Inclusion in our certificate is done in a documented process. Since many steps, people, institutions and interfaces are involved, it can a while.

B. The domain is registered externally

Consider a domain transfer to LRZ, so that "A" applies.

If this is not possible follow  instructions in "Case 2: Your domain ist hosted elsewhere".

Creation of the DNS records

If your domain is hosted by an external provider or your local organisation (e.g. your faculty/school), please ask them to create the necessary DNS records or change them. In some cases, the DNS records will be created together with informing you about their approval, removing the need for you to explicitly ask for their creation.

If the above does not apply to your case, please contact the LRZ DNS team via the LRZ Servicedesk and send them the following information:

• Your (future) website's domain name and aliases (if applicable)
• Informal proof that the desired domain name has been approved (e.g. by forwarding the CIO's email)
• Organisation your website belongs to (LMU, TUM, or other organisation within the Münchner Wissenschaftsnetz/MWN)
• The web server pool's IP address that the domain name shall point to (see below)

If possible, the DNS record should be made in the form of an alias to the pool's CNAME (CNAME record). However, in some instances the pool's IP address has to be used instead of its CNAME (A record or AAAA record). For more technical background information see these three articles on Wikipedia: CNAME record, A record, and AAAA record.

IP addresses for our web server pools

The table below shows the CNAMEs and IP addresses (IPv4 and IPv6) of our web server daemon pools for our serviced web hosting service.