Documentation/security: Fix links about tls keygen.

Edit to replace a relative link (won't work with that target) with
an absolute link.
Heading 1 Title Case.
Polish graf 3.

Fixes https://github.com/coreos/docs/issues/662
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Josh Wood 2015-11-09 15:43:41 -08:00
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# security model
# Security Model
etcd supports SSL/TLS as well as authentication through client certificates, both for clients to server as well as peer (server to server / cluster) communication.
To get up and running you first need to have a CA certificate and a signed key pair for one member. It is recommended to create and sign a new key pair for every member in a cluster.
For convenience the [cfssl](https://github.com/cloudflare/cfssl) tool provides an easy interface to certificate generation, and we provide a full example using the tool at [here](../hack/tls-setup). Alternatively this site provides a good reference on how to generate self-signed key pairs:
http://www.g-loaded.eu/2005/11/10/be-your-own-ca/
For convenience, the [cfssl](https://github.com/cloudflare/cfssl) tool provides an easy interface to certificate generation, and we provide an example using the tool [here](https://github.com/coreos/etcd/tree/master/hack/tls-setup). You can also examine this [alternative guide to generating self-signed key pairs](http://www.g-loaded.eu/2005/11/10/be-your-own-ca/).
## Basic setup