# Do's and dont's for (ab)using the DNS


So you want to (ab)use the DNS for your usecase?

Here are some do's and dont's.
For those inclined here is some background documentation on this subject:

* <http://tools.ietf.org/html/rfc5507>
* <http://tools.ietf.org/html/rfc6950>
* <http://tools.ietf.org/html/rfc5395>

# Do not

* Invent your own new TLDs. If you must, use something like `.local`, or `.home`, or 
    use a domain *that you actually own*;
* Use the `TXT` RR to cram it with your stuff (like the `SPF` guys did);
* Store large data blobs in the DNS;
* Use a new DNS class.

# Do

* Reuse existing RR types, there are some weird ones out there that might suite
    your use case, like `NAPTR`, or the well supported `SRV` record.
* Register a new RR type if you think you'll need one. Fill out the 
     [template](http://tools.ietf.org/html/rfc5395#appendix-A) detailing
     the new RR. 
* Store small data blobs in the DNS. Let them point to services where you can retrieve the
     data you'll need.