DNS Privacy Project

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Git repository

Patches are available here: https://portal.sinodun.com/stash/projects/TDNS/repos/dns-over-tls_patches/browse

STARTTLS is DNS is no longer described in any active draft, but is still available in these patches.

TFO patches

Various TFO patches are provided - please see the TFO patch repository.

LDNS:  ldns.1.6.17_dns-over-tls.patch

Since this patches use TLS v1.2 a recent version of OpenSSL is required.

Features

  • Adds -F option to read multiple message files from a directory.
  • Adds -R option to re-use TCP/TLS connections when possible.
  • Adds -l option to do TLS on a dedicated TLS port.
  • Adds -C option to do STARTTLS (no TO bit) (experimental).
  • Adds -L option to do STARTTLS (with TO bit) (experimental).
  • Adds -P option to prevent failed STARTTLS negotiation falling back to TCP.
  • Adds experimental support for TCP Fast open (linux only). Enable with --enable-tcp-fastopen configure option.

Installation

  1. apply patch
  2. run 'autoreconf --force'
  3. additionally specify the '--with-ssl' and --with-tls' flags when running 'configure'
  4. optionally specify the --enable-tcp-fastopen when running 'configure'
  5. make, make install

Unbound: unbound-1.5.1_t-dns.patch

Features

  • Add support for DNS-over-TLS (experimental) to Unbound as a server and a client. 
    • Adds new configuration file options:
      • 'do-starttls:             yes/no'                   # enable STARTTLS for downstream queries
      • 'starttls-upsteam' : yes/no                    # enable STARTTLS for upstream queries
      • 'starttls-delay':       number of second  # time to cache the STARTTLS capability of an upstream server before retrying a  STARTTLS negotiation
    • Adds option to use the TO bit for STARTTLS downstream. Enable with --enable-TObit configure option.
    • Adds new statistics counters: SSL queries, EDNS_TO queries and STARTTLS queries
  • Initial attempt to change behaviour of writes over SSL so that the DNS message is sent in a single packet when possible. (Previous behaviour was to send the length and message content separately.) Should be improved to avoid malloc on each write.
  • Adds experimental client and server support for TCP Fast open (linux only). Enable with --enable-tcp-fastopen configure option.

Installation

  1. apply patch
  2. run 'autoreconf --force'
  3. optionally specify the --enable-tcp-fastopen  and/or --enable-TObit flags and when running 'configure'
  4. make, make install

NSD: nsd-4.1.0_dns-over-tls.patch

Features

  • Implement a TLS service on a dedicated TLS port 
    • Adds new options in configuration file: 
      • 'tls-service-key:   <path_to_key_file>
      • 'tls-service-pem: <path_to_pem_file>'
      • tls-port:                <port for TLS service> 
  • Add support for DNS-over-TLS (experimental). 
    • Adds new configuration file options:
      • 'do-starttls:             yes/no'                   # enable STARTTLS
    • Adds option to use the TO bit for STARTTLS. Enable with --enable-TObit configure option.
  • Initial attempt to change behaviour of writes over SSL so that the DNS message is sent in a single packet when possible. (Previous behaviour was to send the length and message content separately.) Should be improved to avoid malloc on each write.
  • Adds experimental server support for TCP Fast open (linux only). Enable with --enable-tcp-fastopen configure option.

Installation

  1. apply patch
  2. run 'autoreconf --force'
  3. optionally specify the --enable-tcp-fastopen  and/or --enable-TObit flags and when running 'configure'
  4. make, make install
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