forward2reverse

forward2reverse is a Ruby script for converting A and AAAA (forward DNS) records to PTR (reverse DNS) records. It can read zone files as input, and will ignore lines which don't contain A or AAAA DNS records.

Example Usage

1. Convert a single A record:

    echo "example.com. A 1.2.3.4" | forward2reverse
   

2. Convert a list of A and/or AAAA records listed in a file. Other record types will be ignored:

    cat zone-file | forward2reverse
   

Installation

1. Verify that you have Ruby 1.9.3 (released October 2011) or later installed:

    ruby --version
   

   Earlier versions may also work, but are untested.

2. Download and extract the tarball:

    wget https://github.com/mrideout/forward2reverse/archive/v0.1.tar.gz
    tar -xzf v0.1.tar.gz
    cd forward2reverse-0.1
   

3. Make forward2reverse executable:

    chmod 755 forward2reverse
   

4. Optionally, move forward2reverse into a directory that's in your PATH. For example:

    sudo mv forward2reverse /usr/local/bin/
   

Contributing

1. Fork it!

2. Create your feature branch:

    git checkout -b my-new-feature
   

3. Commit your changes:

    git commit -a -m 'Add some feature'
   

4. Push to the branch:

    git push origin my-new-feature
   

5. Submit a pull request.

History

Matt Rideout wrote and released forward2reverse in May 2015.

License

forward2reverse is open source software released under the MIT License.