Dear NLNOGers, We recently kickstarted a small effort to create a repository of guidance on developing sane BGP filters. http://bgpfilterguide.nlnog.net/guides/ The goal is to provide a go-to place which will help you develop a comprehensive route filtering policy tailored to your specific context. The guide is not meant as "blindly copy+paste this", but it should provide you with sufficient guidance to help you create your own filters. Afterall, each network operates in autonomy and will have their own considerations. The filtering guide is in its early stages: there is work to be done to improve the readability and internal consistency, and additional topics and aspects need to be added. If you want to contribute, just submit a pull-request via https://github.com/nlnog/bgpfilterguide . The guides themselves are simple markdown files as is visible here https://github.com/NLNOG/bgpfilterguide/tree/master/guides In case you identify an area which is not yet covered by one of the guides please consider opening a 'github issue' at https://github.com/nlnog/bgpfilterguide/issues so someone else can consider writing the guide. The entire project is hosted on github and using github's jekyll service for publication. So if you clone the repository you have everything it is. Please consider contributing in the following areas: - add new guides or extend use cases - readability improvements - open issues on topics that need to be addressed I'd like to thank Erik Bais for proposing and contributing to this initiative. Kind regards, Job