Hi! We are glad to announce a new round in the Netfilter Workshop series. This year this event will take place in Malaga, Spain, from 9th July to 12th July, 2019 [1]. The event will be hosted by University of Malaga, at the School of Computer Science Engineering (Teatinos Campus). The Netfilter Workshop (NFWS) is the main event organized for and by the Netfilter community. During the workshop days, Linux kernel networking and Netfilter developers meet and discuss the status of the on-going Netfilter-related developments and the plans for the near future. Attendance requires an invitation. Linux networking developers with contributions to any of the Netfilter subsystems and users with interesting usecases and open problems are also welcome. We have traditionally left room for other projects that rely on Netfilter infrastructure such as the Linux Virtual Server project. You can send us proposal in a very lightweight format: title and quick abstract (not more than 500 words!) as well as estimated time to present. We are looking for sponsors, if you think you can help us to get funds to run the workshop, please, contact us at coreteam@netfilter and we'll be glad to send you our sponsorship policy. Join us! P.S. This edition is a bit special for us since we will be celebrating 20 years since this project was started by Paul "Rusty" Russell [2]. [1] http://workshop.netfilter.org/2019/ [2] https://www.youtube.com/watch?v=e8Vv3gB1LkI