By Luuk Hendriks The XDP programs we’ve so far described in this series have been actively modifying DNS packets to perform functions such as response rate limiting (RRL), cookies and padding. This time, we’ll look into a passive BPF-program which enables us to plot graphs of DNS metrics

By Willem Toorop In our previous post on using eXpress Data Path (XDP) for DNS, we discussed how a new XDP rate-limiting queries feature can augment a DNS service running in user space (with common DNS software) to deal with denial of service (DoS) attacks. Journeying into XDP: Part 0Network

How can eXpress Data Path (XDP) augment existing DNS software? We share our experiences of implementing Response Rate Limiting in XDP.

Network programming using XDP has been on our radar for a while now. As tooling around this technology has vastly improved, we decided that it was time to finally get our hands dirty and see what this technology is all about.