You can try http://www.grid.net.ru/nginx/udplog.en.html (no idea if that still compiles with the newer nginx versions). You might also contact Valery Kholodkov directly - he has written few new modules http://www.nginxguts.com/2012/08/better-logging-for-nginx/ (then again those links provided are broken atm so not sure about the status of those). rr