http://www.rfc-editor.org/rfc/rfc5426.txt
RFC 5426: Transmission of Syslog Messages over UDP, A. Okmianski2009-03-01T23:00:00-00:00This document describes the transport for syslog messages over UDP/ IPv4 or UDP/IPv6. The syslog protocol layered architecture provides for support of any number of transport mappings. However, for interoperability purposes, syslog protocol implementers are required to support this transport mapping. [STANDARDS-TRACK]