Zephyr (protocol)
| application | zephyr | ||||
| transport | UDP | ||||
| Internet | IP ( IPv4 , IPv6 ) | ||||
| Network access | Ethernet |
Token bus |
Token ring |
FDDI | ... |
Zephyr was part of Project Athena (1983-1991) and was at the Massachusetts Institute of Technology (MIT) as an instant messaging - protocol and the associated application program package with strong Unix developed -Background. In keeping with the Unix philosophy “Write computer programs so that they only do one task and do it well”, it was divided into several programs that together form a complete system for exchanging messages.
Zephyr is still used today in some university settings such as Carnegie Mellon University , Iowa State University , Stanford University , University of Maryland, College Park , Brown University , North Carolina State University, and MIT it has for the most part been replaced by modern and more popular instant messaging systems such as AIM and XMPP .
Zephyr sends UDP data packets via ports 2102, 2103 and 2104. The protocol is incompatible with most routers in NAT mode, as it only forwards the internal IP address of the local network to the call partner and therefore the response data packets are incorrect can be routed. For authentication Zephyr uses the Kerberos protocol. There are Debian packages with support for Kerberos 5.
Web links
- The 1988 Usenix paper on Zephyr (PDF; 37 kB)