imported>SMcCandlish: Update; fix circularity; spelling; link to key concepts; not really an appropriate use of "such as" which is used for listing some examples, not providing key information; fix "or" vs. "and" confusion; protocols and software packages are generally proper names (the lowercase version may be the name of a nx command in the package but is not the name of the package).

2024-12-23T01:00:56Z

Update; fix circularity; spelling; link to key concepts; not really an appropriate use of "such as" which is used for listing some examples, not providing key information; fix "or" vs. "and" confusion; protocols and software packages are generally proper names (the lowercase version may be the name of a *n*x command in the package but is not the name of the package).

New page

{{Short description|Network filesystem protocol}}
{{More citations needed|date=May 2017}}
'''YANFS''' ('''Yet Another NFS'''), formerly '''WebNFS''', is an extension to the [[Network File System]] (NFS) for allowing clients to access a [[file system]] over the internet using a simplified, firewall-friendly protocol.

WebNFS was developed to give [[Java applet]]s and other internet enabled applications a way of accessing filesystem services over the internet. While NFS provides applications on [[Unix]] with full filesystem semantics, not all of these might be needed in a distributed, read-only web environment. Conversely, access restrictions—such as requiring the use of restricted ports for originating requests—normally used in closed environments are not usually applicable in public distributed environments.

In 2007, [[Sun Microsystems]] [[Open source|open-sourced]] its WebNFS implementation. The name was subsequently changed to YANFS (Yet Another NFS) to reflect the expanded scope of the project to include a server-side implementation.<ref>{{cite web |url=https://blogs.oracle.com/shepler/entry/yanfs_is_the_new_webnfs |title=YANFS is the new WebNFS (And is opensource as well) |last=Shepler |first=Spencer |department=theShepler |work=Blogs.Oracle.com |access-date=2012-02-15 |url-status=dead |archive-url=https://web.archive.org/web/20120103134830/http://blogs.oracle.com/shepler/entry/yanfs_is_the_new_webnfs |archive-date=2012-01-03}}</ref>

YANFS/WebNFS makes use of a well known port (port 2049 on both [[User Datagram Protocol|UDP]] and [[Transmission Control Protocol|TCP]]) thus avoiding the overhead and unpredictability of using the [[Open Network Computing Remote Procedure Call|ONC RPC]] [[portmap]] protocol. WebNFS adds public filehandles and multicomponent lookups to the NFS protocol.

WebNFS has been specified by a number of RFCs:
* {{IETF RFC|2054}}: WebNFS Client
* {{IETF RFC|2055}}: WebNFS Server
* {{IETF RFC|2224}}: NFS URL Scheme
* {{IETF RFC|2755}}: Security negotiation for WebNFS

==Legacy==
While WebNFS itself did not gain much traction, several important WebNFS features later became part of NFSv4, including use of port 2049, and the concept of a fixed "root filehandle" (which evolved from WebNFS public filehandles and allows exported filesystems to be accessed without needing the MOUNT protocol to learn their individual root handles first); both together allow NFSv4 to function without the Portmap service.

==References==
{{Reflist}}

==External links==
* [https://web.archive.org/web/20120922084738/http://java.net/projects/yanfs YANFS website]

[[Category:Internet protocols]]
[[Category:Network file systems]]
[[Category:Internet Protocol based network software]]
[[Category:Unix file system-related software]]
[[Category:Application layer protocols]]

WebNFS - Revision history