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WebNFS
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<p>YANFS (Yet Another NFS), formerly WebNFS, is an extension to the <a href="/facts/Network_File_System/jWRRALVo">Network File System</a> (NFS) for allowing clients to access a <a href="/facts/File_system/FdPm90uc">file system</a> over the internet using a simplified, firewall-friendly protocol. </p><p>WebNFS was developed to give <a href="/facts/Java_applet/oulP2dyy">Java applets</a> and other internet enabled applications a way of accessing filesystem services over the internet. While NFS provides applications on <a href="/facts/Unix/0pNL2seI">Unix</a> 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. </p><p>In 2007, <a href="/facts/Sun_Microsystems/VJ9EzEFd">Sun Microsystems</a> <a href="/facts/Open_source/7X9rCdz4">open-sourced</a> 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. </p><p>YANFS/WebNFS makes use of a well known port (port 2049 on both <a href="/facts/User_Datagram_Protocol/dxLU0D6q">UDP</a> and <a href="/facts/Transmission_Control_Protocol/WW4sPrt9">TCP</a>) thus avoiding the overhead and unpredictability of using the <a href="/facts/Open_Network_Computing_Remote_Procedure_Call/oSR4C7hH">ONC RPC</a> <a href="/facts/Portmap/Wa4SAUle">portmap</a> protocol. WebNFS adds public filehandles and multicomponent lookups to the NFS protocol. </p><p>WebNFS has been specified by a number of RFCs: </p> <ul><li><a href="/facts/RFC_(identifier)/esftTvE7">RFC</a> <a href="https://www.rfc-editor.org/rfc/rfc2054">2054</a>: WebNFS Client</li> <li><a href="/facts/RFC_(identifier)/esftTvE7">RFC</a> <a href="https://www.rfc-editor.org/rfc/rfc2055">2055</a>: WebNFS Server</li> <li><a href="/facts/RFC_(identifier)/esftTvE7">RFC</a> <a href="https://www.rfc-editor.org/rfc/rfc2224">2224</a>: NFS URL Scheme</li> <li><a href="/facts/RFC_(identifier)/esftTvE7">RFC</a> <a href="https://www.rfc-editor.org/rfc/rfc2755">2755</a>: Security negotiation for WebNFS</li></ul>