>Number:         10986
>Category:       bin
>Synopsis:       mount_nfs doesn't fallback to IPv4
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Sep 10 22:34:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        kernel is a few days ago -current,
>Organization:
	
>Environment:
	
System: NetBSD renoir.sat.t.u-tokyo.ac.jp 1.5E NetBSD 1.5E (RENOIR.MP) #0: Fri Sep 8 15:30:54 JST 2000 iwamoto@een.sat.t.u-tokyo.ac.jp:/export/home/iwamoto/syssrc/sys/arch/i386/compile/RENOIR.MP i386


>Description:
	mount_nfs doesn't fallback to IPv4 operation when IPv6 nfs mount
	is not available.
>How-To-Repeat:
	Prepare a host with an IPv6 DNS record which is
	1) a FreeBSD box running 4.1-STABLE something
	2) a NetBSD box which denys IPv6 RPC requests by libwrap
	  (This can be achieved by disabling DNS reverse lookups or
	   explicitly writing hosts.{allow,deny}.)
>Fix:
	Not provided.
	It might be a good idea to have -4/-6 options which explicitly
	selects IPv4/IPv6 connections.
>Release-Note:
>Audit-Trail:
>Unformatted:
 	userland is from 1.5 branch of the same date.