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<== Date ==> <== Thread ==>

Subject: Re: about NFS
From: "Billy R. Adams" <B.R.Adams@larc.nasa.gov>
To: zhaozhuo <zhaozhuo@ihep.ac.cn>
Cc: tech-talk <tech-talk@aps.anl.gov>
Date: Fri, 29 Aug 2003 10:49:16 -0400
zhaozhuo,

    Redhat 9.0 has very tight security features.
Until you isolate the problem:
1. Try temporarily turn set security level to off.
2. Try temporarily removing /etc/hosts.allow and
   hosts.deny.
Then try:
3. Make sure that nfs is set to automatically start
   on bootup:  (you need nfslock as well as nfs)
   > chkconfig --list | grep nfs
   nfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off
   nfslock         0:off   1:off   2:on    3:on    4:on    5:on    6:off
4. Make sure that portmap is set to automatically start
   on bootup:
    > chkconfig --list | grep portmap
    portmap         0:off   1:off   2:off   3:on    4:on    5:on    6:off

     Attached are my notes on NFS mounting.
======================================================================
Mounting NFS Files     July 25, 2003     b.r.adams@larc.nasa.gov
Redhat Linux 9.0
======================================================================

======================================================================
Mounting NFS Files Errors:
======================================================================

Must have network connection:
  [root@bra-pc etc]# mount xcelsior:/home0 /mnt
  mount: RPC: Remote system error - No route to host

hostnames must be on the same network.
  [root@bra-pc etc]# mount xcelsior-2:/home0 /mnt
  mount: RPC: Timed out


  [root@bra-pc-20 root]# mount bra-pc-2:/home0 /mnt
  mount: RPC: Remote system error - Connection refused


  xcelsior ~/ > runas mount xcelsior:/home0 /mnt/floppy
  mount: xcelsior:/home0 failed, reason given by server: Permission denied
  xcelsior ~/ >



======================================================================
REQUIREMENTS for EXPORTING and MOUNTING FILE SYSTEMS
     NFS must be installed.
     hosts must be on the same network (No routing).
======================================================================

On host that is EXPORTING file system/s:

/etc/hosts.allow
        Example:
        portmap: 192.168.14.220, 192.168.14.221, 192.168.14.222: ALLOW
or
        No /etc/hosts.allow & No /etc/hosts.deny


Security Level
        [
        High
        Customize
        Trusted Devices: eth0   (192.168.14.x) or Ethernet Port used.
        ]
or
        [No firewall]

> chkconfig --list | grep portmap
portmap         0:off   1:off   2:off   3:on    4:on    5:on    6:off

> chkconfig --list | grep nfs
nfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off
nfslock         0:off   1:off   2:on    3:on    4:on    5:on    6:off




======================================================================

On host that is MOUNTING file system/s:

Security Level
        [
        High
        Customize
        Trusted Devices: eth0   (192.168.14.x) or Ethernet Port used.
        ]
or
        [No firewall]

> chkconfig --list | grep portmap
portmap         0:off   1:off   2:off   3:on    4:on    5:on    6:off

> chkconfig --list | grep nfs
nfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off
nfslock         0:off   1:off   2:on    3:on    4:on    5:on    6:off




======================================================================

Billy


zhaozhuo wrote:
> hi,everyone!
> I want to share the directory "/export/home/zhaozhuo/medmtest" on the 
> SUN Workstation/Solaris8 for a PC/Red Hat Linux9.
> SUN Workstation's name         aa (Server)
> PC's name                      bb (Client)
>  
> So i do the following:
> 1.on aa
> share -F nfs -o ro=bb /export/home/zhaozhuo/medmtest
> 2.on bb
> mount -t nfs aa:/export/home/zhaozhuo/medmtest /home21
>  
> but it shows the errors:
>  
> mount:RPC:Timed out
>  
> I've run the command "/etc/rc.d/init.d/nfs start" and I also checked the 
> "nfsd" state by "ps -ed|grep nfsd.
> it shows the following:
> root       3285   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3286   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3287   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3288   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3289   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3290   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3291   1 0 Aug28 ?   00:00:00 [nfsd]
> root       3292   1 0 Aug28 ?   00:00:00 [nfsd]
>  
>  
> I don't know what's the reason,who can help me?
>  
>  
>  
>  

-- 
Billy Adams    <mailto:b.r.adams@larc.nasa.gov>
                Raytheon Technical Services
  Assigned to:  Research Facilities Branch of
                Research Facilities Management Office
  16 Victory Street Mail Stop 413
  Building 1251, Room 126D
  NASA Langley Research Center
  Hampton, Va. 23681-2199
  Phone 1-757-864-6242     Fax   1-757-864-8095



References:
about NFS zhaozhuo

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