[GTALUG] Old DOS NFS client won't talk to Linux NFS server
John Sellens
jsellens at syonex.com
Tue Jun 28 17:33:04 EDT 2022
I was all set to say "well, obviously", but ...
On my ubuntu desktop, nfs(5) tells me that mount.nfs(8) will
take an nfsvers=2 option.
I wonder if your desktop did the mount with the default version 4?
Did you try forcing a mount from your desktop with nfsvers=2?
My man pages seemed to suggest that mountd was only needed for
NFS 2 and 3 - could there be firewall settings on your embedded
NFS server blocking some traffic from the DOS client?
The PROGRAM_NOT_AVAILABLE makes me wonder if the portmapper lookup
by the DOS client didn't find what it wanted, or was blocked?
It looks like your server is listening both tcp and udp which is likely good.
Hope that's helpful ...
John
On Tue, 2022/06/28 04:11:57PM -0400, Kevin Cozens via talk <talk at gtalug.org> wrote:
| Greetings, all.
|
| I'm wondering if someone may have some insight in to an NFS related problem.
|
| I have an embedded system running Linux. I set it as an NFS server. I have
| been able to have the server mount its own share and I have also been able
| to mount the share on my desktop. That tells me the NFS configuration is
| fundamentally working.
|
| The problem is when I try to mount the from an old industrial system running
| Hummingbird NFS Maestro DOS based software from 1997. That system is able to
| ping the server so I know it has a network connection. However, when the
| "nfs link Z: \\192.168.100.110\/share" command is issue I just get the
| message on the server saying "No response from server".
|
| The Linux NFS server is supposed to support NFS v2 through v4. The old
| system is probably v3 at best and the logs only seem to indicate v2. I
| haven't figured out how to disable v4 support on the NFS server. I used
| tshark to capture the NFS traffic.
|
| When the "exports" command was issued on the old machine:
|
| 909 873.726802357 192.168.100.101 → 192.168.100.110 Portmap 98 V2 GETPORT
| Call MOUNT(100005) V:1 UDP
| 910 873.727576161 192.168.100.110 → 192.168.100.101 Portmap 70 V2 GETPORT
| Reply (Call In 909) Port:53625
| 911 873.728326009 192.168.100.101 → 192.168.100.110 MOUNT 110 V1 EXPORT Call
| 912 873.731315731 192.168.100.110 → 192.168.100.101 MOUNT 142 V1 EXPORT
| Reply (Call In 911)
|
|
| When the "nfs link" command was issued on the old machine:
|
| 915 929.199301001 192.168.100.101 → 192.168.100.110 Portmap 98 V2 GETPORT
| Call HCLNFSD(788585389) V:1 UDP
| 916 929.199993392 192.168.100.110 → 192.168.100.101 Portmap 70 V2 GETPORT
| Reply (Call In 915) PROGRAM_NOT_AVAILABLE
| 917 929.200757113 192.168.100.101 → 192.168.100.110 Portmap 98 [RPC
| retransmission of #915]V2 GETPORT Call (Reply In 916) HCLNFSD(788585389) V:1
| UDP
| 918 929.201092226 192.168.100.110 → 192.168.100.101 Portmap 70 [RPC
| duplicate of #916]V2 GETPORT Reply (Call In 915) PROGRAM_NOT_AVAILABLE
| 919 929.201744034 192.168.100.101 → 192.168.100.110 Portmap 98 [RPC
| retransmission of #915]V2 GETPORT Call (Reply In 916) PCNFSD(150001) V:2 UDP
|
|
| The output from rpcinfo is:
|
| $ rpcinfo -p
| program vers proto port service
| 100000 4 tcp 111 portmapper
| 100000 3 tcp 111 portmapper
| 100000 2 tcp 111 portmapper
| 100000 4 udp 111 portmapper
| 100000 3 udp 111 portmapper
| 100000 2 udp 111 portmapper
| 100024 1 udp 57318 status
| 100024 1 tcp 46225 status
| 100005 1 udp 53625 mountd
| 100005 1 tcp 40199 mountd
| 100005 2 udp 53980 mountd
| 100005 2 tcp 53443 mountd
| 100005 3 udp 50848 mountd
| 100005 3 tcp 49067 mountd
| 100003 2 tcp 2049 nfs
| 100003 3 tcp 2049 nfs
| 100003 4 tcp 2049 nfs
| 100227 2 tcp 2049
| 100227 3 tcp 2049
| 100003 2 udp 2049 nfs
| 100003 3 udp 2049 nfs
| 100227 2 udp 2049
| 100227 3 udp 2049
| 100021 1 udp 42943 nlockmgr
| 100021 3 udp 42943 nlockmgr
| 100021 4 udp 42943 nlockmgr
| 100021 1 tcp 44539 nlockmgr
| 100021 3 tcp 44539 nlockmgr
| 100021 4 tcp 44539 nlockmgr
|
|
| Is the DOS based NFS client compatible with current day Linux NFS server?
| Any idea why I see messages saying PROGRAM_NOT_AVAILABLE?
| If something is supposedly missing, what program is it looking for? It would
| have been a lot more helpful if whatever program is reporting a "missing
| program" said what program it couldn't find, or couldn't talk to.
|
| --
| Cheers!
|
| Kevin.
|
| http://www.ve3syb.ca/ | "Nerds make the shiny things that
| https://www.patreon.com/KevinCozens | distract the mouth-breathers, and
| | that's why we're powerful"
| Owner of Elecraft K2 #2172 |
| #include <disclaimer/favourite> | --Chris Hardwick
| ---
| Post to this mailing list talk at gtalug.org
| Unsubscribe from this mailing list https://gtalug.org/mailman/listinfo/talk
More information about the talk
mailing list