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Old 10-04-2013, 02:42 PM   #1
zLinux12
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NFS export insecure option - can port snooping show reason to use?


Hello,

I tried to mount a RH Linux 6.2 NFS share to OMVS on
Mainframe.
Would not mount and no clear error message on OMVS.

Turns out Linux required "insecure" export option to
mount on OMVS.
Seems OMVS uses ports above 1024 for NFS and Linux
ports below 1024.

I did not see any errors in /var/log/messages on Linux.

Is there a way to snoop these ports on Linux, to
determine if this option is needed?

Thanks
Joe
 
Old 10-04-2013, 03:01 PM   #2
lleb
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you can always set NFS to export at specific ports. also what vs of NFS is OMVS using?
 
Old 10-04-2013, 03:54 PM   #3
zLinux12
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Hello,

Exact version of NFS OMVS runs is unclear. Based on z/OS 1.13 release.

IBM states ports it uses cannot be over ridden, so looking more at tracing error from
Linux side( RH 6.2 ), if possible. SUN Solaris has "snoop", not sure what Linux offers
for this.
Any suggestions?
Thanks
Joe
 
Old 10-04-2013, 06:08 PM   #4
jpollard
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It almost sounds like NFSv2. NFS v4 uses 2049
 
Old 10-04-2013, 06:42 PM   #5
lleb
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Quote:
Originally Posted by zLinux12 View Post
Hello,

Exact version of NFS OMVS runs is unclear. Based on z/OS 1.13 release.

IBM states ports it uses cannot be over ridden, so looking more at tracing error from
Linux side( RH 6.2 ), if possible. SUN Solaris has "snoop", not sure what Linux offers
for this.
Any suggestions?
Thanks
Joe
who cares what IBM says if NFS is hosted on RHEL. unless i read this completely backwards, as long as the /etc/export is on RHEL, then again you can change the ports.

if it is the other way, then RHEL will not care what port(s) NFS is hosted on as long as you can see the port and connect your set. if you are running a much older vs of NFS on the other OS, then you should upgrade. if you can not... it might be a good idea to move the NFS share off of the much older server onto something much newer.

um, when you say RedHat 6.2 are you referring to RHEL 6.2 or are you talking about RedHat Linux 6.2?

If you are talking RedHat Linux, then you need to upgrade that as its been out of support for over 10 years.

Last edited by lleb; 10-04-2013 at 06:52 PM.
 
Old 10-07-2013, 09:40 AM   #6
zLinux12
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Thanks very much for your response. Sounds like there is more I need to research.

Joe
 
  


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