Source port on AIX for NAS is same? Post: 303018982

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Operating Systems AIX Source port on AIX for NAS is same? Post 303018982 by anil1000 on Wednesday 20th of June 2018 02:03:11 PM

06-20-2018

Registered User

Quote:

Originally Posted by Scrutinizer

It seems to me your problem is because of the firewall in between that is interfering with NFS communication. I think that the reason that you are having more problems with nfs_use_reserved_ports=1 is that there are fewer ports in the pool and you are therefore more likely to reuse a port that the Netapp SVM thinks is still in use. It thinks this can happen when the firewall interferes with normal communication and therefore the Netapp SVM has not learned that a port is no longer in use.

The firewall is probably configured to drop, rather than reject packets, so that is something that you could look into. Another thing to investigate is keep-alive signals and timeouts, to ensure that the firewall does not interfere..

That being said, it may be that your particular brand just does not work well with NFS, no matter what you try.

I am guessing that you are using a firewall to limit which systems are allowed to approach the filer, but I think it would be better if you put the firewall around the systems and the storage SVM so that there is a clear path between them, while also limiting which servers can approach the SVM.

Well, we talked with Firewall team as well, but they are saying that it is the normal behavior of the firewall to drop the packets rather than sending reset.

Another plan of action to resolve this issue is
Plan 1
keep both NAS IP and Storage LIF IP in same VLAN and don't keep any firewall in between. (currently both NAS IP and Storage LIF IP are in different VLAN with firewall in between)

but I would like to know
Plan 2
What if we keep the same setup with communication happening from random source ports from client end to storage LIF ports with firewall in between,

which will be more secure plan 1 or Plan 2?

Thanks

anil1000

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LEARN ABOUT DEBIAN

checkrad

CHECKRAD(5)							File Formats Manual						       CHECKRAD(5)

NAME

       checkrad -- See if a user is (still) logged in on a certain port.

SYNOPSIS

       checkrad [-d] nas-type nas-ip nas-port login session-id

DESCRIPTION

       Checkrad  is  used  by  the  radius  server  to check if its idea of a user logged in on a certain port/NAS is correct if a double login is
       detected.

       Returns: 0 = no duplicate, 1 = duplicate, >1 = error.

OPTIONS

       -d     Enable printing of debugging informations.

       nas-type
	      Type of port/NAS. Can be one of:

	      o      ascend

	      o      bay

	      o      cisco

	      o      cisco_l2tp

	      o      computone

	      o      cvx

	      o      digitro

	      o      dot1x

	      o      livingston

	      o      max40xx

	      o      mikrotik

	      o      mikrotik_snmp

	      o      multitech

	      o      netserver

	      o      other

	      o      pathras

	      o      patton

	      o      portslave

	      o      pr3000

	      o      pr4000

	      o      redback

	      o      tc

	      o      usrhiper

	      o      versanet

	      The "other" type cause checkrad to skip any check and always returns 1.

       nas-ip IP address of the NAS to check.

       nas-port
	      The NAS port to check (may be ignored by some nas-type).

       login  The login name to check.

       session-id
	      Session to check. (actually ignored by all nas-type)

SEE ALSO

       radiusd(8)

AUTHOR

       Written by Miquel van Smoorenburg, miquels@cistron.nl.

       This manual page was written by Marco Nenciarini <mnencia@debian.org> for the Debian project (but may be used by others).

								  13 January 2006						       CHECKRAD(5)