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Full Discussion: Source port on AIX for NAS is same?
Operating Systems AIX Source port on AIX for NAS is same? Post 303018978 by Scrutinizer on Wednesday 20th of June 2018 12:51:09 PM
Old 06-20-2018
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. I think 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.
Last edited by Scrutinizer; 06-20-2018 at 03:18 PM..
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LEARN ABOUT DEBIAN

apf

APF(1)							      General Commands Manual							    APF(1)

NAME

       apf - easy iptables based firewall system

SYNOPSIS

       apf

DESCRIPTION

       This  manual page documents briefly the apf command.  This manual page was written for the Debian distribution because the original program
       does not have a manual page.

       Advanced Policy Firewall (APF) is an iptables (netfilter) based firewall system designed around the essential  needs  of  today's  Internet
       deployed  servers  and the unique needs of custom deployed Linux installations. The configuration of APF is designed to be very informative
       and present the user with an easy to follow process, from top to bottom of the configuration file. The management of APF  on  a	day-to-day
       basis  is  conducted from the command line with the 'apf' command, which includes detailed usage information and all the features one would
       expect from a current and forward thinking firewall solution.

OPTIONS

       apf follow the usual GNU command line syntax, with long options starting with two dashes (`-').	A summary of options is included below.

       -s|--start
	      load all firewall rules

       -r|--restart
	      stop (flush) & reload firewall rules

       -l|--list
	      list all firewall rules

       -t|--status
	      output firewall status log

       -e|--refresh
	      refresh & resolve dns names in trust rules

       -a <HOST CMT|--allow <HOST COMMENT>
	      add host (IP/FQDN) to allow_hosts.rules and immediately load new rule into firewall

       -d <HOST CMT|--deny <HOST COMMENT>
	      add host (IP/FQDN) to deny_hosts.rules and immediately load new rule into firewall

       -u <HOST>|--remove <HOST>
	      remove host from [glob]*_hosts.rules and immediately remove rule from firewall

       -o|--ovars
	      output all configuration options

COPYRIGHT

       Copyright (C) 1999-2007, R-fx Networks <proj@r-fx.org>
       Copyright (C) 2007, Ryan MacDonald <ryan@r-fx.org> This program may be freely redistributed under the terms of the GNU GPL

       This manual page was written by Giuseppe Iuculano <giuseppe@iuculano.it>, for the Debian project (but may be used by others).

								  August 17, 2008							    APF(1)
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