Source port on AIX for NAS is same? Post: 303018978

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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

06-20-2018

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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 CENTOS

firewalld.conf

FIREWALLD.CONF(5)						  firewalld.conf						 FIREWALLD.CONF(5)

NAME

       firewalld.conf - firewalld configuration file

SYNOPSIS

       /etc/firewalld/firewalld.conf

DESCRIPTION

       firewalld.conf is loaded by firewalld during the initialization process. The file contains the basic configuration options for firewalld.

OPTIONS

       These are the options that can be set in the config file:

       DefaultZone
	   This sets the default zone for connections or interfaces if the zone is not selected or specified by NetworkManager, initscripts or
	   command line tool. The default zone is public.

       MinimalMark
	   For some firewall settings several rules are needed in different tables to be able to handle packets in the correct way. To achieve
	   that these packets are marked using the MARK target iptables(8) and ip6tables(8). With the MinimalMark option a block of marks can be
	   reserved for private use; only marks over this value are used. The default MinimalMark value is 100.

       CleanupOnExit
	   If firewalld stops, it cleans up all firewall rules. Setting this option to no or false leaves the current firewall rules untouched.
	   The default value is yes or true.

       Lockdown
	   If this option is enabled, firewall changes with the D-Bus interface will be limited to applications that are listed in the lockdown
	   whitelist (see firewalld.lockdownwhitelist(5)). The default value is no or false.

SEE ALSO

       firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5), firewalld.direct(5), firewalld.icmptype(5),
       firewalld.lockdown-whitelist(5), firewall-offline-cmd(1), firewalld.richlanguage(5), firewalld.service(5), firewalld.zone(5),
       firewalld.zones(5)

NOTES

       firewalld home page at fedorahosted.org:
	   http://fedorahosted.org/firewalld/

       More documentation with examples:
	   http://fedoraproject.org/wiki/FirewallD

AUTHORS

       Thomas Woerner <twoerner@redhat.com>
	   Developer

       Jiri Popelka <jpopelka@redhat.com>
	   Developer

firewalld 0.3.9 														 FIREWALLD.CONF(5)