06-20-2018
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
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LEARN ABOUT CENTOS
firewall-config
FIREWALL-CONFIG(1) firewall-config FIREWALL-CONFIG(1)
NAME
firewall-config - firewalld GUI configuration tool
SYNOPSIS
firewall-config [OPTIONS...]
DESCRIPTION
firewall-config is a GUI configuration tool for firewalld.
OPTIONS
firewall-config does not support any special options. The only options that can be used are the general options that Gtk uses for Gtk
application initialization. For more information on these options, please have a look at the runtime documentation for Gtk.
The following options are supported:
-h, --help
Prints a short help text and exists.
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 FIREWALL-CONFIG(1)