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 DEBIAN
radwho
RADWHO(1) FreeRADIUS Daemon RADWHO(1)
NAME
radwho - show online users
SYNOPSIS
radwho [-c] [-d raddb_directory] [-f] [-i] [-n] [-N nas_ip_address] [-p] [-P nas_port] [-r] [-R] [-s] [-S] [-u user] [-U user] [-Z]
DESCRIPTION
The FreeRADIUS server can be configured to maintain an active session database in a file called radutmp. This utility shows the content of
that session database.
OPTIONS
-c Shows caller ID (if available) instead of the full name.
-d raddb_directory
The directory that contains the RADIUS configuration files. Defaults to /etc/raddb.
-f Behave as the 'fingerd' daemon - waits for one line of input, then prints the output with lines
terminated.
-i Shows the session ID instead of the full name.
-n Normally radwho looks up the username in the systems password file, and shows the full username as well. The -n flags prevents this.
-N nas_ip_address
Show only those entries which match the given NAS IP address.
-p Adds an extra column for the port type - I for ISDN, A for Analog.
-P nas_port
Show only those entries which match the given NAS port.
-r Outputs all data in raw format - no headers, no formatting, fields are comma-separated.
-R Output all data in RADIUS attribute format. All fields are printed.
-s Show full name.
-S Hide shell users. Doesn't show the entries for users that do not have a SLIP or PPP session.
-u user
Show only those entries which match the given username (case insensitive).
-U user
Show only those entries which match the given username (case sensitive).
-Z When combined with -R, prints out the contents of an Accounting-Request packet which can be passed to radclient, in order to "zap"
that users session from radutmp.
For example,
$ radwho -ZRN 10.0.0.1 | radclient -f - radius.example.net acct testing123
will result in all an Accounting-Request packet being sent to the RADIUS server, which tells the server that the NAS rebooted. i.e. It
"zaps" all of the users on that NAS.
To "zap" one user, specifiy NAS, username, and NAS port:
$ radwho -ZRN 10.0.0.1 -u user -P 10 | radclient -f - radius.example.net acct testing123
Other combinations are also possible.
SEE ALSO
radiusd(8), radclient(1), radiusd.conf(5).
AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl.
7 April 2005 RADWHO(1)