I'm troubleshooting some problem with NFS server, mountd to be precise. Server is running AIX 5.3. When NFS starts, mountd listens both on TCP and UDP ports:
Port 6666 is fixed in /etc/services. After the start server works fine, clients can mount exported directories without any issues. After some time (not sure how long, perhaps after some idle period) mountd stops listening on TCP and only UDP remains:
The problem is that clients still try to contact TCP port first, despite the fact (I can see that in network trace) that portmap says TCP program is not available. Such requests are retransmitted until they timeout and there is 2 min delay in service because of such retransmits. After timeout client tries UDP port and everything goes fine. Roughly speaking, network conversation goes like this:
Any ideas why mountd stops listening on TCP? Of course, there is another issue with clients who insist on TCP and ignores answers from portmap, but I thought I'll start with server side. In fact, I tried to read a bit about such client behaviour, too, but found nothing.
Hi, folks.
Sorry for bothering, but maybe someone could help me please.
The problem is the following:
there is some script that copies files from local file system to AFS. The copying is performed with dd command.
The script copies data into some AFS volumes.
The problem appeared with one... (0 Replies)
Hi
Please help me with the following problem with my script.
The following block of code is not repeating in the while loop and exiting after searching for first message.
input_file
==========
host001-01
host001-02
2008-07-23 13:02:04,651 ConnectionFactory - Setting session state... (2 Replies)
1) when user login to the server the session got colosed. How will resolve?
2) While firing the command ls -l we are not able to see the any files in the director. but over all view the file system using the command df -g it is showing 91% used. what will be the problem?
Thanks in advance. (1 Reply)
Hi,
i've a redhat linux 9 upadated by redhat from 7 version to 9 version. A couple of days ago i was a problem with my mail, in other words i'm not able to get any email nor to send any email. I've a proxy configuration and i tried to set iptables in order to verify the port. The 110,255 and 995... (1 Reply)
At work I am trying to get this one Linux machine (let's call it ctesgm07) to behave like another Linux machine that we have (let's call it test007).
test007 returns the following version info:
cat /etc/debian_version: lenny/sid
uname -a: Linux test007 2.6.27-7-generic #1 SMP Tue Nov 4... (0 Replies)
Dear ALL.
I installed AIX OS on customer sites.
but Only one site is too slow when I connected telnet, ftp..
Ping is too fast. but telnet and FTP is not connected..
of course i check the configuration file on aix but it's normal.
Do any Idea??
thanks in advance.
- Jun - (3 Replies)
Hi,
This is rather a question from a "user" than from a sys admin, but I think this forum is apropriate for the question.
I have an adress with automatic email forwarding and for some senders (two hietherto), emails are bouncing. This has really created a lot of problems those two time so I... (0 Replies)
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
* I wanted to remove lines containing digits so I used this... (25 Replies)
Hi everyone,
I am experiencing discontinuity of Internet service, this started 1 month ago. Everything worked very well for 1 year of intensive use, but now, I have problems reaching my gateway.
The gateway is not my router but a node belonging to my ISP and I share the same public IP with... (3 Replies)
Discussion started by: remic
3 Replies
LEARN ABOUT NETBSD
mountd
MOUNTD(8) BSD System Manager's Manual MOUNTD(8)NAME
mountd -- service remote NFS mount requests
SYNOPSIS
mountd [-dN] [-P policy] [-p port] [exportsfile]
DESCRIPTION
mountd is the server for NFS mount requests from other client machines. mountd listens for service requests at the port indicated in the NFS
server specification; see Network File System Protocol Specification, RFC 1094, Appendix A and NFS: Network File System Version 3 Protocol
Specification, Appendix I.
Options and operands available for mountd:
-d Enable debugging mode. mountd will not detach from the controlling terminal and will print debugging messages to stderr.
-N Do not require privileged ports for mount or NFS RPC calls. This option is equivalent to specifying ``-noresvport -noresvmnt'' on
every export. See exports(5) for more information. Some operating systems (notably Mac OS X) require this option.
-P policy
IPsec policy string, as described in ipsec_set_policy(3). Multiple IPsec policy strings may be specified by using a semicolon as a
separator. If conflicting policy strings are found in a single line, the last string will take effect. If an invalid IPsec policy
string is used mountd logs an error message and terminates itself.
-p port
Force mountd to bind to the given port. If this option is not given, mountd may bind to every anonymous port (in the range 600-1023)
which causes trouble when trying to use NFS through a firewall.
exportsfile
The exportsfile argument specifies an alternative location for the exports file.
When mountd is started, it loads the export host addresses and options into the kernel using the nfssvc(2) system call. After changing the
exports file, a hangup signal should be sent to the mountd daemon to get it to reload the export information. After sending the SIGHUP (kill
-s HUP `cat /var/run/mountd.pid`), check the syslog output to see if mountd logged any parsing errors in the exports file.
After receiving SIGTERM, mountd sends a broadcast request to remove the mount list from all the clients. This can take a long time, since
the broadcast request waits for each client to respond.
FILES
/etc/exports the list of exported filesystems
/var/run/mountd.pid the pid of the currently running mountd
/var/db/mountdtab the list of remotely mounted filesystems
SEE ALSO nfsstat(1), nfssvc(2), exports(5), nfsd(8), rpcbind(8), showmount(8)HISTORY
The mountd utility first appeared in 4.4BSD.
BSD November 2, 2011 BSD