How to provide a client exclusive access to the NTP device or NTP server.
Example:
1. Configured md5 authentication for a subnet added below restriction line to the subnet as below in ntp.conf file. Also configured the keys and md5 authentication working .
Question 1: Now how to provide just plain exclusive (non md5 authentication) to some of the IPs from the subnet.
Question 2: Any order to follow in ntp.conf file. Which will be precedence over the other.
Can you please let me know.
Appreciate your help.
Last edited by Don Cragun; 01-18-2016 at 06:17 AM..
Reason: Add CODE and ICODE tags.
Hi,
I was wondering if any of you guys know of way to make applications that use sound device on linux to access it in a "non-exclusive manner", the aim is to be able to use more than one application that requires the sound device.
Thanks (0 Replies)
Hi,
we have running 8 box sles 9 cluster and on an nfs filesystem we have the problem which is grepped from /var/log/messages.
Jun 8 13:40:46 qnclpx02 kernel: attempt to access beyond end of device
Jun 8 13:40:46 qnclpx02 kernel: sdat: rw=0, want=8894615912, limit=314572800
Is there... (1 Reply)
Hello everyone,
I write a program (Linux & Solaris) that will run as non-root user, but the program must have rw access to a device /dev/ipmi (on linux) or /dev/bmc (on solaris).
What is the standard way of granting such access?
Linux:
chmod on /dev/ipmi ?
suid root my program?
Solaris:... (1 Reply)
Problem statement.
In this part of the assignment, delegates will create a pseudo-device and write a device driver for it. The pseudo-device provides a “backdoor” for gaining root access for a particular user. Instead of compiling the device driver into the kernel, delegate will create a module.... (1 Reply)
hi, i am on a quest to access and even mount if possible a drive on os x. there is no driver for the device, but it lists fine in the system profiler. can i access its location from the terminal? how? here is what i get on the system profiler:
Speed: Up to 480 Mb/sec
Manufacturer: SAMSUNG
... (3 Replies)
I am trying to load into the kernel a system-call dynamically (without restarting the kernel and compailing it) in an attempt to (once in kernel mode) write to user process's memory.
(I know there is a way to do this with the ptrace interface but it is not an option.)
I know the only way to... (1 Reply)
I backed up my 320GB hard drive to a file with dd:
dd if=/dev/sda of=dev_sda.17-Mar-2012 bs=1048576The main idea was to be able to be able to completely replace my hard drive from this backup if necessary, but I'd also like to be able to restore individual files. I realize I could use this dd... (20 Replies)
Hi,
I have two ntp servers in my cluster and I want all the nodes in my cluster to sync with either of the ntp servers or just one. Unfortunately it keep rotating the sync, between my ntp server 1, ntp server 2 and local. Is there anyway I can change the sync to avoid local?
# ntpq -p
... (3 Replies)
Equipment: DJI Phantom 3
I have the root and passwords access, but I cannot find out how to access the equipment.
There is a USB port going to a miniUSB that connects to the equipment, but on Windows is detecting the connection as being a Serial Port (COM3).
I need some help in order to gain... (5 Replies)
I cannot access or boot from my C drive. I'm running Zorin 9 and the drive is a Samsung SSD. The disk was encrypted on install, and that has not given me any problems before.
When I start the system it gets to the memory test page, and does not then load the password prompt, which it used to.... (1 Reply)
Discussion started by: David4321
1 Replies
LEARN ABOUT SUSE
tnm::ntp
ntp(n) Tnm Tcl Extension ntp(n)
__________________________________________________________________________________________________________________________________________________NAME
ntp - Retrieve NTP status information.
_________________________________________________________________DESCRIPTION
The Network Time Protocol (NTP) (RFC 1119, RFC 1305) allows to synchronize computer clocks by exchanging NTP messages. The ntp command
allows to retrieve control variables from NTP peers.
NTP COMMAND
ntp [options]
Invoking the ntp command with options but without any command arguments allows to retrieve and change the default values. See the
description of supported options below. Default values are bound to a Tcl interpreter which allows to have multiple Tcl interpreter
with different defaults.
ntp [options] host arrayName
The ntp command sends a NTP version 3 mode 6 request to host and writes status information into the Tcl array arrayName. After suc-
cessful completion, the array will contain the following elements (RFC 1305):
peer.delay
This is a signed fixed-point number indicating the roundtrip delay of the peer clock relative to the local clock over the
network path between them, in seconds.
peer.dispersion
This is a signed fixed-point number indicating the maximum error of the peer clock relative to the local clock over the net-
work path between them, in seconds.
peer.offset
This is a signed, fixed-point number indicating the offset of the peer clock relative to the local clock, in seconds.
peer.precision
This is a signed integer indicating the precision of the various clocks, in seconds to the nearest power of two.
peer.reach
This is a shift register used to determine the reachability status of the peer, with bits entering from the least significant
(rightmost) end. A peer is considered reachable if at least one bit in this register is set to one.
peer.srcadr
This is the IP address of the peer.
peer.stratum
This is an integer indicating the stratum of the local clock.
peer.valid
This is an integer counter indicating the valid samples remaining in the filter register. It is used to determine the reacha-
bility state and when the poll interval should be increased or decreased.
sys.peer
This is a selector identifying the current synchronization source.
sys.precision
This is a signed integer indicating the precision of the various clocks, in seconds to the nearest power of two.
sys.refid
This is a 32-bit code identifying the particular reference clock.
sys.rootdelay
This is a signed fixed-point number indicating the total roundtrip delay to the primary reference source at the root of the
synchronization subnet, in seconds.
sys.rootdispersion
This is a signed fixed-point number indicating the maximum error relative to the primary reference source at the root of the
synchronization subnet, in seconds.
sys.stratum
This is an integer indicating the stratum of the local clock
sys.system
A textual description of the system type.
NTP OPTIONS
The following options control how NTP requests are send and how the ntp command deals with lost NTP packets.
-timeout time
The -timeout option defines the time the ntp command will wait for a response. The time is defined in seconds with a default of 2
seconds.
-retries number
The -retries option defines how many times a request is retransmitted during the timeout interval. The default number of retries is
2.
SEE ALSO scotty(1), Tnm(n), Tcl(n)
AUTHORS
Erik Schoenfelder <schoenfr@gaertner.de>
Juergen Schoenwaelder <schoenw@cs.utwente.nl>
Tnm ntp(n)