10 More Discussions You Might Find Interesting
1. Red Hat
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)
Discussion started by: pjeedu2247
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2. HP-UX
Hi
I wonder if its possible to setup NTP clients running HP-UX o.s. from a solaris 10 NTP server?
FR (3 Replies)
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3. UNIX for Advanced & Expert Users
Hello;
I work now with a team which has based her "applications" on the following schema:
1 NFS client C1 (linux redhat 5) writes a file fic.dat on a NFS SERVER S (RH 5)
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4. Fedora
hi guys
I have several Red Hat 5.7(7) all of them sync time with two NTP Servers based on Windows but the issue is I configure the NTP service, I start the ntp service and use ntpdate -u to set the time the first time
This is what I do
1. Configure /etc/ntp.conf
restrict default kod... (2 Replies)
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5. Linux
All here, thank you for listening. Now I've set up a Linux NTP server by adding a external windows NTP server in /etc/ntp.conf. Then I start the ntpd daemon. But how often does the Linux NTP server update its time with the external NTP server? I've looked up everywhere but found no information... (1 Reply)
Discussion started by: MichaelLi
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6. UNIX for Dummies Questions & Answers
Hi,
I have to change the mail server, but I could not find the file where it is written in.
I use the following command:
</> echo krneki | mail -v -s "New report" receiver@our.comp
Server name ("skala") can be seen in a terminal output ....
receiver@our.comp ... Connecting to... (0 Replies)
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7. AIX
I work for a fairly large organization who recently tasked me with securing our telnet services with IPsec. We have a large mixed environment where most of our servers are running unsecured telnet. ssh was my first suggestion but because of the cost of purchasing an enterprise license for a fips... (2 Replies)
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8. UNIX for Advanced & Expert Users
I need to find out the NTP Clients which are syncing with my NTP Server in a Unix(Linux/Solaris) Machine. For eg. How many Stratum 2 Servers sync the time with my Stratum1 Server. Is there any way to track it?
edit by bakunin: moving the thread to where it belongs: the technical forums. (4 Replies)
Discussion started by: hottyspidy
4 Replies
9. AIX
Dear people,
i have a problem with my DHCP Server based on an AIX.
I try to evaluate my dhcpsd.log and find some errors.
But now i'm missing a documentation about this errors.
For example "protocol_spsm: address check failed".
i would be happy if someone could tell me where to find a... (0 Replies)
Discussion started by: ektoplasma2000
0 Replies
10. Solaris
All,
How do you set a Solaris 9 server which received ntp updates from a ntp server to broadcast them on a local subnet. I have created a /etc/inet/ntp.conf file to receive the updates from a server on network and need to make this server become like a ntp relay from the main server.
Any... (1 Reply)
Discussion started by: bubba112557
1 Replies
AHCPD(8) System Manager's Manual AHCPD(8)
NAME
ahcpd - ad-hoc configuration daemon
SYNOPSIS
ahcpd option... [ -- ] interface...
DESCRIPTION
AHCP is a configuration protocol that can replace DHCP on networks without transitive connectivity, such as mesh networks.
OPTIONS
-m multicast-address
Specify the link-local multicast address to be used by AHCP. The default is ff02::cca6:c0f9:e182:5359.
-p port
Specify the UDP port number to be used by AHCP. The default is 5359.
-n Operate as a forwarder: participate in the flooding protocol, but don't actually perform any configuration.
-4 Only attempt to configure IPv4 addresses.
-6 Only attempt to configure IPv6 addresses.
-N Do not configure DNS.
-t time
Specify the time, in seconds, for which leases are requested. The default is slightly over one hour. Must be between five minutes
and a year.
-s script
Specify the configuration script to run. The default is /etc/ahcp/ahcp-config.sh.
-d level
Set the debug level to level (default 1).
-i filename
Specify the filename containing this host's unique id. The default is /var/lib/ahcp-unique-id. If it doesn't exist, it will be
created by ahcpd.
-c filename
Specify the name of the configuration file.
-C statement
Specify a configuration statement directly on the command line.
-D Daemonise at startup.
-L logfile
Specify a file to log random ``how do you do?'' messages to. This defaults to standard error if not daemonising, and to
/var/log/ahcpd.log otherwise.
-I pidfile
Specify a file to write our process id to. The default is /var/run/ahcpd.pid.
CONFIGURATION FILE FORMAT
The configuration is a sequence of lines, each of which starts with one of the keywords below. Blank lines are ignored. Comments are
introduced with an octothorp ``#'' and terminate at the end of the line.
The following keywords are recognised:
mode server|client|forwarder
Specifies whether the daemon operates as a server, a client, or a forwarder. If omitted, the default is to operate as a client,
unless the -n flag is present on the command line. If present, this must be the first line in the configuration file.
prefix prefix
Specifies a prefix to use for configuring clients. This keyword is only valid in server configurations, and may be specified twice,
once for IPv4 and once for IPv6.
lease-dir directory
Specifies a directory to store lease files. This keyword is only valid in server configurations.
name-server address
Specifies the address of a DNS server to configure clients with. This keyword is only valid in server configurations, and may be
repeated multiple times.
ntp-server address
Specifies the address of an NTP server to configure clients with. This keyword is only valid in server configurations, and may be
repeated multiple times.
FILES
/var/lib/ahcp-unique-id
An 8-byte long file containing this host's unique id. If it doesn't exist, a new unique id will be generated from an interface's
MAC address.
/etc/ahcp/ahcp-config.sh
The script that performs the actual configuration. It will be passed one argument, which is either start or stop.
/etc/ahcp/ahcp-local.sh
If this is an executable script, it will be called by ahcp-config.sh just after configuring or deconfiguring. It will be passed one
argument, which is either start or stop.
SIGNALS
SIGUSR1
Print ahcpd's status to standard output or to the log file.
SIGUSR2
Check all interfaces for status changes, then reopen the log file.
NOTES
Since the AHCP protocol is designed for mesh networks, it doesn't have any provisions for setting routing parameters such as a default
gateway, the IPv4 network mask and the IPv6 list of on-link prefixes; these are expected to be provided by a full-fledged routing protocol
for mesh nodes, and by router advertisements for ordinary nodes.
The AHCP server should use NTP to synchronise its clock. If a server instance of ahcpd doesn't detect time synchronisation, it will only
give out leases for a short period of time, and be extremely conservative about releasing them. Note that an SNTP client is not enough --
ahcpd actually checks with the kernel for time synchronisation, so real NTP is necessary.
SEE ALSO
dhcpcd(8), dhclient(8), babeld(8), olsrd(8), ntpd(8), The Ad-Hoc Configuration Protocol.
AUTHOR
Juliusz Chroboczek.
AHCPD(8)