A Quark of A Different Spin. (adameros) wrote in rhlinux,
A Quark of A Different Spin.
adameros
rhlinux

NTP woes.

[Edit: Cancel this. I went to lunch, came back and it was working. I guess I was too impatient for it. ]


I have 7 RH9 systems behind a firewall and I am trying to set up NTP on the systems so they can keep in sync with each other. Being in sync with the outside world would be a nice bonus, but not needed.

The systems are not running firewalls and can communicate fine with each other for other services, like ssh, nfs, etc.

But forsome reason they can not see each other via nfs. My current configuration looks like:

# Prohibit general access to this service.
restrict default ignore

# Permit all access over the loopback interface.  This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1 


# -- CLIENT NETWORK -------
# Permit systems on this network to synchronize with this
# time service.  Do not permit those systems to modify the
# configuration of this service.  Also, do not use those
# systems as peers for synchronization.
# restrict 192.168.1.0 mask 255.255.255.0 notrust nomodify notrap
# restrict 192.168.1.0 mask 255.255.255.0 notrust nomodify notrap


# --- OUR TIMESERVERS ----- 
# or remove the default restrict line 
# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.

# restrict mytrustedtimeserverip mask 255.255.255.255 nomodify notrap noquery
server 192.168.1.11
server 192.168.1.12
server 192.168.1.21
server 192.168.1.22
server 192.168.1.31
server 192.168.1.32
server 192.168.1.41
server 192.168.1.42
restrict 192.168.1.0 mask 255.255.255.0 notrap



# --- NTP MULTICASTCLIENT ---
#multicastclient                        # listen on default 224.0.1.1
# restrict 224.0.1.1 mask 255.255.255.255 notrust nomodify notrap
# restrict 192.168.1.0 mask 255.255.255.0 notrust nomodify notrap



# --- GENERAL CONFIGURATION ---
#
# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available. The
# default stratum is usually 3, but in this case we elect to use stratum
# 0. Since the server line does not have the prefer keyword, this driver
# is never used for synchronization, unless no other other
# synchronization source is available. In case the local host is
# controlled by some external source, such as an external oscillator or
# another protocol, the prefer keyword would cause the local host to
# disregard all other synchronization sources, unless the kernel
# modifications are in use and declare an unsynchronized condition.
#
#server 127.127.1.0     # local clock
server  66.187.233.4
fudge   127.127.1.0 stratum 10


#
# Drift file.  Put this in a directory which the daemon can write to.
# No symbolic links allowed, either, since the daemon updates the file
# by creating a temporary in the same directory and then rename()'ing
# it to the file.
#
driftfile /etc/ntp/drift
broadcastdelay  0.008

#
# Authentication delay.  If you use, or plan to use someday, the
# authentication facility you should make the programs in the auth_stuff
# directory and figure out what this number should be on your machine.
#
#authenticate yes

#
# Keys file.  If you want to diddle your server at run time, make a
# keys file (mode 600 for sure) and define the key number to be
# used for making requests.
#
# PLEASE DO NOT USE THE DEFAULT VALUES HERE. Pick your own, or remote
# systems might be able to reset your clock at will. Note also that
# ntpd is started with a -A flag, disabling authentication, that
# will have to be removed as well.
#
#keys           /etc/ntp/keys



According to the syslog it is starting just fine. If I do an "nmap -sU localhost" it sees the port being open. If I do an "nmap -sU remotehost" nmap goes out to lunch, but like I said, nfs is working so udp traffic isn't blocked.

If I run the "as" command from within ntpq it says the connection is rejected, but I have autorization disable for all the hosts, with the -A option to ntpd.

If I try to do an ntpdate to redhats ntp server, it works. If I try to do it to one of mine, it can't find a suitable server.

What am I doing wrong?
  • Post a new comment

    Error

    default userpic
  • 0 comments