NTP server - can't fix it
Hello,
I have two 10.6.4 server machines wich I use as NTP server for my clients (both referes to time.europe.apple.com and have flagged NTP under general settings to enable NTP).
One of them works properly: if on a client i use his FQDN or IP they took istantly the right hour.. the other one is like unseen from clients.
both of them have the following files configurations:
/private/etc/ntp.conf
server time.euro.apple.com
/private/etc/ntp-restrict.conf
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
#localhost is unrestricted
restrict 127.0.0.1
restrict -6 ::1
includefile /private/etc/ntp.conf
I can figure out why one of them works and the other one not..
Both of them have firewall service off.
Maybe if you tried to restore your computer back to a month ago or sometime before you had this problem?
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NTP server unreachable through ASA firewall
Hi all,
I've configured a DMZ switch to point to an NTP server on on the Inside, but I get a debug message on the switch that says:
NTP: <NTP server IP address> unreachable
I'm confident that the NTP server is configured properly, as there are more than a dozen other hosts using it, successfully. The difficulty here is that the NTP packets are having to flow from the DMZ to the Inside. I have a rule set on the firewall that permits the IP address of the switch to connect to the IP address of the NTP server as follows:
access-list intdmz1_acl extended permit udp host <IP address of switch> host <IP address of NTP server> eq ntp
I can see the hit counter on this rule incrementing.
The firewall can ping the NTP server, and the NTP server can ping the switch, so I think routing is OK.
Output from the DMZ switch:
switch#show ntp associations
address ref clock st when poll reach delay offset disp
~192.168.65.254 0.0.0.0 16 - 64 0 0.0 0.00 16000.
* master (synced), # master (unsynced), + selected, - candidate, ~ configured
switch#show ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**17
reference time is 00000000.00000000 (00:00:00.000 GMT Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 0.00 msec, peer dispersion is 0.00 msec
PRNLN-DMZ-SW01#sh run | inc ntp
ntp source Vlan138
ntp server 192.168.65.254
ukhvdc00vs01#sh run | inc ntp
ntp source Vlan65
ntp master 3
ntp update-calendar
ntp server 0.uk.pool.ntp.org
ntp server 1.uk.pool.ntp.org
PRNLN-DMZ-SW01#show ntp status
Clock is unsynchronized, stratum 16, no reference clock
nominal freq is 119.2092 Hz, actual freq is 119.2092 Hz, precision is 2**17
reference time is 00000000.00000000 (00:00:00.000 GMT Mon Jan 1 1900)
clock offset is 0.0000 msec, root delay is 0.00 msec
root dispersion is 0.00 msec, peer dispersion is 0.00 msec
Does the firewall rule need to permit more than UDP/123 for this to work perhaps?
NTPconfig on DMZ switch:
switch#sh run | inc ntp
ntp source Vlan138
ntp server <IP address of NTP server>
===================
NTP config on NTP server:
NTP_Server#sh run | inc ntp
ntp source Vlan65
ntp master 3
ntp update-calendar
ntp server 0.uk.pool.ntp.org
ntp server 1.uk.pool.ntp.org
Any guidance welcomed.
Thank you,
OllyHi Julio,
Hi Julio,
For the purposes of this information:
DMZ switch IP = 5.6.7.8
NTP server IP = 10.1.1.1
Here's the output from the show commands:
ciscoasa# show capture NTPCAPTUREDMZ
11 packets captured
1: 16:22:05.271500 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2: 16:23:09.276185 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
3: 16:24:13.274033 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
4: 16:24:57.272813 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
5: 16:24:58.279480 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
6: 16:24:59.277817 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
7: 16:25:00.275971 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
8: 16:25:01.275559 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
9: 16:25:02.272599 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
10: 16:25:03.279129 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
11: 16:25:04.277710 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
11 packets shown
ciscoasa# show capture NTPCAPTUREINSIDE
0 packet captured
0 packet shown
ciscoasa# show capture NTPASP | include 10.1.1.1
419: 16:24:13.274171 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
1820: 16:24:57.272904 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
1841: 16:24:58.279587 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
1876: 16:24:59.277909 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
1934: 16:25:00.276062 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2027: 16:25:01.275651 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2068: 16:25:02.272690 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2095: 16:25:03.279221 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2129: 16:25:04.277802 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2200: 16:25:05.275849 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2233: 16:25:06.274094 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2275: 16:25:07.273606 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2327: 16:25:08.280182 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2347: 16:25:09.277222 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2373: 16:25:10.275467 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2399: 16:25:11.273759 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
2414: 16:25:12.273347 802.1Q vlan#138 P6 5.6.7.8.123 > 10.1.1.1.123: udp 48
I'm guessing we should see some packets in the second capture, but we're not...
Does this help?
Thanks!
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http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
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http://ipadnerds.com/fix-wifi-issue-ios-7/
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http://ipadnerds.com/fix-wifi-issue-ios-7/
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http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
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http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
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How to Boost Your Wi-Fi Signal
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iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
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iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
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https://discussions.apple.com/thread/4010130
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Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
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http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
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A Davey1 wrote:
Not a nice answer!
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Hi
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