 | | | Redhat NTPD Clock | Redhat NTPD Clock 2006-05-26 - By John Wirt
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Bob McClure Jr wrote:
>On Thu, May 25, 2006 at 09:26:57PM -0400, John Wirt wrote:
>
>
>>Hmm..can you tell me how to set the security level?
>>
>>Thank you, Rick.
>>
>>John Wirt
>>
>>
>
>We prefer bottom posting here. See
>
> http://en.wikipedia.org/wiki/Top-posting
>
>Try "firewall-config".
>
>
>
When I enter "firewall-config" as a command, the response is "command
not found"
When I enter "iptables -h" as a command. the response is "command not found"
What should I do?
John Wirt
>>Rick Stevens wrote:
>>
>>
>>
>>>On Thu, 2006-05-25 at 00:58 -0400, John Wirt wrote:
>>>
>>>
>>>
>>>
>>>>Thanks you several of you, I have RedHat booting to completion just fine
>>>>except for one problem.
>>>>
>>>>Near the end of the boot sequence, RedHat apparently tries to connect to
>>>>some time standard at 66.187.224.4. The sequence is:
>>>>
>>>>
>>>>ntpd: Opening firewall for input from 66.187.224.4 port 123
>>>>ntpd: Opening firewall for input from clock.redhat.com port 123
>>>>iptables v 1.2.8: host/network clock.redhat.com not found [FAILED]
>>>>
>>>> use iptables -h for assistance.
>>>>
>>>>However, iptables -h doesn't provide any help.
>>>>
>>>>What is the problem? How can I fix it?
>>>>
>>>>
>>>>
>>>>
>>>You must have the firewall open ports for TCP and UDP port 53 (DNS).
>>>What's probably happening is that the system is trying to resolve
>>>clock.redhat.com (66.187.224.4 and 66.187.233.4) and can't because the
>>>firewall is blocking DNS issues. This happens if you used the "maximum"
>>>setting on system-config-securitylevel as that blocks EVERYTHING
>>>(including DNS). Use the "medium" security setting.
>>>
>>>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
>>>- Rick Stevens, Senior Systems Engineer rstevens@(protected) -
>>>- VitalStream, Inc. http://www.vitalstream.com -
>>>- -
>>>- Change is inevitable, except from a vending machine. -
>>>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
>>>
>>>
>
>Cheers,
>
>
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