Redhat NTPD Clock (Bob, you may have the problem)

[John Wirt]

Bob McClure Jr wrote:

>On Fri, May 26, 2006 at 10:30:50PM -0400, John Wirt wrote:
>  
>
>>Bob McClure Jr wrote:
>>
>>    
>>
>>>On Fri, May 26, 2006 at 08:27:16AM -0400, John Wirt wrote:
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>>>      
>>>
>>>>John Wirt wrote:
>>>>
>>>>        
>>>>
>>>>>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
>>>>>    
>>>>>
>>>>>          
>>>>>
>>>>PS, also I have no Internet access the desktop.
>>>>  
>>>>
>>>>        
>>>>
>>>Not sure what you mean by that.  Post the results of "netstat -rn".
>>>You can do that as your mere mortal self.
>>>
>>>
>>>
>>>      
>>>
>>Here are the results of netstat -rn:
>>
>>Destination   Gateway        Genmask          Flags   MSS  WIndow irtt  iface
>>192.168.10.0  0.0.0.0        255.255.255.0    U         0  0         0  eth0
>>169.254.0.0   0.0.0.0        255.255.0.0      U         0  0         0  eth0
>>0.0.0.0       192.168.10.100 0.0.0.0          UG        0  0         0  eth0
>>
>>I tried sending this information by email to the computer that I am 
>>sending this from. The email apparently left my Linux machine  but never 
>>arrived at the other one. I am currently using the KDE desktop on the 
>>Linux machine.  Evolution email does not work.
>>
>>192.168.10.0 is the IP address of my local LAN. I have a cable modem 
>>connected to a Linksys router, which has four LAN ports.
>>    
>>
>
>Is its gateway address 192.168.10.100?  That seems a bit unusual.
>  
>
You may be onto something here. Originally, I used NAT to access the 
Internet through another machine. The NAT gateway was 192.168.10.100. 
and  all machines had fixed addressing (including my Linux machine). 
Recently, I switched to using a cable modem and router to form the local 
LAN. This LAN is set up using all DHCP.   Probably, I need to change the 
network configuration on my Linux machine to turn on DHCP.

I tried all the network configuration applications on the KDE desktop 
(Network Devices, etc.) but none allow designation of fixed v. DHCP 
addressing, or I could find anything.

How can I configure eth0 on my Linux machine?

>Are all the machines on static IP addresses or on DHCP?
>  
>
>How does one machine find another by name, i.e. are you using a local
>DNS or does the router do DNS for the internal network?
>
>  
>
DNS comes from Comcast. I know Comcast's DNS addresses.  The router must 
do the DNS. DNS is on auto for all my other machines and they work fine 
to the Internet.

John Wirt

>>If I ping 169..254.0.0, the reply times out.
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>
>Ignore that.
>
>  
>
>>John Wirt
>>
>>
>>John Wirt
>>
>>
>>    
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>>>>No errors other than the 
>>>>clock.redhat.com error is reported on boot up.
>>>>
>>>>- - - - - - - - - - - - - - - - - -
>>>>
>>>>        
>>>>
>>>>>>>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 at vitalstream.com -
>>>>>>>>- VitalStream, Inc.                       http://www.vitalstream.com -
>>>>>>>>-                                                                    -
>>>>>>>>-        Change is inevitable, except from a vending machine.        -
>>>>>>>>----------------------------------------------------------------------
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>>>>>Cheers,
>>>>>>
>>>>>>            
>>>>>>
>>>Cheers,
>>>      
>>>
>
>Cheers,
>  
>