Re: [Devil-Linux-discuss] ntp problem

[Philip P. <ph...@vo...>]

One other item I noticed.
I use a different firewall than the ones provided (don't know if this 
matters here).

When networking is started, network communications are blocked (all 
packets dropped). Starting up the firewall opens up the network (as much 
as the firewall allows).
This is fine, since it closes a security hole during boot.

However, syslog is started BEFORE the firewall is brought up. If you are 
logging to a remote system, it, of course, fails since it can't connect.
The workaround for that is to change the order of startup to have syslog 
start after the firewall is set up.

Philip

Bruce Smith wrote:
> Yup, that "fixes" it!  :-)
>
>  - BS
>
>
>   
>> Forgot to mention how to do it:
>>
>> Setup -> Services to be started on boot -> IPV6_ROUTING
>>
>> Turn this off. Save config. Reboot.
>>
>>
>>
>> Philip Peake wrote: 
>>     
>>> Yes its IPV6 that breaks it.
>>> I disables IPV6 routing and it then works ok.
>>>
>>> Philip
>>>
>>> ---------------
>>> Bruce Smith wrote: 
>>>       
>>>> I can confirm that ntpd is broken, with the default config anyway.
>>>>
>>>> I did some strace'ing and it's trying to listen on a IPv6 wildcard
>>>> address "::". 
>>>>
>>>> I'm guessing it's not working because I'm not running IPv6, and I
>>>> haven't figured out if how to turn off IPv6 in ntp.conf, or if it's even
>>>> possible to turn off IPv6 in ntpd.
>>>>
>>>> Anyone with some IPv6 knowledge have any ideas?  
>>>> Maybe if I activated IPv6 on eth0?  How do I do that?
>>>>
>>>> For now, I guess I'll stick a 'ntpdate' in an hourly cron job to keep my
>>>> server's time correct.  But that won't help people who need to run a
>>>> real NTP server.
>>>>
>>>>  - BS
>>>>
>>>>
>>>>   
>>>>         
>>>>> Yep, after reboot, and everytime I try to start xntpd.
>>>>> I found another guy on the web who was complaining that he notices the same thing when running ntp
>>>>> and one of the eth interfaces was down. Mine are up but that's why I rather think it's and ntp bug
>>>>> ...
>>>>>
>>>>> lsof output:
>>>>>
>>>>> COMMAND  PID   USER   FD   TYPE DEVICE SIZE NODE NAME
>>>>> dhcpcd   545   root    4u  IPv4   5090       UDP *:bootpc 
>>>>> dnsmasq  684 nobody    4u  IPv4   5796       UDP *:domain 
>>>>> dnsmasq  684 nobody    5u  IPv4   5797       TCP *:domain (LISTEN)
>>>>> dnsmasq  684 nobody    9u  IPv4   5810       UDP *:filenet-tms 
>>>>> dhcpd    771   root    5u  IPv4   6329       UDP *:bootps 
>>>>> sshd     901   root    3u  IPv4   7006       TCP esgaroth:ssh (LISTEN)
>>>>> smbd    1243   root   18u  IPv4   8570       TCP esgaroth:microsoft-ds (LISTEN)
>>>>> smbd    1243   root   19u  IPv4   8571       TCP esgaroth:netbios-ssn (LISTEN)
>>>>> nmbd    1247   root    6u  IPv4   8793       UDP *:netbios-ns 
>>>>> nmbd    1247   root    7u  IPv4   8794       UDP *:netbios-dgm 
>>>>> nmbd    1247   root    8u  IPv4   8796       UDP esgaroth:netbios-ns 
>>>>> nmbd    1247   root    9u  IPv4   8797       UDP esgaroth:netbios-dgm  
>>>>>
>>>>> as you see no port 123. Also I see no ntp in the process list
>>>>>
>>>>> Best regards
>>>>> --- Heiko Zuerker <he...@zu...> wrote:
>>>>>
>>>>>     
>>>>>           
>>>>>> Do you get this message after you reboot the box?
>>>>>>
>>>>>> What's the output of the following commands:
>>>>>> lsof -i tcp:123
>>>>>> lsof -i udp:123
>>>>>>             
>
>
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