每天当机一次，有日志，希望高手帮忙分析

eyecoco

每天都需要重启一次，快疯了

error_log里面重复的出现：

1. [Wed Oct 22 16:30:57 2008] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)(这个好像是加载tomcat？)
   
2. [Wed Oct 22 16:30:57 2008] [notice] Digest: generating secret for digest authentication ...(和ZendOptimizer有关？)
   
3. [Wed Oct 22 16:30:57 2008] [notice] Digest: done
   
4. [Wed Oct 22 16:31:00 2008] [notice] Apache configured -- resuming normal operations(也是tomcat？)

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messges里面(因为今天早上8点之前没问题，所以我就看了之后的日志)：

出现很多类似这样的日志：

1. Oct 22 08:00:22 localhost kernel: [IPTABLES INPUT] : IN=ppp0 OUT= MAC= SRC=123.52.183.64 DST=125.3.93.98 LEN=52 TOS=0x00 PREC=0x00 TTL=45 ID=34837 DF PROTO=TCP SPT=2705 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0

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其他的：

Oct 22 08:08:45 localhost pppoe[2131]: Bad TCP checksum 100
Oct 22 08:09:16 localhost last message repeated 4 times
中间类似上面的代码，省略…………
Oct 22 09:30:35 localhost pppoe[2131]: Packet too big!  Check MTU on PPP interface
Oct 22 09:30:36 localhost pppd[2127]: Protocol-Reject for unsupported protocol 0x6b09

eyecoco

1. Oct 22 10:29:07 localhost pppd[2127]: No response to 3 echo-requests
   
2. Oct 22 10:29:07 localhost pppd[2127]: Serial link appears to be disconnected.
   
3. Oct 22 10:29:22 localhost pppd[2127]: Connect time 815.3 minutes.
   
4. Oct 22 10:29:22 localhost pppd[2127]: Sent 1095179918 bytes, received 4140331053 bytes.
   
5. Oct 22 10:33:26 localhost pppoe[2131]: Session 18440 terminated -- received PADT from peer
   
6. Oct 22 10:33:32 localhost pppoe[2131]: Sent PADT
   
7. Oct 22 10:34:18 localhost pppd[2127]: Modem hangup
   
8. Oct 22 10:34:18 localhost pppd[2127]: Connection terminated.
   
9. Oct 22 10:35:12 localhost ntpd[2390]: sendto(220.130.158.54) (fd=19): Invalid argument
   
10. Oct 22 10:37:28 localhost pppd[2127]: Exit.
    
11. Oct 22 10:42:15 localhost adsl-connect: ADSL connection lost; attempting re-connection.
    
12. Oct 22 10:43:56 localhost ntpd[2390]: sendto(220.130.158.51) (fd=19): Invalid argument
    
13. Oct 22 10:43:58 localhost ntpd[2390]: sendto(220.130.158.72) (fd=19): Invalid argument
    
14. Oct 22 10:44:13 localhost ntpd[2390]: sendto(220.130.158.52) (fd=19): Invalid argument
    
15. Oct 22 10:52:17 localhost ntpd[2390]: sendto(220.130.158.54) (fd=19): Invalid argument
    
16. Oct 22 11:01:00 localhost ntpd[2390]: sendto(220.130.158.51) (fd=19): Invalid argument
    
17. Oct 22 11:01:04 localhost ntpd[2390]: sendto(220.130.158.72) (fd=19): Invalid argument
    
18. Oct 22 11:01:16 localhost ntpd[2390]: sendto(220.130.158.52) (fd=19): Invalid argument
    
19. Oct 22 11:09:21 localhost ntpd[2390]: sendto(220.130.158.54) (fd=19): Invalid argument
    
20. Oct 22 11:18:05 localhost ntpd[2390]: sendto(220.130.158.51) (fd=19): Invalid argument
    
21. Oct 22 11:18:07 localhost ntpd[2390]: sendto(220.130.158.72) (fd=19): Invalid argument
    
22. Oct 22 11:18:20 localhost ntpd[2390]: sendto(220.130.158.52) (fd=19): Invalid argument
    
23. Oct 22 11:21:45 localhost pppd[28095]: pppd 2.4.4 started by root, uid 0
    
24. Oct 22 11:24:40 localhost pppd[28095]: Using interface ppp0
    
25. Oct 22 11:26:24 localhost ntpd[2390]: sendto(220.130.158.54) (fd=19): Invalid argument
    
26. Oct 22 11:27:47 localhost pppd[28095]: Connect: ppp0 <--> /dev/pts/0
    
27. Oct 22 11:27:47 localhost pppoe[28127]: PPP session is 39789
    
28. Oct 22 11:28:21 localhost pppoe[28127]: Session 39789 terminated -- received PADT from peer
    
29. Oct 22 11:28:21 localhost pppoe[28127]: Sent PADT
    
30. Oct 22 11:30:49 localhost pppd[28095]: Modem hangup
    
31. Oct 22 11:30:49 localhost pppd[28095]: Connection terminated.
    
32. Oct 22 11:33:28 localhost pppd[28095]: Exit.
    

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是不是和时间同步有关系？如果是的话应该如何设置？高手指教