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Forum Discussion

morris_aiu's avatar
morris_aiu
Aspirant
Mar 28, 2016

FVS318N - Clock skew detected

Model: FVS318N

Firmware: 4.3.3-6

 

Problem:

IPSec tunnel to PFSense router constantly fails and drops internet. Requires hard-reboot for it to come back up.

This is a 4+ times a day thing. This is also happening on 6 of our 28 FVS318N's.

 

Log from router:

 

Mon Mar 28 11:31:20 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Should overwrite TID here for NULL data ntry <6
Mon Mar 28 11:31:05 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Should overwrite TID here for NULL data ntry <6
Mon Mar 28 11:30:50 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Should overwrite TID here for NULL data ntry <6
Mon Mar 28 11:30:34 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Should overwrite TID here for NULL data ntry <6
Mon Mar 28 11:30:19 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Should overwrite TID here for NULL data ntry <6
Mon Mar 28 11:30:04 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Should overwrite TID here for NULL data ntry <6
Mon Mar 28 11:22:18 2016(GMT-0600) [FVS318N][Kernel][KERNEL] <sppe_cmd_arp> Fail to delete IPv4 ARP entry <6
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] HTB: quantum of class 11024 is big. Consider r2q change. de_mem_map a03bb000
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] HTB: quantum of class 10001 is big. Consider r2q change.
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected 
Mon Mar 28 09:12:23 2016(GMT-0600) [FVS318N][Kernel][KERNEL] Clock skew detected

 

 

Full Log:

FVS318N Full Log 03 - Pastebin.com

 

Changelog:

Received FVS318N with FWV:4.3.3-2 preloaded.

Hard Reset using 'Reset button' on back of router

Once backup, loaded FWV:4.3.3-6

changed 'admin' password.

added (3) custom services on non-root ports

added (3) port forwards to non-root ports.

added (1) custom NTP server '0.pfsense.pool.ntp.org'

changed NTP mode to 'Sync to NTP Servers on Internet'

checked 'Respond to Ping on Internet Ports' with the suboption 'Any' selected

added (2) IPSec tunnels through wizard

 

 

 

 

Hardware
Troubleshooting

10 Replies

  • JohnRo's avatar
    JohnRo
    NETGEAR Employee Retired
    Mar 28, 2016

    Hello morris_aiu, 

     

    Welcome to the community! 

     

    I have seen this error before, it appears that this is caused by the Time Zone not matching thier locations. If you have a box-to-box VPN configured, check each end and make sure that they are on the correct time zone. For FVS318N go to Administration>Time Zone.  

     

    Let me know if this helps. 

     

    Thanks, 

    • morris_aiu's avatar
      morris_aiu
      Aspirant
      Mar 29, 2016

      JohnRo,

       

      I've checked all of 6 of our FVS318N's that are having this problem.

      They were all showing the correct time, and correct time zone.

      Also noticed on a reboot all logs start off in December, until it syncs with NTP servers.

       

      I appreciate the reply!

      • JohnRo's avatar
        JohnRo
        NETGEAR Employee Retired
        Mar 29, 2016

        Hello morris_aiu, 

         

        Please try the steps below and see if they will make any changes: 

         

        1. Boot the router and disconnect all established tunnels 
        2. Properly sync the time either using NTP servers or manually(using Authoritative Mode). - If the settings are already correct, just click on "Apply"
        3. Soft Reboot the Device using option "Reboot the Router" in "Monitoring -> Diagnostics" 
        4. After device got booted up, Connect the Tunnels. 
        5. Then test the issue. 

         

        If this will not solve the issue, you may have to open a ticket with our support team. 

         

        Thanks, 

    • DaneA's avatar
      DaneA
      NETGEAR Employee Retired
      May 17, 2016

      Hi just_luc,

       

      Welcome to the community! :)

       

      So far, there  is no issues log about clock skew in the FVS318N.  Kindly answer the questions below: 

       

      a. Do you have an IPSec VPN tunnel establish between two FVS318N?

      b. Were you able to try the troubleshooting steps suggested on this forum thread?  

      c. What is the current firmware version of your FVS318N?

       

       

      Regards,

       

      DaneA

      NETGEAR Community Team

      • DaneA's avatar
        DaneA
        NETGEAR Employee Retired
        May 17, 2016

        @morris_aiu,

         

        Were you able to open an online case with NETGEAR Support?  If yes, kindly share what happened. 

         

         

        Regards,

         

        DaneA

        NETGEAR Community Team

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