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WAN interface goes down every few days.

Paul C1

Hey all,

 

My WAN interface keeps going down every two or so days. It started earlier this week and I can't find a reason why it happens. Once I reboot the router, it comes back up.

I've had the exact same issue a while back when I was using XG under ESXI, so I upgraded, about two months ago, to a Qotom Q355G4 4GB RAM / 128GB SSD running XG on bare-metal.

 

Any ideas how I can troubleshoot this issue? The WAN interface stops working at around 2-3AM. At least that is when the logs stop recording anything new.



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    Each ISP Gatweways react differently. This is by design to prevent flood attacks. The router (XG) can send keep alive packets the gateway in a few different ways, for example:

    • ARP requests
    • PING requests 
    • KEEP Alive (no packets are sent).

    Assuming the XG uses a ping to the gateway to test for service and it doesn't respond, the firewall can assume that is it had lost connectivity. Either change the way that the XG confirms connectivity or ask your ISP to respond to your router. Perform a packet capture to prove that the gateway is dropping packets. If your ISP is not business but residential its very unlikely that they will make any changes at all, and also will probably not know what a packet capture is.There are other factors, ISP's re-provision the load balancing at exchange centres every night. You could install PRTG on a windows machine, after it is completed a Auto discovery of your your network, add a Route trace probe. 

    You could change the modem if you are running A/VDSL is another option, but a costly one. 

    Try to move the VM to full fat machine

    Change the NIC.

     

     

     

     

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  • 0

    Each ISP Gatweways react differently. This is by design to prevent flood attacks. The router (XG) can send keep alive packets the gateway in a few different ways, for example:

    • ARP requests
    • PING requests 
    • KEEP Alive (no packets are sent).

    Assuming the XG uses a ping to the gateway to test for service and it doesn't respond, the firewall can assume that is it had lost connectivity. Either change the way that the XG confirms connectivity or ask your ISP to respond to your router. Perform a packet capture to prove that the gateway is dropping packets. If your ISP is not business but residential its very unlikely that they will make any changes at all, and also will probably not know what a packet capture is.There are other factors, ISP's re-provision the load balancing at exchange centres every night. You could install PRTG on a windows machine, after it is completed a Auto discovery of your your network, add a Route trace probe. 

    You could change the modem if you are running A/VDSL is another option, but a costly one. 

    Try to move the VM to full fat machine

    Change the NIC.

     

     

     

     

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