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DHCP Lease Expires on External Interface

coolharts

I have been using the Astaro/Sophos home product for many years without an issue until recently.

A month ago my ISP set up and connected my house with fiber to the home, previously I was on DSL connected to a modem in bridge mode. With Fiber to the home my UTM directly connects to the transceiver with a cat 5e cable.

After the migration everything has been fine but lately the UTM is not renewing its lease all of the time. My ISP sets the renewal time for once an hour, the MAC address is mapped with reservation so it does not change. In order to get connectivity back I have to log in and renew the address or if I am away a hard reboot of the UTM fixes the problem. I can go several days without a problem or several hours, there is no pattern.

I am running Firmware version 9.403-4. for testing I have changed auto negotiate to 100 Full, soft rebooted, shut down reboot and hard reboots. Any suggestions? I am not a Linux person so I haven't logged in to make changes, just GUI.

Thanks in advance.



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  • 0 in reply to coolharts

    Yes it probably was just the telco... UTM issues tend not to go away until you update the firmware or reboot.

  • 0 in reply to Dlabun

    The issue is still there, appears to be somewhat random but I was wondering if UDP traffic from League of Legends may be interfering with port 67? I have noticed when we are away and it is lease renewal time it has not had a problem.

    Is there a way to tell the Firewall that it needs to retry for a lease more than once and timeout or is there a way to automatically restart the WAN port if there is a loss of addressing?

  • 0 in reply to coolharts

    Hi

    I've seen this issue a few times over the last 1 year i think. I can see in the "system" logfile that the UTM is trying to renew the lease many times but didnt seem to get an answer. I also saw many failures at the same time a week ago together with the renewal entries in the system log (with HA cluster) after unpowering the Master i immediately got a new lease (same IP).

    I'm not sure that it was always the same error but everytime i've rebooted a standalone firewal or let the slave take over in a cluster the lease is back.

    It was always on Fiber Connections, but on different ISPs and with different Models (also VmWare VM) in Switzerland. Because this didn't hapen many times i didn't open a Ticket.

    I will send the logfiles from the last failure to sophos as a case but i don't think that they will get to a solution or a conclusion why this does happen.

    PS: This were all Business Connections, so no LOL traffic.

    I will post back if i did get an answer from sophos.

    Regards

    Michael

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