I'm experiencing sudden break ups witht he connection with my XG135w.
The configuration is as follows: ISP model with optical connection - unmanaged switch (with nothing else connected except ISP modem and XG) - XG - couple of switches with PoE and two Ubiquiti AP.
It all started on friday last week when I wanted to configure my two Ubiquiti APs with additional Guest WiFi network (with our existing one). After that the Ubiquiti APs started breaking up, so I deleted the newly created Guest WiFi, but after this I realised that our XG is always breaking up the connection to the internet. COuple of times it was WAN interface down, then it was okay but the connection was just broken for couple of seconds (without messaging that the WAN is down), then it went up for another couple of minutes, than breaks and so on (often with the message DNS_PROBE_FINISHED_NXDOMAIN after trying to refresh a site or to open a new one).
We have a ESXi on the network that has a AD virtual machine. The XG has a static DNS IP address set.
I'm not sure where to look at. It was all running smoothly before this Ubiquiti thing. Tried one more time to play with MTU (it was 1500) or to add a second rule to the WAN link manager for going down, but without help.
Hello Shteki,Thank you for reaching out to the community, can you please share us a screenshot of your DNS configuration on the XG.Log file details: https://docs.sophos.com/nsg/sophos-firewall/18.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Logs/LogFileDetails/index.htmlCan you share the dgd.log when your WAN connection breaks up ?
Thanks & Regards,_______________________________________________________________
Vivek Jagad | Technical Account Manager 3 | Cyber Security Evolved
Sophos Community | Product Documentation | Sophos Techvids | SMSIf a post solves your question please use the 'Verify Answer' button.
Check your DNS or what ever you are testing against for connectivity. Why do you have a switch between the modem and the XG?
XG115W - v19.5 GA - Home
Test machine - Asus P10S-i E3-1225v5, 6gb, 4 intel NICs, v19.5 GA
If a post solves your question please use the 'Verify Answer' button.
here are the pictures of the setting:
And the screenshot of the CLI (I've run the command "cat dgd.log |grep dead")
Regaridng the switch - it's an unmanaged swithc, I've red somewhere here on the forum that I could help regarding often breakups with the connection.
One more thing, the ISP modem is connected to another subnetwork, where the DHCP is in ISP modem range (192.168.1.x) and internet is working there without problems.
Hey Shteki,Thank you for the update, use global DNS 188.8.131.52 in DNS 1 preference following with the mentioned one. Under the WAN Link manager under the failover gateways > edit the failover rules and with the "AND" condition also add your interface gateway too.Observe this and see if that has improved the situation.
you mean something like this:
Yup Shteki, that's right !!
I've changed it, I'm going to bserve it during the next couple of hours and reply here with the result.
Sure, and have you also updated the DNS preference under the DNS section ? As per the screenshot the DNS 1 preference is set to 10.27.27.6 , So would suggest keep the global DNS 184.108.40.206 as DNS 1 and following with that DNS 2 as 10.27.27.6 !! Shteki
Thank you, I've just updated this too, going to see is it going to help.