Netduma losing internet at arandom times

[gearsniper550]

for some reason at random times im losing internet when i look at the network it says nothing for the ethernet port where the duma is supposed to be listed butthe wifi is still on and the light for my pc connection goes in and out a few times and then it comes back, i dont know what could be causing it.

[Netduma Fraser]

What is the model of the modem/router the R3 is connected to and how have you set that to ensure all traffic flows to the R3? E.g R3 in its DMZ, modem/bridge mode

Do you have internet on that modem/router when it happens?

Please provide the log from Settings > Troubleshooting if it happens again 

[gearsniper550]

its connected to a verizon router i dont know the name of it but it looks like an xbox x. I have internet on the router its just the r3 that goes out for a few minutes repeatedly. 

R3_2025-08-14T21_09_00.442Z_logs.txt

[Netduma Fraser]

In DHCP Advanced change the DHCP lease time to 10000 reboot from the interface and then see if it happens again please

[gearsniper550]

it seems to have fixed it, it hasnt done it for a while. Ill let you know if it does it again. Thanks for your help

[Netduma Fraser]

11 hours ago, gearsniper550 said:

it seems to have fixed it, it hasnt done it for a while. Ill let you know if it does it again. Thanks for your help

Great to hear that! If it were to happen again it should occur a week after you changed it

[gearsniper550]

yeah it happened again heres the logs 

R3_2025-08-26T04_30_40.477Z_logs.txt

[Netduma Fraser]

Likely the DHCP lease then, you shouldn't get a disconnect every time/it should reconnect very quickly but you can instead assign reserved IPs for devices in DHCP settings which should prevent it permanently

[gearsniper550]

how do i do that sorry ive never had this problem before

[Netduma Fraser]

Settings > DHCP > Add Rule > Select Device > Save 

Then repeat for each device

[gearsniper550]

ok thanks

[gearsniper550]

it happened again while i was playing halo  a few minutes ago heres the logs

R3_2025-08-29T02_37_55.582Z_logs.txt

[Netduma Fraser]

11 hours ago, gearsniper550 said:

it happened again while i was playing halo  a few minutes ago heres the logs

R3_2025-08-29T02_37_55.582Z_logs.txt 104.35 kB · 0 downloads

Was it your PC in LAN port 4? If so the port showed it disconnected for 3 seconds but doesn't specifically say why so could be an external cause this time, continue monitoring and see if it happens again please

[gearsniper550]

its doing it again but it wont even connect to the internet now the light goes in and out now

[gearsniper550]

R3_2025-08-29T20_41_48.617Z_logs.txt

[Netduma Fraser]

I can see the internet definitely went out this time. On the Verizon router give the R3 a static/reserved IP address and also make sure that IP is in its DMZ, then reboot the R3 from the interface, wait 4 minutes before accessing and monitor from there

[gearsniper550]

ok i just have to figure out how to get into the verizon router lol

[Netduma Fraser]

57 minutes ago, gearsniper550 said:

ok i just have to figure out how to get into the verizon router lol

There should be a sticker on the underside of it with that information

[gearsniper550]

4 hours ago, Netduma Fraser said:

I can see the internet definitely went out this time. On the Verizon router give the R3 a static/reserved IP address and also make sure that IP is in its DMZ, then reboot the R3 from the interface, wait 4 minutes before accessing and monitor from there

im sorry im new to this thing how would i do this in the router

[Netduma Fraser]

That'd be on the Verizon router so I can't give you specific instructions on how to do that but they should be in similar locations to where they appear on the R3. If not, lookup the model of your router and it will show in the manual

[gearsniper550]

i havent done the dmz thing yet but it happened again heres the logs

R3_2025-09-01T00_45_08.070Z_logs.txt

[gearsniper550]

i did the dmz router and it just did it R3_2025-09-01T01_39_36.090Z_logs.txt

[Netduma Fraser]

Did you set it as static as well? Are you using PPPoE/VLAN or IPv6 at all?

[gearsniper550]

yeah i set it to static. No im not using those

[Netduma Fraser]

Does it seem to follow any sort of pattern such as same time of day, same devices being used when it disconnects etc?