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Loss of internet connectivity roughly same time each day

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#1 ·
For a week or so I have been suddenly losing internet connectivity at about the same time each day. The issue persists until I reboot Windows. A reboot resolves the issue until the following day at about the same time. It seems to happen between about 6:30 and 8pm each night.

I run Open VPN over a wired connection, with a fixed IP.

When connectivity goes, there is no indication in the taskbar that there is an issue. Open VPN indicates it is still connected, Windows indicates it is still connected but I cannot connect to the internet or the LAN.

Attempts to reconnect the VPN lead to failure. If I close the VPN and disable it then I'm still not connected.

Disabling and re-enabling my ethernet adapter has no effect. Rebooting my router has no effect. At the same time other devices in the house are still connected normally.

You can probably imagine how useful Google searches were on this issue, so I need to investigate myself but don't really know where to start. I run Malwarebytes Anti-Malware Home Premium, Bitdefender Free. I've checked for malware, nada. SFC found some corrupted files and replaced them, but the issue persists.

I haven't done any updates or installed any new software since this started.

Where do I go next to look for the problem?

Tech Support Guy System Info Utility version 1.0.0.4
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Phenom(tm) II X4 B55 Processor, AMD64 Family 16 Model 4 Stepping 3
Processor Count: 4
RAM: 16382 Mb
Graphics Card: AMD Radeon HD 5700 Series, 1024 Mb
Hard Drives: C: 119 GB (13 GB Free); D: 695 GB (270 GB Free); E: 465 GB (170 GB Free); G: 785 GB (458 GB Free); J: 298 GB (46 GB Free); P: 931 GB (383 GB Free); R: 1863 GB (1634 GB Free); S: 2099 GB (1080 GB Free);
Motherboard: ASUSTeK Computer INC., M4A89GTD-PRO
Antivirus: Bitdefender Antivirus Free Edition, Enabled and Updated
 
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#2 · (Edited)
If you are correct and the issue only occurs between
. It seems to happen between about 6:30 and 8pm each night.
then it is most likely either a process on the computer scheduled for approx. that time - such as a scan with BitDefender or other system tools you use, especially third party system maintenance tools
OR despite other devices in the house still connected - it is some manner of local interference although this would affect only a wireless connection.
I have seen such examples where an item within the house has caused such problem

One was identified as a baby watch alarm and every evening when it was switched on wireless internet connection was up and down.

From your post I read it as you are connected Ethernet cable in which case you should examine what processes and apps are running on the computer when this loss occurs

Finally in cases like this it is always worthwhile trying another cable. A poor connection in a cable can be the cause of such problems

Also which is in use now the motherboard integrated Ethernet adapter or the separate card
 
#3 ·
Also ...

Open a (black) Command Prompt window:
Hold the Windows logo key and press r; in the Run box type cmd and click on OK.

Type the following command:

IPCONFIG /ALL

[Note that there is no space between the slash and ALL.]

[Press ENTER after the command.]

Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.

If necessary use a text file and removable media to copy the results to a computer with internet access.
 
#4 ·
If you are correct and the issue only occurs between

then it is most likely either a process on the computer scheduled for approx. that time - such as a scan with BitDefender or other system tools you use, especially third party system maintenance tools
OR despite other devices in the house still connected - it is some manner of local interference although this would affect only a wireless connection.
I have seen such examples where an item within the house has caused such problem

One was identified as a baby watch alarm and every evening when it was switched on wireless internet connection was up and down.

From your post I read it as you are connected Ethernet cable in which case you should examine what processes and apps are running on the computer when this loss occurs

Finally in cases like this it is always worthwhile trying another cable. A poor connection in a cable can be the cause of such problems

Also which is in use now the motherboard integrated Ethernet adapter or the separate card
Well, it didn't happen Saturday at all then on Sunday it happened overnight between 2am and 7 so I think the timing is probably a red herring. I checked and there are no processes or updates happening at the times that the issue had previously occurred anyway. All my updates and system scans are scheduled for between 4 and 7am, so one of those may have been the cause of the problem last night but that's not consistent with the previous events. I swapped out my cables when this first started happening, and the ethernet switch that my cables run through so I'm pretty sure that they are not the issue.

It's a onboard ethernet.

Also ...

Open a (black) Command Prompt window:
Hold the Windows logo key and press r; in the Run box type cmd and click on OK.

Type the following command:

IPCONFIG /ALL

[Note that there is no space between the slash and ALL.]

[Press ENTER after the command.]

Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.

If necessary use a text file and removable media to copy the results to a computer with internet access.
So ipconfig /all when the connection is lost is:
Windows IP Configuration

Host Name . . . . . . . . . . . . : BERTHA_5
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter PIA:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : TAP-Windows Adapter V9
Physical Address. . . . . . . . . : 00-FF-3D-E0-B9-27
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d54f:d16b:f879:1c1%34(Preferred)
IPv4 Address. . . . . . . . . . . : 10.18.10.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.252
Lease Obtained. . . . . . . . . . : 27 February 2017 05:23:58
Lease Expires . . . . . . . . . . : 27 February 2018 05:23:58
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 10.18.10.5
DHCPv6 IAID . . . . . . . . . . . : 520159037
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1E-35-8D-83-F8-1A-67-00-61-83

DNS Servers . . . . . . . . . . . : 209.222.18.222
209.222.18.218
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter B34C0N1973:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 48-5B-39-0A-5D-C8
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d893:54cb:1a5:4d89%32(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.11.200(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.11.1
DHCPv6 IAID . . . . . . . . . . . : 575167289
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1E-35-8D-83-F8-1A-67-00-61-83

DNS Servers . . . . . . . . . . . : 192.168.11.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{3DE0B927-7BB7-4AFC-AA94-7B28174C3FE0}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{3AD6E7EC-EFCF-4987-9668-3309B9E702E0}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes​

and when it is active it's:

Windows IP Configuration

Host Name . . . . . . . . . . . . : BERTHA_5
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter PIA:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : TAP-Windows Adapter V9
Physical Address. . . . . . . . . : 00-FF-3D-E0-B9-27
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d54f:d16b:f879:1c1%34(Preferred)
IPv4 Address. . . . . . . . . . . : 10.46.10.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.252
Lease Obtained. . . . . . . . . . : 27 February 2017 09:50:51
Lease Expires . . . . . . . . . . : 27 February 2018 09:50:55
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 10.46.10.5
DHCPv6 IAID . . . . . . . . . . . : 520159037
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1E-35-8D-83-F8-1A-67-00-61-83

DNS Servers . . . . . . . . . . . : 209.222.18.222
209.222.18.218
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter B34C0N1973:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 48-5B-39-0A-5D-C8
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d893:54cb:1a5:4d89%32(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.11.200(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.11.1
DHCPv6 IAID . . . . . . . . . . . : 575167289
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1E-35-8D-83-F8-1A-67-00-61-83

DNS Servers . . . . . . . . . . . : 192.168.11.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{3DE0B927-7BB7-4AFC-AA94-7B28174C3FE0}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{3AD6E7EC-EFCF-4987-9668-3309B9E702E0}:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes​
 
#5 ·
No need to quote an entire post unless it is necessary to indicate to what you are replying.

Try ...

TCP/IP stack repair options for use with Vista through 10.

Start - All Programs - Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt. [For Windows 8 thru 10: <Windows Logo> + x - Command Prompt(Admin)]

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log

Reboot the machine after all three commands; no need to boot after the 1st and 2nd.
 
#6 ·
IMHO the problem is related to your Open VPN and its installation of your
TAP-Windows Adapter V9
and the use of that for your connection

It is I think well documented that problems are not unusual with the TAP adapter
 
#7 ·
Macboatmaster - can you explain further and is there an alternative VPN solution? I've been running the VPN solidly using this setup for over 2 years without any problems and the issue has only recently occurred. What would make a stable functional VPN setup suddenly go bad?

TerryNet - I've tried your suggestion. I'll report back after a couple of days whether it has made a difference.

Thanks both
 
#8 ·
Well perhaps I am wrong - lets see if my colleagues suggestion has solved it for you
 
#10 ·
Try Switching Bitdefender firewall off
 
#11 ·
I don't have Bitdefender firewall, just AV. I use Look n Stop, and have done for nearly a decade without any issues so whilst it could be that, I'd be surprised. Nothing shows in the logs when the loss of connection occurs and switching it off at the time doesn't allow me to reconnect. I haven't tested having it permanently off as a preventative though, but can do if you really think it is worth doing.
 
#12 ·
So, I managed to solve this in the end - it looks like it probably was OpenVPN. I uninstalled that and used the VPNs own app and the issue resolved. I'm a little cautious about stating that it is definitely the reason, because I had to move to a different FW at the same time - that's the main reason I was using Open VPN, because the VPNs own app didn't play well with Look n Stop.

The new FW (Comodo) is not as easy to configure and it doesn't seem to be as easy to secure as LnS but it will do whilst I investigate other options.
 
#13 ·
Well done
I did suspect it
IMHO the problem is related to your Open VPN
I had read so many reports of problems similar to yours
 
#15 ·
Unfortunately it looks like this problem has come back. It seems to be more intermittent, but I am still seeing disconnections.

I am no longer using Open-VPN, I am using the app provided by my VPN - Private Internet Access.

Any other suggestions on where to look?

Thanks
 
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