- Jul 16, 2016
- 255
- 59
Hi guys,
My NetTime has been working fine for a few days.
Suddenly, I realized, its icon at the taskbar has gone from bright yellow & green to dimmed/grayed.
This usually indicates there is an error.
IP = 192.168.88.1 is the NIC that all my CCTV cameras are connected.
Just wondering if my NetTime icon at my windows has gone dimmed,
How to troubleshoot the root of the problem?
Later I found my answer:
When I did further investigation, someone has removed the Windows Firewall Rule (Inbound Rule) for NetTime time to allow the connection.
I tested on my wireless client adapter Tp-link, TL-WA1201, Time sync failed.
However, all my cameras' time is fully synced.

Here are the screenshots of my NetTime:


For the last few months, I have been having lots of issues regarding my cameras (I had all my Chinese cameras- Foscam connected to my local network)
I have an Asus RT-AC86U router and blocked all the internet connections for the camera, but still to no avail.
In the past, I was having......
Strange issues, like wifi client adapter will crash, camera IPs in BI network configuration will get messed up, so my camera view will get no signal.
Only recently I started to use a dual NIC set up.
Since then the above issues are solved.
But somehow or rather the hacker managed to remove the Windows firewall inbound rule for NetTime to work.
Has anyone faced this kind of serious problem at all?
Update 1: I suspected, 1 PC in my local (Main) network is compromised so the PC is permanently switched off
and disconnected from the network. I will keep monitoring my CCTV PC if there is any funny thing happening
for the next few days. I would not think my CCTV PC is compromised, since I had already freshly installed it a few
months ago.
Update 2: I redo the Windows Firewall inbound rule, now NetTime Service.exe is able to connect.
Below picture shows NetTime log Viewer:

Time sync is working now:

My NetTime has been working fine for a few days.
Suddenly, I realized, its icon at the taskbar has gone from bright yellow & green to dimmed/grayed.
This usually indicates there is an error.
IP = 192.168.88.1 is the NIC that all my CCTV cameras are connected.
Just wondering if my NetTime icon at my windows has gone dimmed,
How to troubleshoot the root of the problem?
Later I found my answer:
When I did further investigation, someone has removed the Windows Firewall Rule (Inbound Rule) for NetTime time to allow the connection.
I tested on my wireless client adapter Tp-link, TL-WA1201, Time sync failed.
However, all my cameras' time is fully synced.

Here are the screenshots of my NetTime:


For the last few months, I have been having lots of issues regarding my cameras (I had all my Chinese cameras- Foscam connected to my local network)
I have an Asus RT-AC86U router and blocked all the internet connections for the camera, but still to no avail.
In the past, I was having......
Strange issues, like wifi client adapter will crash, camera IPs in BI network configuration will get messed up, so my camera view will get no signal.
Only recently I started to use a dual NIC set up.
Since then the above issues are solved.
But somehow or rather the hacker managed to remove the Windows firewall inbound rule for NetTime to work.
Has anyone faced this kind of serious problem at all?
Update 1: I suspected, 1 PC in my local (Main) network is compromised so the PC is permanently switched off
and disconnected from the network. I will keep monitoring my CCTV PC if there is any funny thing happening
for the next few days. I would not think my CCTV PC is compromised, since I had already freshly installed it a few
months ago.
Update 2: I redo the Windows Firewall inbound rule, now NetTime Service.exe is able to connect.
Below picture shows NetTime log Viewer:

Time sync is working now:

Last edited: