Quote:
Originally Posted by theducks
You should only ever have ONE DHCP server on a network. A number of devices you list CAN Offer that service in its config. Just say NO 
My Snology CAN be the DHCP, My Access Point CAN be the DHCP. But I leave that job to my Router.
For 99% of home user, the ROUTER is the DHCP server.
OTOH , the DNS service to use, could be set at each device (manual). (not usually if DHCP is used). DNS problems usually result in the 'Taking to long to Respond'/'Address Not Found' on web pages or Pings failing. |
I checked all NAS devices (QNAP x 3 & Synology). None have DHCP enabled. My router is a Draytek Vigor 2925 without Wifi (updated to the latest available firmware). This is connected to the ISP's Modem-Router using that Modem-Router as a Gateway.
The ISP's Modem-Router is a Raisecom Epon Onu iscom ht803. It does have a DHCP functionality but i assume cannot be disabled. This modem has been in place since January 2021 and has not caused any issues in the past. The lease time on the current modem is 1 day with dynamic IP address but this seldom changes.
The Draytek is set for supply of the DHCP. Looking at ipconfig on the Windows10 PC it shows that the DHCP Server as 192.168.100.1 which is the Draytek router.
I need to get access to the ISP's modem to check its configuration but that may take a time as their help desk are very bad and you have to persuade them to do a site visit. Plus they only speak Khmer.
The only other issue is the DNS servers. The first is 115.178.24.3 ad the second is Google 8.8.8.8. The first is owned by SingMeng which has now been taken over by Ezecom. Due to Government action reducing the number of ISPs Ezecom have taken over 3 ISPs which the Government forced to close. The Government want to establish a single internet exit point for Cambodia.
Ezecom are struggling with managing the the increased number of users and have multiple outages every day. Although I don't think the DNS servers are the issue I need to consider using alternate Public DNS servers.
Kaspersky virus check on the USB Drive is still running after 15 hours and I expect it to run for a bit longer.
I will change the DNS servers to public servers.
The only change that have occurred around the time of the problem are:
1. I fixed issues with SMB access to the NAS drives allowing SMB V1
2. I installed Facebook messenger app for a virtual meeting (now uninstalled)
3. I tidied up Credentials manager. There are no web credentials.
4. I transferred one old QNAP NAS to an academic institution and spent a lot time ensuring that it was clean. Only data on the NAS was the books and documentaries.
I will reboot the ISP modem when Kasspersky finishes.