Question No or actual partial/access to network from new device?
Question No or actual partial/access to network from new device?
Hello everyone!
Welcome to the summer start – a new member here, but a dedicated fan and longtime visitor.
I’m facing a bit of a challenge, though I’m fairly competent as an engineer. I’m trying to configure a brand new laptop on my home network. It’s not overly complex compared to business setups, but it feels a bit excessive for a typical home environment.
The setup process is this:
Internet > Firewall (NGFW) > Segmented across around 6 different subnets (for example, 192.168.1.0/24 – 192.168.10.0/24 – 192.168.20.0/24 etc… and some VLANs intended for my virtual machines, but that’s not the main problem). All systems are connected together.
Example configuration:
- NGFW: 192.168.1.1 (internal IP)
- PC1 – 192.168.1.100 (main PC – sees everything, including VMs and all VLANs, plus WiFi)
- PC2 – 192.168.1.101 (second PC – same as above)
- ESX – 192.168.1.2 (sees everything – same as above)
- DMZ – 192.168.40/24 (only sees some internal VMs and access from the main PC, one laptop, and one mobile device)
- WiFi – 192.168.20./24 (all 4–5 devices see what’s permitted by NGFW and APs)
- Laptop1 on WiFi (sees everything allowed by NGFW)
- Laptop2 on WiFi (same as above)
- Tablet/Mobile (same as above)
- NAS Devices (NetGear/WD – access only to specific IPs/MAC addresses as defined)
...
Every system is running either Windows 10 Pro or Windows 11 Home and supports Ubuntu, Suse, RasbPi.
The issue is that the new laptop I’ve set up exactly like this can’t connect to much of the network. For example:
#1 I can connect to the main PC via RDP, but it can’t see the network share.
#2 I can reach both NAS devices over the web, but only one of them is accessible via the network.
#3 All devices (including VMs) respond to ping tests that are permitted for testing and internal use.
#4 I can connect to some VMs using VNC, RDP, or FTP where applicable.
#5 I’ve even created a replica rule that maps Laptop1 to the new laptop.
#6 All systems are updated with official drivers and services.
#7 No logs are being recorded (I also enabled detailed logging).
#8 The main difference is that the new laptop is a Dell model, while the others are customized or from Lenovo/IBM/Samsung.
#9 I removed the custom ISO image for Dell and created a fresh one from Windows – same results.
#10 I’m still confused...
Any suggestions? It looks like a random or unusual problem I haven’t seen before. All services and network sharing are enabled. Even with network analysis tools, nothing appears.
Any help would be greatly appreciated!
Sorry for the lengthy post and the lack of a detailed network diagram.
Best regards!
Modem and router specifications for the new setup.
On the updated laptop:
Check that only a single network adapter is active—either wired or wireless—not both simultaneously.
Execute "ipconfig /all" on the laptop and compare it with the outputs from two or three other functioning devices on the same network.
Share the complete output of each "ipconfig /all" command for reference.
Include a simple network diagram illustrating the connections, IP addresses (DHCP or static), and subnet masks.
The sketch can be taken or scanned, then uploaded via imgur (www.imgur.com) with the green "New post" icon.
Because ping functions properly, the networking problem isn't fundamental. Your subnet masks and gateways seem correct. The situation likely hinges on your firewall configuration. It's rare, but it's possible the firewall blocks communication between devices on the 192.168.1.x network. You might need to utilize a unique switch feature for this. If we skip the more complicated part of accessing other subnets, the issue probably lies with the PC itself. Your current arrangement should be similar to connecting all devices through a simple switch. I suspect there could be some issues in the Microsoft firewall on the PC, possibly related to device discovery via broadcast.