One of my clients has a Windows 7 PC with one LAN card(IP 192.168.0.1), which is connected to 20 different temperature sensors(IPs from 192.168.0.100 - 120). Now they want to connect this PC to the internet for email temperature alert. Unfortunately, their LAN and internet gateway is using the same IP range. Their internet gateway is 192.168.0.1. Many of the computers in the LAN are having the same IP as the temperature sensor IPs. Is it possible to add a second LAN card to this PC with a different range static IP but still connect to the internet through the same gateway by using a router or something?
Looking for a solution to connect internet without IP conflict
- Thread starter jamshi9
- Start date
Solution
- May 29, 2013
- 37,312
- 3,275
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The simple thing is to change the internet side to a different subnet. Don't mess with the sensor network(s). Change the internet gateway address and DHCP range to a different subnet 192.168.99.x or something. Get that change stable, THEN add a second network card to the sensor PC(s).
failboat
Splendid
- Feb 19, 2010
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The ips of the sensors don't matter if they don't need the internet. I'd keep them in the same cidr /24 range so that you can scan for them. You can change the subnet of your network and your pc can still communicate with them if they are all on the same layer2. layer2 just uses mac addresses. adding a second nic won't help you. to get them to communicate on separate layer2s you need VLANs.
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