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Deactivate DHCP on certain port - RUT240

0 votes
206 views 1 comments
by anonymous
Hello,

I have a situation where i need to connect a certain device to my RUT240 that has a certain IP with a specific port.

Let's use this scenario:
I have the Teltonika leasing IPs from 192.168.1.100 to .250, being the Lan IP 192.168.1.1. To this network I have a couple of other devices with static IPs on that range and other DHCP leases.
To the same LAN port, i need to connect a device that has the certain IP and port 170.2.0.3:8000, where a webserver is running, and i need to send information from the devices with static IP.

In order to make the system to normally operate, i must disable the DCHP lease on port 8000 on the RUT240, by not doing so, this situation is causing my network to become unstable.

I have looked on traffic rules, but is not sure for me if there is something there that could help me out here.
Any idea how can I fix this out?

Thank you in advance.

1 Answer

0 votes
by anonymous
Hello,

Could you provide your network topology diagram to make it a bit more clear?

By using 170.2.0.3:8000, do you mean that you employ port forwarding?

Also, DHCP is a connectionless service using UDP protocol, port 67 for server and 68 for client instances during IP exchange.

Best regards,
by anonymous

Hello,

Thank you very much for your reply and explanation.

This is a small diagram of the network:


%3CmxGraphModel%3E%3Croot%3E%3CmxCell%20id%3D%220%22%2F%3E%3CmxCell%20id%3D%221%22%20parent%3D%220%22%2F%3E%3CmxCell%20id%3D%222%22%20value%3D%22%22%20style%3D%22edgeStyle%3DorthogonalEdgeStyle%3Brounded%3D0%3BorthogonalLoop%3D1%3BjettySize%3Dauto%3Bhtml%3D1%3BstartArrow%3Dclassic%3BstartFill%3D1%3B%22%20edge%3D%221%22%20source%3D%224%22%20target%3D%228%22%20parent%3D%221%22%3E%3CmxGeometry%20relative%3D%221%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%223%22%20value%3D%22LAN%20port%22%20style%3D%22edgeLabel%3Bhtml%3D1%3Balign%3Dcenter%3BverticalAlign%3Dmiddle%3Bresizable%3D0%3Bpoints%3D%5B%5D%3B%22%20vertex%3D%221%22%20connectable%3D%220%22%20parent%3D%222%22%3E%3CmxGeometry%20x%3D%22-0.25%22%20relative%3D%221%22%20as%3D%22geometry%22%3E%3CmxPoint%20as%3D%22offset%22%2F%3E%3C%2FmxGeometry%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%224%22%20value%3D%22RUT%20240%20(Mobile%20Connection%20to%20Internet)%26lt%3Bbr%26gt%3B192.168.1.1%22%20style%3D%22rounded%3D1%3BwhiteSpace%3Dwrap%3Bhtml%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%22294%22%20y%3D%22140%22%20width%3D%22120%22%20height%3D%2260%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%225%22%20value%3D%22%22%20style%3D%22edgeStyle%3DorthogonalEdgeStyle%3Brounded%3D0%3BorthogonalLoop%3D1%3BjettySize%3Dauto%3Bhtml%3D1%3BstartArrow%3Dclassic%3BstartFill%3D1%3B%22%20edge%3D%221%22%20source%3D%228%22%20target%3D%229%22%20parent%3D%221%22%3E%3CmxGeometry%20relative%3D%221%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%226%22%20style%3D%22edgeStyle%3DorthogonalEdgeStyle%3Brounded%3D0%3BorthogonalLoop%3D1%3BjettySize%3Dauto%3Bhtml%3D1%3BexitX%3D0.25%3BexitY%3D1%3BexitDx%3D0%3BexitDy%3D0%3BstartArrow%3Dclassic%3BstartFill%3D1%3B%22%20edge%3D%221%22%20source%3D%228%22%20target%3D%2210%22%20parent%3D%221%22%3E%3CmxGeometry%20relative%3D%221%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%227%22%20style%3D%22edgeStyle%3DorthogonalEdgeStyle%3Brounded%3D0%3BorthogonalLoop%3D1%3BjettySize%3Dauto%3Bhtml%3D1%3BexitX%3D0.75%3BexitY%3D1%3BexitDx%3D0%3BexitDy%3D0%3BentryX%3D0.5%3BentryY%3D0%3BentryDx%3D0%3BentryDy%3D0%3BstartArrow%3Dclassic%3BstartFill%3D1%3B%22%20edge%3D%221%22%20source%3D%228%22%20target%3D%2215%22%20parent%3D%221%22%3E%3CmxGeometry%20relative%3D%221%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%228%22%20value%3D%22Ethernet%20Switch%22%20style%3D%22whiteSpace%3Dwrap%3Bhtml%3D1%3Brounded%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%22294%22%20y%3D%22310%22%20width%3D%22120%22%20height%3D%2260%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%229%22%20value%3D%22Device%20(Fixed%20IP)%26lt%3Bbr%26gt%3B192.168.1.101%22%20style%3D%22whiteSpace%3Dwrap%3Bhtml%3D1%3Brounded%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%2294%22%20y%3D%22310%22%20width%3D%22120%22%20height%3D%2260%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%2210%22%20value%3D%22Device%20(Fixed%20IP)%26lt%3Bbr%26gt%3B192.168.1.102%22%20style%3D%22whiteSpace%3Dwrap%3Bhtml%3D1%3Brounded%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%22200%22%20y%3D%22440%22%20width%3D%22120%22%20height%3D%2260%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%2211%22%20style%3D%22edgeStyle%3DorthogonalEdgeStyle%3Brounded%3D0%3BorthogonalLoop%3D1%3BjettySize%3Dauto%3Bhtml%3D1%3BexitX%3D0.5%3BexitY%3D1%3BexitDx%3D0%3BexitDy%3D0%3BentryX%3D1%3BentryY%3D0.5%3BentryDx%3D0%3BentryDy%3D0%3BstartArrow%3Dclassic%3BstartFill%3D1%3B%22%20edge%3D%221%22%20source%3D%2213%22%20target%3D%228%22%20parent%3D%221%22%3E%3CmxGeometry%20relative%3D%221%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%2212%22%20value%3D%22%22%20style%3D%22edgeStyle%3DorthogonalEdgeStyle%3Brounded%3D0%3BorthogonalLoop%3D1%3BjettySize%3Dauto%3Bhtml%3D1%3BstartArrow%3Dclassic%3BstartFill%3D1%3B%22%20edge%3D%221%22%20source%3D%2213%22%20target%3D%2214%22%20parent%3D%221%22%3E%3CmxGeometry%20relative%3D%221%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%2213%22%20value%3D%22External%20Device%20(Fixed%20IP)%26lt%3Bbr%26gt%3B172.10.0.1%3A8000%22%20style%3D%22rounded%3D1%3BwhiteSpace%3Dwrap%3Bhtml%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%22560%22%20y%3D%22170%22%20width%3D%22120%22%20height%3D%2260%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%2214%22%20value%3D%22Internet%20Connection%22%20style%3D%22whiteSpace%3Dwrap%3Bhtml%3D1%3Brounded%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%22560%22%20y%3D%2230%22%20width%3D%22120%22%20height%3D%2260%22%20as%3D%22geometry%22%2F%3E%3C%2FmxCell%3E%3CmxCell%20id%3D%2215%22%20value%3D%22Device%20(Dynamic%20IP)%26lt%3Bbr%26gt%3B192.168.1.105%22%20style%3D%22whiteSpace%3Dwrap%3Bhtml%3D1%3Brounded%3D1%3B%22%20vertex%3D%221%22%20parent%3D%221%22%3E%3CmxGeometry%20x%3D%22360%22%20y%3D%22440%22%20width%3D%22120%22%20h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