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rut955 rut240 rut950 rutx11 rms vpn to openvpn wifi not sms trb140 firmware connection - ipsec on rutx12 rutx09 modbus
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When RS485 WAN interface and firewall

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1,150 views 1 comments
by
I have a RUT955 with RS485 running Modbus.    I was trying to close down the firewall so that the port 502 was no longer available on the public IP and only available over VPN.    I've noticed that if WAN is enabled on the RS485 part of the GUI then you cannot see it in the Firewall settings.    Is this correct please?

1 Answer

0 votes
by anonymous
Hi,

By default ports like 502 is closed in router. So there is no need to add rules in firewall to close it.

If you want that only VPN interface can reach your RS485, configure "Allow IP" in Services -> RS232/RS485 -> RS485. These rules will not be visible in firewall WebUI window, but additional rules in iptables is added to control this traffic.
Best answer
by anonymous
thank you, that explains what is going on.  As a comment, it would be less confusing on future versions of the gui if these firewall rules were visible.