hello i have been asked to help out with some IT needs but have limited equipment making this difficult at the moment
there network is set up like this
internet > router > security gateway > ethernet switch > server acting as dhcp server
the problem is their old IT support has dissapeared and they do not know the username, passwords or any ip address details of either the router or the security gateway.
if i connect to the router via ethernet it will not connect at all so i am guessing that it is not acting as DHCP and i will have to set a fixed ip for the laptop to be able to connect to it. is there any way to find out what the routers ip address is or any advice on how i could connect to it?
the gateway has a wan port connected to the router and a lan port connected to the ethernet switch.
the plan is to replace the gateway (they have another) but without knowing what ip address to assign to the gateway it cannot connect to the router.
any suggestions or ideas on what i could do next would be greatly appreciated.
thank you kindly