Is it possible to accurately determine the IP address of a client in java servlet

Question

I want to configure a machine in my network to accept all calls from a specific machine without authentication. For this I am planning to use the IP address of the client ma

Answer 1

You could be locally susepitable to ARP Spoofing. Where a malicious machine convinces the router to associate the IP address with it's MAC address.

The level and mechanism of trust really depends on the sensitivity of the server/service you are trying to protect and the environment you are operating in.

It looks to me that this is a local arrangement given the private IP address 192.168 range. If this server is not public facing, not critical and you are operating in a relatively secure LAN environment that's well shut off from the public and other private LANS then you should be OK. Otherwise you should look at other security options at a higher level.