Can I somehow change my IP address on the server NOT using a proxy or vpn?

Question

PHP

I tested a number of sites, with different type headers, X-Forwarder-For Remote_addrand so on, on some sites it worked and the ip changed without using a proxy, and on some, my real ip still remains, although it seems to me that I went through all the possible headers where the ip could be, why is that ? How else can they determine ip on the site?

Answer 1

Normal sites do not trust the ip that comes in X-Forwarder-For
Therefore, the only reliable way to change ip is vpn / proxy, since the server always sees the actual address from which the connection was made, as a rule it lies REMOTE_ADDR and cannot be faked.

Answer 2

Add to nokimaro:
You can also use an SSH tunnel.
If the goal is to not have a VPN/proxy inside the system, then you can connect the machine to a physical/virtual router over the local network, which, in turn, is globally connected to a remote host as a proxy/VPN client or uses a remote VPN- the gateway is just for the MAC address of your machine on the local network.
Without using one of the tools above, a real IP change will not occur.