Practically yes, you can spoof it but it won't help in too many situations. The IP protocol specifies that each IP packet must have a header which contains the IP address of the source of the packet.

How to change your IP address? | The easiest way to spoof Nov 21, 2017 How to Spoof IP Address & How to Proxy Your IP Geo Part II of Geolocation IP Changing – How To Spoof IP Address. The following free means of how to spoof IP address will be sufficient to change your IP geo-location in most simple circumstances. These free proxies will allow you to visit websites anonymously, research prices in other countries, or send emails from a web based email account without disclosing your geolocation IP.

Email spoofing - Wikipedia

Needless to say, if you spoof your originating IP address, you will never get past the synchronization stage and no HTTP information will be sent (the server can't send it to a legal host). If you need to test an IP load balancer, this is not the way to do it.

A lightweight MAC address spoof software for Windows, MadMAC comes with a compact and a moderate graphical user interface. In order to spoof the MAC address you simply need to choose the network card interface, input the MAC address manually and then eventually save the settings to bring the change to the MAC address.

IP Source Address Spoofing IP source address spoofing is the process of intentionally configuring an IP address to impersonate another host or device on the network. This type of action is typically performed by a malicious actor attempting to circumvent access control restrictions that it … Addressing the challenge of IP spoofing | Internet Society