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IP Spoofing for Good? Quick question....

IP Spoofing for Good? Quick question....

IP Spoofing for Good? Quick question....

Hello All,
I'm looking for a way to temp spoof a known IP address to test my FTP settings. I have a company from India that needs access to my FTP server with a x.x.x.x/24 block that says they cannot connect. I have the firewall set to restrict to certain IPs and have tested my allow rules with single /32 addresses and /24 blocks and I can make them work on my end. Curious if there is a way to spoof their address so I can prove to them that those IP addresses in that block do work. I'm not asking for a how to, as obviously this info can be used inappropriately but more of a gentle nudge in a direction. Is there a site or software that will perform this testing without setting up some kind of proxy?

Learning - A never ending quest for knowledge usually attained by being thrown in a situation and told to fix it NOW.

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