Many modern Antivirus programs may flag SelfishNet as a "Trojan" or "PUP" (Potentially Unwanted Program) because it uses ARP spoofing techniques. If you trust the source of your download, you may need to whitelist the application.
Even in v0.1 beta, the tool could capture unencrypted traffic. In 2025, most websites use HTTPS, but back in the XP/Vista era, HTTP was rampant. SelfishNet could easily capture login credentials for forums, email accounts (POP3/IMAP without SSL), and FTP servers. selfishnet v0.1 beta
To revert all changes and restore normal internet access to all users, simply close the SelfishNet application. This is an important safety net, as all the "poisoned" ARP entries in the network's cache will gradually be replaced with correct ones. Many modern Antivirus programs may flag SelfishNet as