Here are some Services vulnerable to IP Spoofing: - RPC(Remote Procedure Call services)
- Any service that uses IP address authentication
- The X Window system
- The R services suite
Measures To Prevent Spoofing :
Avoid using the source address authentication. Implement cryptographic authentication systemwide.
Configuring your network to reject packets from the Net that claim to originate from a local address. This is most commonly done with a router.
If you allow outside connections from trusted hosts, enable encryption sessions at the router.