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Is UDP easy to spoof?
So while it is non-trivial, it is possible. The packet structure for UDP, and the enclosing packets for reference. This is IP-spoofing. Unless you ISP is a dodgy russian one, it will probably prevent you from doing that (the first router will just drop the packet because it is suspicious).
Can you fake a specific IP address?
Yes it is possible for IP addresses to be falsified (also known as spoofing). In order to spoof an IP address, a user alters the source of a packet (information sent between computers) so as to appear to be sent from a different location than the actual location. Learn more about IP spoofing.
Are IP spoofers illegal?
IP spoofing is illegal in many countries. A variety of government agencies, including the FBI and NSA, monitor traffic as a means to identify potential threats against computer systems. This includes any forged packets or other efforts to disguise IP addresses.
How easy is it to spoof a public IP address?
Spoofing the source address is fairly easy, there are still many ISPs that don’t implement source address filtering. Receiving the replies to those spoofed packets is harder. The attacker would need to either get on the network path between client and server or modify routing to change the network path.
How to spoof the IP address in a UDP packet?
In order to do that, I want to send UDP packets to query for information about the application, but using a spoofed IP source. Here is the packet I’m trying to send: I’ve tried doing this with scapy, but it looks like the packet is not received on the other side, where I have tcpdump listening for UDP packets on port 7777.
Is it possible to fake the source IP address?
The source IP address is part of the packet it is sent in. So you would have to modify the packet it is enclosed in. So while it is non-trivial, it is possible.
Is it possible to spoof an IP address to an ISP?
Let’s say the store’s ISP is Apple Networks, and their IP range is 1.2.3.0 to 1.2.3.255. You note that and get home. Your home network is from Avocado Networks, and their IP range is 2.3.4.5. You change your IP to 1.2.3.123 and wait. Nothing happens. You cannot access any site. You are offline. But why? Routing.
Is it possible to send a single UDP packet with an outer IP address?
Your ISP offers you a dynamic ip-address (for example 123.123.123.123). Is it possible to send a single udp-packet with an outer source-ip (for example 124.124.124.124) to a fixed-ip server?