While that is still a serious risk, IP packets support a source routing header option header. http://www.networksorcery.com/enp/protocol/ip/option003.htm http:

While that is still a serious risk, IP packets support a source routing header option header. http://www.networksorcery.com/enp/protocol/ip/option003.htm http://www.networksorcery.com/enp/protocol/ip/option003.htm http://www.networksorcery.com/enp/protocol/ip/option009.htm http://www.networksorcery.com/enp/protocol/ip/option009.htm I have no idea how well supported these headers are on the modern internet, but they are still part of the protocol.