[dns-operations] ``Ya.com says "The internet is mine" ''
rick.jones2 at hp.com
Wed Aug 9 16:29:21 UTC 2006
Peter Dambier wrote:
> Rick Jones wrote:
>>I wonder what would happen if a helpful TCP stack, upon recieving a SYN
>>segment destined to a port without an active LISTEN endpoint decided to
>>complete the connection anyway to send-back some sort of helpful - "Did
>>you really mean to connect to port <mumble>?" rather than a RST or
>>silence? Or better still, a UDP datagram arriving for a port without an
> ICMP does exactly that since the beginning of the internet.
Not that my analogies above were rock solid, but I don't think that an
ICMP coming back is _quite_ the same as completing the TCP connection or
sending a UDP datagram in response to one destined a non-listening port.
IMO, the ICMP coming back is more like the negative reply to the DNS query.
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