Windows network confusion
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Hi
I am playing around with a poptop box on an Ubuntu server at home. While testing the connection to the VPN server I got this very interesting result when pinging the IP, which was assigned to me by pptpd:
C:\>ping 192.168.0.210
Pinging 192.168.0.210 with 32 bytes of data:
Reply from 192.168.0.210: bytes=32 time=4ms TTL=128
Reply from 192.168.0.210: bytes=32 time=-4ms TTL=128
Reply from 192.168.0.210: bytes=32 time<1ms TTL=128
Reply from 192.168.0.210: bytes=32 time=-4ms TTL=128
Ping statistics for 192.168.0.210:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = -4ms, Average = 1073741823ms
Some weird quantum physics going on? :)
2 Comments
mhz
May 9th, 2008
at 1:43pm
Looks like the server is sending more than one response to your echo request, and your second one gets an answer before asking the question…
…maybe the server is bored, and tired of answering the same set of 3 questions all the time, so it just goes YEAH YEAH, I know there’s two more coming after this…BLAH BLAH echo right back at you.
…or maybe the network is so good that the server can SENSE and anticipate the requests from the client. In that case I wonder if they patented the process. You should quit your job and study this. If you can be the one to patent it, it’ll be worth it.
awarberg
May 13th, 2008
at 12:04am
Haha that would be worth something. I think that ping packets are sequentially numbered and that the local interface ACK’s received pings. Maybe there is some race condition?