Ubuntu – What does this output from HPing mean

firewallpingtcpipUbuntu

hping command: hping3 -G --rroute $domain -i u1000

Result:

len=80 ip=127.0.0.1 ttl=64 DF id=0 sport=0 flags=RA seq=176 win=0 rtt=0.2 ms
       (same route)
len=80 ip=127.0.0.1 ttl=64 DF id=0 sport=0 flags=RA seq=177 win=0 rtt=0.2 ms
       (same route)
len=80 ip=127.0.0.1 ttl=64 DF id=0 sport=0 flags=RA seq=178 win=0 rtt=0.2 ms
       (same route)
len=80 ip=127.0.0.1 ttl=64 DF id=0 sport=0 flags=RA seq=179 win=0 rtt=0.3 ms
       (same route)

--- 127.0.0.1 hping statistic ---
181 packets transmitted, 180 packets received, 1% packet loss
round-trip min/avg/max = 0.2/0.2/0.6 m

So, my question is, what does packets 1% packet loss, 180 packets received and 181 packets transmitted mean?

Update: Question:2:

Command - hping3 -a $ip -S 127.0.0.1 -p 80 -i u1000


len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4176 win=32792 rtt=0.3 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4177 win=32792 rtt=0.3 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4178 win=32792 rtt=7.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4179 win=32792 rtt=0.3 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4180 win=32792 rtt=0.3 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4181 win=32792 rtt=0.3 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4182 win=32792 rtt=0.3 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4183 win=32792 rtt=0.5 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=0 win=32792 rtt=0.0 ms
len=44 ip=127.0.0.1 ttl=64 DF id=0 sport=80 flags=SA seq=4184 win=32792 rtt=0.3 ms
^C^C
--- 127.0.0.1 hping statistic ---
4186 packets transmitted, 9184 packets received, -119% packet loss

When I run the above command (after update), I get -119% packet loss, i.e. i receive more packets than I sent. How is that possible? Any quickies on that?

Best Answer

I suspect that this means nothing. Did you stop the hping3 command by typing Ctrl+c ? If you did then the most likely explanation is that the 181st packet was sent and that you interrupted the program before the response was received and hping3 is (slightly) exaggerating the results as 180/181 is 99.44% of packets received.

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