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nping breaks the speed of light #1795

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wwalker opened this issue Oct 24, 2019 · 3 comments

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@wwalker wwalker commented Oct 24, 2019

mtv-pg-01 is in Mountain View, CA
rcn-pgbkup-01 is in Richardson, TX

They are connected via a Cisco ASA VPN.

RTT at lightspeed with no router delays would be 18 ms.

1700*2/186282.
0.018251897660536177

but nping has reported as little as 0.98 ms. I know it is crazy, but it is repeatable.

wwalker@mtv-pg-01:~ $ sudo nping --tcp -c 25 rcn-pgbkup-01

Starting Nping 0.7.60 ( https://nmap.org/nping ) at 2019-10-24 06:27 UTC
SENT (0.0514s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (0.2289s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=57138 iplen=40  seq=0 win=1480
SENT (1.0519s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (1.2489s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=34969 iplen=40  seq=0 win=1480
SENT (2.0538s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (2.0649s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=47940 iplen=40  seq=0 win=1480
SENT (3.0550s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (3.0849s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=39135 iplen=40  seq=0 win=1480
SENT (4.0570s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (4.1049s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=55254 iplen=40  seq=0 win=1480
SENT (5.0589s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (5.1249s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=40031 iplen=40  seq=0 win=1480
SENT (6.0609s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (6.1449s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=55756 iplen=40  seq=0 win=1480
SENT (7.0629s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (7.1649s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=52310 iplen=40  seq=0 win=1480
SENT (8.0649s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (8.1849s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=35310 iplen=40  seq=0 win=1480
SENT (9.0669s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (9.2049s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=57219 iplen=40  seq=0 win=1480
SENT (10.0689s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (10.2249s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=48015 iplen=40  seq=0 win=1480
SENT (11.0709s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (11.2449s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=34828 iplen=40  seq=0 win=1480
SENT (12.0729s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (12.2649s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=52885 iplen=40  seq=0 win=1480
SENT (13.0749s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (13.0809s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=33732 iplen=40  seq=0 win=1480
SENT (14.0769s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (14.1009s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=44735 iplen=40  seq=0 win=1480
SENT (15.0790s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (15.1209s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=50297 iplen=40  seq=0 win=1480
SENT (16.0810s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (16.1449s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=32925 iplen=40  seq=0 win=1480
SENT (17.0830s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (17.1609s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=54210 iplen=40  seq=0 win=1480
SENT (18.0850s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (18.1809s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=59305 iplen=40  seq=0 win=1480
SENT (19.0869s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (19.2009s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=60785 iplen=40  seq=0 win=1480
SENT (20.0889s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (20.2209s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=39828 iplen=40  seq=0 win=1480
SENT (21.0909s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (21.2409s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=45730 iplen=40  seq=0 win=1480
SENT (22.0928s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (22.2649s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=49954 iplen=40  seq=0 win=1480
SENT (23.0938s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (23.2849s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=44702 iplen=40  seq=0 win=1480
SENT (24.0949s) TCP 10.5.4.42:15426 > 10.7.9.18:80 S ttl=64 id=16044 iplen=40  seq=3535797700 win=1480
RCVD (24.1009s) TCP 10.7.9.18:80 > 10.5.4.42:15426 RA ttl=255 id=59231 iplen=40  seq=0 win=1480

Max rtt: 196.944ms | Min rtt: 5.984ms | Avg rtt: 102.754ms
Raw packets sent: 25 (1.000KB) | Rcvd: 25 (1.150KB) | Lost: 0 (0.00%)
Nping done: 1 IP address pinged in 24.13 seconds
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@wwalker wwalker commented Oct 24, 2019

Another run; with the pcap file :-)

wwalker@mtv-pg-01:~ $ sudo nping --tcp -c 25 rcn-pgbkup-01

Starting Nping 0.7.60 ( https://nmap.org/nping ) at 2019-10-24 06:43 UTC
SENT (0.0717s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (0.2417s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=41034 iplen=40  seq=0 win=1480
SENT (1.0719s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (1.2617s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=37083 iplen=40  seq=0 win=1480
SENT (2.0727s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (2.0778s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=34522 iplen=40  seq=0 win=1480
SENT (3.0738s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (3.0978s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=56862 iplen=40  seq=0 win=1480
SENT (4.0759s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (4.1178s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=41346 iplen=40  seq=0 win=1480
SENT (5.0778s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (5.1417s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=35765 iplen=40  seq=0 win=1480
SENT (6.0787s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (6.1618s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=32940 iplen=40  seq=0 win=1480
SENT (7.0798s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (7.1897s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=43826 iplen=40  seq=0 win=1480
SENT (8.0807s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (8.2138s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=56569 iplen=40  seq=0 win=1480
SENT (9.0818s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (9.2337s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=54449 iplen=40  seq=0 win=1480
SENT (10.0827s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (10.2538s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=54741 iplen=40  seq=0 win=1480
SENT (11.0829s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (11.2737s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=61077 iplen=40  seq=0 win=1480
SENT (12.0836s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (12.0898s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=50413 iplen=40  seq=0 win=1480
SENT (13.0849s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (13.1138s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=42372 iplen=40  seq=0 win=1480
SENT (14.0869s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (14.1338s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=59924 iplen=40  seq=0 win=1480
SENT (15.0878s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (15.1537s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=45486 iplen=40  seq=0 win=1480
SENT (16.0888s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (16.1738s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=46549 iplen=40  seq=0 win=1480
SENT (17.0898s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (17.1977s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=47048 iplen=40  seq=0 win=1480
SENT (18.0908s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (18.2178s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=63530 iplen=40  seq=0 win=1480
SENT (19.0918s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (19.2377s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=53281 iplen=40  seq=0 win=1480
SENT (20.0927s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (20.2578s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=51225 iplen=40  seq=0 win=1480
SENT (21.0929s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (21.2778s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=61169 iplen=40  seq=0 win=1480
SENT (22.0938s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (22.2978s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=47463 iplen=40  seq=0 win=1480
SENT (23.0947s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (23.1138s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=40808 iplen=40  seq=0 win=1480
SENT (24.0969s) TCP 10.5.4.42:61348 > 10.7.9.18:80 S ttl=64 id=34157 iplen=40  seq=3558636023 win=1480
RCVD (24.1338s) TCP 10.7.9.18:80 > 10.5.4.42:61348 RA ttl=255 id=36634 iplen=40  seq=0 win=1480

Max rtt: 203.956ms | Min rtt: 5.043ms | Avg rtt: 102.272ms
Raw packets sent: 25 (1.000KB) | Rcvd: 25 (1.150KB) | Lost: 0 (0.00%)
Nping done: 1 IP address pinged in 24.19 seconds
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@wwalker wwalker commented Oct 24, 2019

@wwalker

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@wwalker wwalker commented Oct 24, 2019

There is some craziness going on in the pcap. Not sure you should try to fix reading this or not.

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