open-rpc-ports.txt

2018-10-20 19:30 UTC

## Trial 1

Nmap done: 8440 IP addresses (4486 hosts up) scanned in 446.64 seconds

$ grep Ports.*/tcp/ NODE_SCAN_RESULTS.data -c
4486

$ grep Ports.*/open/tcp/ NODE_SCAN_RESULTS.data -c
944

$ grep Ports.*/closed/tcp/ NODE_SCAN_RESULTS.data -c
2208

$ grep Ports.*/filtered/tcp/ NODE_SCAN_RESULTS.data -c
1334

In [1]: 4486 == 944 + 2208 + 1334
Out[1]: True

In [2]: 944 / 4486
Out[2]: 0.2104324565314311

## Trial 2

nmap only thought about half of the nodes were up, which is plausible
but maybe nmap's online detection is preventing it from looking at some
nodes with open ports.  Add -Pn (treat all hosts as online) to nmap
parameters and try again.

Nmap done: 8440 IP addresses (8440 hosts up) scanned in 177.69 seconds

$ grep Ports.*/tcp/ NODE_SCAN_RESULTS.data -c
8440

$ grep Ports.*/open/tcp/ NODE_SCAN_RESULTS.data -c
1121

$ grep Ports.*/closed/tcp/ NODE_SCAN_RESULTS.data -c
2333

$ grep Ports.*/filtered/tcp/ NODE_SCAN_RESULTS.data -c
4986

In [1]: 8440 == 1121 + 2333 + 4986
Out[1]: True

In [2]: 1121 / 8440
Out[2]: 0.13281990521327014