Fastest way to ping a network range and return responsive hosts

Question

Constraints  1  Speed matters  2  I am allowed to ping once     I m debating whether to use Python or shellscripting  Is there a method faster than bash   Here is the current code   for ip in   seq int1 int2   do     ping -c 1 xxx xxx xxx  ip   grep  bytes from   amp  done   Anything faster than this

User · Accepted Answer

You should use NMAP   nmap -T5 -sP 192 168 0 0-255

User · Answer

This script runs on Git Bash  MINGW64  on Windows and return a messages depending of the ping result      bin bash   1 should be something like  19 62 55   if   -z   1      then     echo  No identify of the network supplied  i e  19 62 55  else     ipAddress  1      for i in  1  256   do                          ping -w 5  ipAddress  i            result   echo                 amp  gt   dev null           if    result   0    then             echo Successful Ping From    ipAddress  i         else             echo Failed Ping From    ipAddress  i         fi  amp        done  fi

User · Answer

This is python code for the ping in range of the 192 168 0 0-192 168 0 100  You can change for loop as you comfort     - - coding  utf-8 - - import socket import os import sys  up ip      list to store the ip-addresses of server online for x in range 100     here range is 0-100  You can change the range according to your comfort      server ip    192 168 0    str x      print  Trying  server ip      n       rep   os system  ping -c 1     server ip       if rep    0          up ip append server ip          print                      Server Is Up                   n      else          print  server is down  n   print up ip

User · Answer

Try both of these commands and see for yourself why arp is faster  PING  for ip in   seq 1 254   do ping -c 1 10 185 0  ip  gt   dev null       -eq 0    amp  amp  echo  quot 10 185 0  ip UP quot         done ARP  for ip in   seq 1 254   do arp -n 10 185 0  ip   grep Address       -eq 0    amp  amp  echo  quot 10 185 0  ip UP quot         done

User · Answer

The following  evil  code runs more than TWICE as fast as the nmap method  for i in  1  254   do  ping 192 168 1  i -c 1 -w 5   gt  dev null  amp  amp  echo  192 168 1  i   amp    done   takes around 10 seconds  where the standard nmap  nmap -sP 192 168 1 1-254   takes 25 seconds

User · Answer

BSD s  for i in   seq 1 254   do  ping -c1 -W5 192 168 1  i   dev null  amp  amp  echo  192 168 1  i   amp    done

User · Answer

Try this for a unique list   ping -c 5 -b 10 10 0 255   grep  bytes from    awk    print  4      sort   uniq  another method  fetches live hosts    fping -ag 192 168 1 0 24

[linux] Fastest way to ping a network range and return responsive hosts?

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