Send a ping to each IP on a subnet

Question

Is there a command line based way to send pings to each computer in a subnet  Like  for int i   1  i  lt  254  i        ping 192 168 1 i     to enforce arp resolution

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This is a modification of  david-rodr  guez-dribeas answer above  which runs all the pings in parallel  much faster  and only shows the output for ip addresses which return the ping   export COUNTER 1 while    COUNTER -lt 255   do     ping  1 COUNTER -c 1 -w 400   grep -B 1  Lost   0   amp      COUNTER      COUNTER   1    done

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This is a modification of  david-rodr  guez-dribeas answer above  which runs all the pings in parallel  much faster  and only shows the output for ip addresses which return the ping   export COUNTER 1 while    COUNTER -lt 255   do     ping  1 COUNTER -c 1 -w 400   grep -B 1  Lost   0   amp      COUNTER      COUNTER   1    done

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bin sh  COUNTER  1  while    COUNTER -lt 254   do  echo  COUNTER  ping -c 1 192 168 1  COUNTER   grep  ms   COUNTER      COUNTER   1    done   specify start number like this    ping sh 1  then run another few instances to cover more ground  aka one at 1  another at 100  another at 200  this just finds addresses quicker  will only print ttl info when an address resolves

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Not all machines have nmap available  but it s a wonderful tool for any network discovery  and certainly better than iterating through independent ping commands      nmap -n -sP 10 0 0 0 24  Starting Nmap 4 20   http   insecure org   at 2009-02-02 07 41 CST Host 10 0 0 1 appears to be up  Host 10 0 0 10 appears to be up  Host 10 0 0 104 appears to be up  Host 10 0 0 124 appears to be up  Host 10 0 0 125 appears to be up  Host 10 0 0 129 appears to be up  Nmap finished  256 IP addresses  6 hosts up  scanned in 2 365 seconds

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for i in   seq 1 254   do ping -c1 192 168 11  i  done

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Under linux  I think ping -b 192 168 1 255 will work  192 168 1 255 is the broadcast address for 192 168 1    however IIRC that doesn t work under windows

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bin sh  COUNTER  1  while    COUNTER -lt 254   do  echo  COUNTER  ping -c 1 192 168 1  COUNTER   grep  ms   COUNTER      COUNTER   1    done   specify start number like this    ping sh 1  then run another few instances to cover more ground  aka one at 1  another at 100  another at 200  this just finds addresses quicker  will only print ttl info when an address resolves

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In Bash shell      bin sh  COUNTER 1  while    COUNTER -lt 254   do    ping 192 168 1  COUNTER -c 1    COUNTER      COUNTER   1    done

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Not all machines have nmap available  but it s a wonderful tool for any network discovery  and certainly better than iterating through independent ping commands      nmap -n -sP 10 0 0 0 24  Starting Nmap 4 20   http   insecure org   at 2009-02-02 07 41 CST Host 10 0 0 1 appears to be up  Host 10 0 0 10 appears to be up  Host 10 0 0 104 appears to be up  Host 10 0 0 124 appears to be up  Host 10 0 0 125 appears to be up  Host 10 0 0 129 appears to be up  Nmap finished  256 IP addresses  6 hosts up  scanned in 2 365 seconds

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Broadcast ping     ping 192 168 1 255 PING 192 168 1 255  192 168 1 255   56 data bytes 64 bytes from 192 168 1 154  icmp seq 0 ttl 64 time 0 104 ms 64 bytes from 192 168 1 51  icmp seq 0 ttl 64 time 2 058 ms  DUP   64 bytes from 192 168 1 151  icmp seq 0 ttl 64 time 2 135 ms  DUP          Add a -b option on Linux

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FOR  L  i in  1 1 254  DO PING 192 168 1  i -n 1 -w 100   for  f  tokens 3 delims      j in   find  i  TTL     do echo  j gt  gt IPsOnline txt

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Under linux  I think ping -b 192 168 1 255 will work  192 168 1 255 is the broadcast address for 192 168 1    however IIRC that doesn t work under windows

User · Answer

Not all machines have nmap available  but it s a wonderful tool for any network discovery  and certainly better than iterating through independent ping commands      nmap -n -sP 10 0 0 0 24  Starting Nmap 4 20   http   insecure org   at 2009-02-02 07 41 CST Host 10 0 0 1 appears to be up  Host 10 0 0 10 appears to be up  Host 10 0 0 104 appears to be up  Host 10 0 0 124 appears to be up  Host 10 0 0 125 appears to be up  Host 10 0 0 129 appears to be up  Nmap finished  256 IP addresses  6 hosts up  scanned in 2 365 seconds

User · Answer

Under linux  I think ping -b 192 168 1 255 will work  192 168 1 255 is the broadcast address for 192 168 1    however IIRC that doesn t work under windows

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The command line utility nmap can do this too   nmap -sP 192 168 1

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The command line utility nmap can do this too   nmap -sP 192 168 1

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for i in   seq 1 254   do ping -c1 192 168 11  i  done

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I just came around this question  but the answers did not satisfy me  So i rolled my own   echo   seq 254    xargs -P255 -I  -d    ping -W 1 -c 1 192 168 0     grep -E   0-1          Advantage 1  You don t need to install any additional tool Advantage 2  It s fast  It does everything in Parallel with a timout for every ping of 1s   -W 1    So it will finish in 1s    Advantage 3  The output is like this    64 bytes from 192 168 0 16  icmp seq 1 ttl 64 time 0 019 ms 64 bytes from 192 168 0 12  icmp seq 1 ttl 64 time 1 78 ms 64 bytes from 192 168 0 21  icmp seq 1 ttl 64 time 2 43 ms 64 bytes from 192 168 0 1  icmp seq 1 ttl 64 time 1 97 ms 64 bytes from 192 168 0 11  icmp seq 1 ttl 64 time 619 ms    Edit  And here is the same as script  for when your xargs do not have the -P flag  as is the case in openwrt  i just found out   for i in   seq 255   do  ping -W 1 -c 1 10 0 0  i   grep  from   amp  done

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Broadcast ping     ping 192 168 1 255 PING 192 168 1 255  192 168 1 255   56 data bytes 64 bytes from 192 168 1 154  icmp seq 0 ttl 64 time 0 104 ms 64 bytes from 192 168 1 51  icmp seq 0 ttl 64 time 2 058 ms  DUP   64 bytes from 192 168 1 151  icmp seq 0 ttl 64 time 2 135 ms  DUP          Add a -b option on Linux

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In Bash shell      bin sh  COUNTER 1  while    COUNTER -lt 254   do    ping 192 168 1  COUNTER -c 1    COUNTER      COUNTER   1    done

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Broadcast ping     ping 192 168 1 255 PING 192 168 1 255  192 168 1 255   56 data bytes 64 bytes from 192 168 1 154  icmp seq 0 ttl 64 time 0 104 ms 64 bytes from 192 168 1 51  icmp seq 0 ttl 64 time 2 058 ms  DUP   64 bytes from 192 168 1 151  icmp seq 0 ttl 64 time 2 135 ms  DUP          Add a -b option on Linux

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I came late but here is a little script I made for this purpose that I run in Windows PowerShell  You should be able to copy and paste it into the ISE  This will then run the arp command and save the results into a  txt file and open it in notepad     Declare Variables  MyIpAddress  MyIpAddressLast    Declare Variable And Get User Inputs  IpFirstThree Read-Host  What is the first three octects of you IP addresses please include the last period    IpStart Read-Host  Which IP Address do you want to start with  Include NO periods    IpEnd Read-Host  Which IP Address do you want to end with  Include NO periods    SaveMyFilePath Read-Host  Enter the file path and name you want for the text file results    PingTries Read-Host  Enter the number of times you want to try pinging each address     Run from start ip and ping  Run the arp -a and output the results to a text file  Then launch notepad and open the results file Foreach  MyIpAddressLast in  IpStart   IpEnd    MyIpAddress  IpFirstThree  MyIpAddressLast     Test-Connection -computername  MyIpAddress -Count  PingTries  arp -a   Out-File  SaveMyFilePath notepad exe  SaveMyFilePath

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for i in   seq 1 254   do ping -c1 -t 1 192 168 11  i  done   Adding a -t 1 waits only one second before exiting  This improves the speed a lot if you just have a few devices connected to that subnet

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The command line utility nmap can do this too   nmap -sP 192 168 1

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Broadcast ping     ping 192 168 1 255 PING 192 168 1 255  192 168 1 255   56 data bytes 64 bytes from 192 168 1 154  icmp seq 0 ttl 64 time 0 104 ms 64 bytes from 192 168 1 51  icmp seq 0 ttl 64 time 2 058 ms  DUP   64 bytes from 192 168 1 151  icmp seq 0 ttl 64 time 2 135 ms  DUP          Add a -b option on Linux

User · Answer

Not all machines have nmap available  but it s a wonderful tool for any network discovery  and certainly better than iterating through independent ping commands      nmap -n -sP 10 0 0 0 24  Starting Nmap 4 20   http   insecure org   at 2009-02-02 07 41 CST Host 10 0 0 1 appears to be up  Host 10 0 0 10 appears to be up  Host 10 0 0 104 appears to be up  Host 10 0 0 124 appears to be up  Host 10 0 0 125 appears to be up  Host 10 0 0 129 appears to be up  Nmap finished  256 IP addresses  6 hosts up  scanned in 2 365 seconds

User · Answer

FOR  L  i in  1 1 254  DO PING 192 168 1  i -n 1 -w 100   for  f  tokens 3 delims      j in   find  i  TTL     do echo  j gt  gt IPsOnline txt

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I would suggest the use of fping with the mask option  since you are not restricting yourself in ping   fping -g 192 168 1 0 24   The response will be easy to parse in a script   192 168 1 1 is alive 192 168 1 2 is alive 192 168 1 3 is alive 192 168 1 5 is alive     192 168 1 4 is unreachable 192 168 1 6 is unreachable 192 168 1 7 is unreachable       Note  Using the argument -a will restrict the output to reachable ip addresses  you may want to use it otherwise fping will also print unreachable addresses   fping -a -g 192 168 1 0 24   From man      fping differs from ping in that you can specify any number of targets   on the command line  or specify a file containing the lists of targets   to ping  Instead of sending to one target until it times out or   replies  fping will send out a ping packet and move on to the next   target in a round-robin fashion    More info  http   fping org

User · Answer

Under linux  I think ping -b 192 168 1 255 will work  192 168 1 255 is the broadcast address for 192 168 1    however IIRC that doesn t work under windows

User · Answer

In Bash shell      bin sh  COUNTER 1  while    COUNTER -lt 254   do    ping 192 168 1  COUNTER -c 1    COUNTER      COUNTER   1    done

User · Answer

I would suggest the use of fping with the mask option  since you are not restricting yourself in ping   fping -g 192 168 1 0 24   The response will be easy to parse in a script   192 168 1 1 is alive 192 168 1 2 is alive 192 168 1 3 is alive 192 168 1 5 is alive     192 168 1 4 is unreachable 192 168 1 6 is unreachable 192 168 1 7 is unreachable       Note  Using the argument -a will restrict the output to reachable ip addresses  you may want to use it otherwise fping will also print unreachable addresses   fping -a -g 192 168 1 0 24   From man      fping differs from ping in that you can specify any number of targets   on the command line  or specify a file containing the lists of targets   to ping  Instead of sending to one target until it times out or   replies  fping will send out a ping packet and move on to the next   target in a round-robin fashion    More info  http   fping org

User · Answer

I just came around this question  but the answers did not satisfy me  So i rolled my own   echo   seq 254    xargs -P255 -I  -d    ping -W 1 -c 1 192 168 0     grep -E   0-1          Advantage 1  You don t need to install any additional tool Advantage 2  It s fast  It does everything in Parallel with a timout for every ping of 1s   -W 1    So it will finish in 1s    Advantage 3  The output is like this    64 bytes from 192 168 0 16  icmp seq 1 ttl 64 time 0 019 ms 64 bytes from 192 168 0 12  icmp seq 1 ttl 64 time 1 78 ms 64 bytes from 192 168 0 21  icmp seq 1 ttl 64 time 2 43 ms 64 bytes from 192 168 0 1  icmp seq 1 ttl 64 time 1 97 ms 64 bytes from 192 168 0 11  icmp seq 1 ttl 64 time 619 ms    Edit  And here is the same as script  for when your xargs do not have the -P flag  as is the case in openwrt  i just found out   for i in   seq 255   do  ping -W 1 -c 1 10 0 0  i   grep  from   amp  done

User · Answer

The command line utility nmap can do this too   nmap -sP 192 168 1

User · Answer

for i in   seq 1 254   do ping -c1 -t 1 192 168 11  i  done   Adding a -t 1 waits only one second before exiting  This improves the speed a lot if you just have a few devices connected to that subnet

User · Answer

In Bash shell      bin sh  COUNTER 1  while    COUNTER -lt 254   do    ping 192 168 1  COUNTER -c 1    COUNTER      COUNTER   1    done

User · Answer

I came late but here is a little script I made for this purpose that I run in Windows PowerShell  You should be able to copy and paste it into the ISE  This will then run the arp command and save the results into a  txt file and open it in notepad     Declare Variables  MyIpAddress  MyIpAddressLast    Declare Variable And Get User Inputs  IpFirstThree Read-Host  What is the first three octects of you IP addresses please include the last period    IpStart Read-Host  Which IP Address do you want to start with  Include NO periods    IpEnd Read-Host  Which IP Address do you want to end with  Include NO periods    SaveMyFilePath Read-Host  Enter the file path and name you want for the text file results    PingTries Read-Host  Enter the number of times you want to try pinging each address     Run from start ip and ping  Run the arp -a and output the results to a text file  Then launch notepad and open the results file Foreach  MyIpAddressLast in  IpStart   IpEnd    MyIpAddress  IpFirstThree  MyIpAddressLast     Test-Connection -computername  MyIpAddress -Count  PingTries  arp -a   Out-File  SaveMyFilePath notepad exe  SaveMyFilePath

[networking] Send a ping to each IP on a subnet

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