ping all the machines in the network

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# 1  
Old 10-08-2007
ping all the machines in the network

Is there any option for the utility "ping" , which can ping all the machines in the network?
# 2  
Old 10-08-2007
I came to knw that "fping" can do this. The following info I got by googleing: But this command is not working in Redhat linux.

fping is a program which uses the Internet Control Message Protocol (ICMP) echo request to determine if a host is up. fping is different from ping in that you can specify any number of hosts on the command line, or specify a file containing the lists of hosts to ping. Instead of trying one host until it timeouts or replies, fping will send out a ping packet and move on to the next host in a round-robin fashion. If a host replies, it is noted and removed from the list of hosts to check. If a host does not respond within a certain time limit and/or retry limit it will be considered unreachable.

Basically fping is meant to be used in shell scripts and its output is easy to parse. This command can be very useful to when you have to scan whole network for alive or unreachable hosts. In case of usage regular ping command you'll have to write shell script and parse each hosts icmp replies but fping can do the same in one line:

To scan range of IP addresses from to just run:
sudo fping -s -g -r 1

That will output:

Code: is alive is alive is unreachable is unreachable is unreachable is unreachable is unreachable is unreachable is unreachable

9 targets
2 alive
7 unreachable
0 unknown addresses

14 timeouts (waiting for response)
16 ICMP Echos sent
2 ICMP Echo Replies received
0 other ICMP received

0.05 ms (min round trip time)
0.44 ms (avg round trip time)
0.84 ms (max round trip time)
2.183 sec (elapsed real time)

In order to scan /24 network (254 hosts) and show only alive hosts the following command can be used:

sudo fping -a -q -g

Last edited by rbatte1; 09-05-2016 at 10:40 AM.. Reason: Added CODE tags
# 3  
Old 10-08-2007
fping is great tool, almost as cool as hping2 Smilie
fping needs to be installed. Donwload the latest version, "configure" and "make install" as root. For such purpose you can use "nmap" as well.
nmap sample report as follows :
Starting Nmap 4.20 ( Insecure.Org - Nmap Free Security Scanner, Tools & Hacking resources ) at 2007-09-08 08:30 Pacific Daylight Time :
Host ( appears to be up.
etc .......
Nmap finished: 256 IP addresses (116 hosts up) scanned in 8.375 seconds
Use this tools with permission from your network admins, otherwise this may not be appreciated.
# 4  
Old 10-08-2007
Some hosts will respond to a ping sent to the broadcast address of a subnet.
# 5  
Old 10-15-2007
thanks Porter,,
# 6  
Old 10-16-2007
Just an FYI.
Not sure about all, but some AV software packages like Panda Internet Security; Block ICMP Echo Requests.
Puts my mates in a spin, they can see me but can't ping me Smilie

Err ... that on a Windows platform.

Last edited by Cameron; 10-16-2007 at 09:36 AM.. Reason: Windows ref.
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