what ip address do i ping to see if i have internet
Pinging an IP address
This article explains how to ping an IP address for a device. The goal of pinging a device is to find out if a device is reachable at a particular IP address.
Ping is a computer network administration utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the circular-trip time for messages sent from the originating host to a destination computer.
A device on a computer network should respond to a echo request (ping) with an echo reply (pong) confirming it is online. This reply should come within milliseconds. If a reply does not come up information technology is said to have "timed out" because the predefined wait time for a respond has been exceeded. If no reply is seen we typically assume that no device is present at, or assigned with, that IP address.
Getting connected
For the purposes of this commodity we will use a calculator running Windows vii. Other Microsoft operating systems since Windows XP will use approximately the same procedure.
Connectedness is made via an Ethernet cable either direct betwixt your calculator's NIC and the Biamp device via a crossover cable, or via a network switch to a Biamp device on a network. Either connexion blazon volition allow you to Ping the device'due south presumed accost and see if a device responds from that location.
cmd.exe
Begin past going to the Windows outset menu.
Blazon the messages "cmd" into the Search box and hitting Enter.
This volition inquire the Windows OS to run cmd.exe, normally referred to as the "Command Prompt" interface. The post-obit window should open up on your desktop.
Ping
The Command Prompt allows various commands and queries to be sent to the system. For a Biamp device with the default IP address you lot will utilize the command " ping 192.168.1.101 ". If the device is at a different IP address, replace 192.168.1.101 with the accost you are trying to poll.
Afterward you lot hit Enter the request will exist sent four times, generating either a time out failure or a answer with round trip statistics.
To effort again, hit the UP arrow central once to refresh the last command, then Enter.
Failures can present in a few ways, here is what yous might expect to come across back:
Two Ping failures are shown with slightly unlike feedback but no response from the intended device.
Check the cabling, ensure the concrete path to the device is sound, and try again.
Success!
4 responses with practiced, quick response times.
Continuous ping
Use the command " ping 192.168.1.101 -t " to initiate a continuous ping. Again, replace the IP address with 1 specific to your device as needed. The -t can be placed before or later the IP address.
Interrupt the pings with Ctrl-Intermission to see statistics on the captures.
Terminate the pings with Ctrl-C.
" ping –t 192.168.1.101 >PingLog.txt " will output the ping results to a txt file called "PingLog.txt", it will not show a scrolling trace in the cmd prompt window. It will exist placed in the C:\Users\username directory. Change the file name and so each is unique. Pings will happen once a 2d. command-C volition end the ping and close the file.
Things you can ping
Ping is non limited to nearby hardware, you lot tin can as well ping websites.
A ping to google.com
Or ping your own NIC.
Note that the maximum round trip time for your ain NIC is typically nearly 0ms.
Ping a range of IP addresses
In some situations you need to ping a device but don't know where information technology lies within the subnet range. This method can aid narrow down the list of addresses existence used.
In Windows, open the command prompt (Windows get-go carte > Search > type "cmd")
Fast ping fourth dimension
From the command prompt, type....
for /50 %i in (i,ane,254) do @ping 192.168.1.%i -w 10 -north 1 | find "Answer"
This will ping all addresses from 192.168.1.1 to 192.168.one.254 one time each, look 10ms for a respond (more than plenty time on a local network) and show merely the addresses that replied.
Variables:
- Change the IP address after @ping to reflect your network's IP range.
- Syntax for for /50 is (beginning,step,end) if you want to change the range to scan.
- The -w ten tells information technology to just wait 10 ms for a respond before moving on. If your network is irksome you will have to increase this value or have it out all together, although this will make information technology very slow.
- The vertical line character before find is typed as shift-\ on the Windows keyboard.
Besides, note that the Windows find is case sensitive, so make sure yous capitalize "Reply" or you won't get whatever output. Optionally you lot tin can just type "eply" and it volition automatically add the upper-case letter R in the response.
Longer ping time
This is the same as above, with the -w variable changed to permit a 100ms reply window.
for /l %i in (ane,one,254) exercise @ping 192.168.i.%i -w 100 -due north i | find "Reply"
This will ping all addresses from 192.168.ane.one to 192.168.one.254 one fourth dimension each, wait 100ms for a answer and testify just the addresses that replied.
Ping from a specific NIC
To specify the source interface to employ, apply the -southward selection. (You use the interface number, not the IP address). To identify the NIC interface number apply the command " netsh int ipv4 show interfaces "
To force IPv4 or IPv6, employ -4 or -6.
To ping 192.168.0.1 using ipv4 from interface 1, use the command " ping -four 192.168.0.1 -s 1 "
Ping to test MTU size
A standard ping parcel is 32 bytes. The ping command supports a length (-l, lowercase L) aspect which allows you to define the ping bundle size. This allows you to test the maximum packet size you can ship betwixt ii devices. The -f aspect sets a Don't Fragment (DF) flag in the packet (IPv4-only) which keeps the package size intact.
Multiple pocket-sized TCP packets may be aggregated by a switch to optimize manual speed and latency. If the aggregating switch builds a packet of 1500 bytes and the manual path has another switch which only allows a maximum of 1492 bytes the packet volition exist lost en route, as it will not be able to pass the restriction. The lowest MTU (maximum transmission unit of measurement) seen on a path will be the restriction. All switches on a path should allow the aforementioned MTU size.
A ping package contains some overhead data, 20 bytes are reserved for the IP header and 8 bytes are allocated to the ICMP Echo Request header. Add together these 28 bytes to the length value you specify to become the total packet size. E.g. For a total package size of 1500 bytes you lot would subtract 28 bytes from 1500 for a length of 1472
" ping 192.168.0.1 -f -l 1472 "
Success looks like a standard ping response, failure yields the message " Parcel needs to exist fragmented but DF fix."
C:\WINDOWS\System32>ping 192.168.0.1 -f -fifty 1472
Pinging 192.168.0.1 with 1472 bytes of data:
Respond from 192.168.0.1: bytes=1472 time<1ms TTL=64
Reply from 192.168.0.ane: bytes=1472 time=1ms TTL=64
Reply from 192.168.0.1: bytes=1472 time=5ms TTL=64
Answer from 192.168.0.1: bytes=1472 time=1ms TTL=64
Ping statistics for 192.168.0.1:
Packets: Sent = 4, Received = four, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 5ms, Average = 1ms
C:\WINDOWS\System32>ping 192.168.0.1 -f -l 1550
Pinging 192.168.0.ane with 1550 bytes of data:
Packet needs to be fragmented but DF gear up.
Parcel needs to be fragmented but DF fix.
Packet needs to be fragmented but DF gear up.
Bundle needs to be fragmented just DF ready.
Ping statistics for 192.168.0.one:
Packets: Sent = iv, Received = 0, Lost = four (100% loss),
Pathping
The pathping command is a combination of ping and tracert using ICMP letters. Information technology can be a helpful tool for testing a routed path betwixt devices.
" pathping 192.168.0.1 "
ARP
To notice the MAC address of the device at a specific address you can send the arp -a control followed by the IP address of the device.
Alternately, you tin can arp for all devices on the network using but the arp -a command.
PowerShell
Open PowerShell (in the Windows bill of fare search bar type 'Powershell') and copy / paste these commands with the advisable IP address for the device under test.
If lines paste in contrary guild using right-click it may be necessary to enable paste using CTRL+V in the PowerShell properties Options tab.
Continuous Ping
Y'all can use Wndows PowerShell to create a continuous ping test.
Ping.exe -t 192.168.ane.101
You lot can use Wndows PowerShell to create a logged continuous ping test.
Ping.exe -t 192.168.1.101 | ForEach-Object {"{0} - {1}" -f (Go-Date),$_} | Tee-Object C:\Temp\ping-192-168-one-101.log -Append
The continuous ping will run until the PowerShell window is closed. The log output will wait like this (intermediate log data has been cut out)
12/22/2021 3:51:31 PM - Pinging 172.thirty.41.56 with 32 bytes of information:
12/22/2021 3:51:31 PM - Reply from 172.thirty.41.56: bytes=32 time<1ms TTL=64
12/22/2021 iii:51:32 PM - Reply from 172.30.41.56: bytes=32 time<1ms TTL=64
12/22/2021 3:51:33 PM - Reply from 172.30.41.56: bytes=32 time<1ms TTL=64
...
12/28/2021 11:05:04 AM - Reply from 172.30.41.56: bytes=32 time=1ms TTL=64
12/28/2021 11:05:05 AM - Reply from 172.xxx.41.56: bytes=32 fourth dimension=1ms TTL=64
12/28/2021 11:05:06 AM - Reply from 172.30.41.56: bytes=32 time=1ms TTL=64
12/28/2021 11:05:07 AM - Reply from 172.30.41.56: bytes=32 time<1ms TTL=64
12/28/2021 11:05:07 AM -
12/28/2021 11:05:07 AM - Ping statistics for 172.30.41.56:
12/28/2021 11:05:07 AM - Packets: Sent = 498410, Received = 498410, Lost = 0 (0% loss),
12/28/2021 11:05:07 AM - Guess round trip times in milli-seconds:
12/28/2021 xi:05:07 AM - Minimum = 0ms, Maximum = 124ms, Average = 0ms
Open TCP port test
You can do a unproblematic one time examination of a port using the following control, exist sure to enable HTTPS in Tesira Device Maintenance'due south Network Settings if a "true" event is desired::
Test-NetConnection -Port 443 -ComputerName 192.168.ane.101 -InformationLevel Detailed | Format-List *
You lot can run an extended test of an open port using this command set up. This example runs for 720 minutes (12 hours) testing the port using TCP one time a minute and logging success (true) or failure (imitation) with the date and time.
$timer = new-timespan -Minutes 720
$clock = [diagnostics.stopwatch]::StartNew()
while ($clock.elapsed -lt $timer){
$command=Test-NetConnection -Port 443 -ComputerName 192.168.1.101 -InformationLevel Quiet | ForEach-Object {"{0} - {1}" -f (Get-Date),$_} | Tee-Object C:\Temp\cheque-192-168-1-101-port-443.log -Append
cls
$command
get-go-slumber -seconds 60
}
write-host "Timer terminate"
The continuous port test will run until the timer expires or the PowerShell window is closed. The log output will look similar this (intermediate log data has been cut out)
12/28/2021 9:00:15 AM - True
12/28/2021 nine:01:15 AM - Truthful
12/28/2021 9:02:15 AM - True
12/28/2021 9:03:15 AM - Truthful
12/28/2021 9:04:xv AM - True
12/28/2021 9:05:15 AM - True
12/28/2021 9:06:15 AM - True
12/28/2021 9:07:15 AM - True
12/28/2021 9:08:15 AM - True
12/28/2021 9:09:15 AM - True
12/28/2021 ix:10:16 AM - True
A exam for multiple open TCP ports on 1 or more devices tin be run using the script below.
# Biamp Tesira port test
#
# Outputs a unique log file for each IP accost saved in C:\Temp\PortTest-$Ipaddr.log
# To save one file per port per device edit the ii appearances of C:\Temp\PortTest-$Ipaddr.log to C:\Temp\PortTest-$Ipaddr-$Port.log
# Output reports results bear witness in existent-time in Powershell window
# If a device/port fails to respond it will delay the next test as Test-NetConnection retries the device
#
$Ports = 22,23,fourscore,443,61451 #TCP ports to exam
# 22 SSH, 23 Telnet, 80 HTTP (open if HTTPS is activated), 443 HTTPS, 61451 Tesira discovery and communication
# for models that do not support HTTP/HTTPS ports fourscore and 443 can be omitted
#
$Ipaddrs = '172.xxx.41.50', '172.xxx.41.53', '172.30.41.54' # IP addresses to exam
#
$timer = new-timespan -Minutes 10 # test elapsing
# Elapsing of test in minutes 240 = iv hrs, 480 = 8 hrs, 720 = 12 hrs, 960 = 16hrs, 1200 = 20 hrs, 1440 = 24 hrs, 2880 = 48 hrs, 4320 = 72 hrs
#
$clock = [diagnostics.stopwatch]::StartNew()
Foreach ($Ipaddr in $Ipaddrs){ # open welcome message
"Begin $timer examination period for $Ipaddr ports $ports"| ForEach-Object {"{0} - {i}" -f (Get-Engagement),$_} | Tee-Object C:\Temp\PortTest-$Ipaddr.log -Append
} # shut welcome message
while ($clock.elapsed -lt $timer)
{ # open examination flow
$elapsed = $clock.elapsed
$sofar = $elapsed.ToString("hh' hrs 'mm' min 'ss' sec'")
$i++
#
Foreach ($Ipaddr in $Ipaddrs){
"Examination flow elapsed time $sofar for $IPAddr. Examination wheel $i" | ForEach-Object {"{0} - {1}" -f (Become-Appointment),$_} | Tee-Object C:\Temp\PortTest-$Ipaddr.log -Suspend # notes how long test has run so far
Foreach ($Port in $Ports){
$portelapsed = $clock.elapsed
$portsofar = $portelapsed.ToString("hh'h'mm'm'ss\.ff's'")
if
(Test-NetConnection -ComputerName $Ipaddr -Port $Port -InformationLevel Placidity -WarningAction SilentlyContinue)
{"Laissez passer $Ipaddr Port $Port is Open up at elapsed time $portsofar"| ForEach-Object {"{0} - {1}" -f (Get-Engagement),$_} | Tee-Object C:\Temp\PortTest-$Ipaddr.log -Append}
else
{"---- $Ipaddr Port $Port is UNREACHABLE at elapsed time $portsofar" | ForEach-Object {"{0} - {one}" -f (Get-Date),$_} | Tee-Object C:\Temp\PortTest-$Ipaddr.log -Append}
}
}
start-sleep -seconds lx #Time to wait between port scan tests
} # shut test period
Foreach ($Ipaddr in $Ipaddrs){ # open completed test bulletin
"Test period duration $timer is complete for $Ipaddr later $i tests"| ForEach-Object {"{0} - {ane}" -f (Get-Date),$_} | Tee-Object C:\Temp\PortTest-$Ipaddr.log -Suspend
} # close completed exam bulletin
$i = 0 # reset count
write-host "All tests completed." # completed test message, for terminal only
Trace route
Trace road or trace route with hop latency. The -Hops variable limits how many hops are shown.
Test-NetConnection 172.thirty.41.50 -traceRoute
or
Test-NetConnection 172.30.41.l -traceRoute -Hops 10 | select-object TraceRoute | foreach-object {test-connection $_.TraceRoute -count 1}
Source: https://support.biamp.com/General/Networking/Pinging_an_IP_address
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