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ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It is available for virtually all operating systems that have networking capability, including most embedded network administration software.

The command-line options of the ping utility and its output vary between the numerous implementations. Options may include the size of the payload, count of tests, limits for the number of network hops (TTL) that probes traverse, interval between the requests and time to wait for a response. Many systems provide a companion utility ping6, for testing on Internet Protocol version 6 (IPv6) networks, which implement ICMPv6.

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The ping utility was written by Mike Muuss in December 1983 during his employment at the Ballistic Research Laboratory, now the US Army Research Laboratory. A remark by David Mills on using ICMP echo packets for IP network diagnosis and measurements prompted Muuss to create the utility to troubleshoot network problems.[1] The author named it after the sound that sonar makes, since its methodology is analogous to sonar's echolocation.[1][2] The backronym Packet InterNet Groper for PING has been used for over 30 years,[timeframe?] and although Muuss says that from his point of view PING was not intended as an acronym, he has acknowledged Mills' expansion of the name.[1][3] The first released version was public domain software; all subsequent versions have been licensed under the BSD license. Ping was first included in 4.3BSD.[4] The FreeDOS version was developed by Erick Engelke and is licensed under the GPL.[5] Tim Crawford developed the ReactOS version. It is licensed under the MIT License.[6]

In cases of no response from the target host, most implementations display either nothing or periodically print notifications about timing out. Possible ping results indicating a problem include the following:

In case of error, the target host or an intermediate router sends back an ICMP error message, for example host unreachable or TTL exceeded in transit. In addition, these messages include the first eight bytes of the original message (in this case header of the ICMP echo request, including the quench value), so the ping utility can match responses to originating queries.[8]

The Identifier and Sequence Number can be used by the client to match the reply with the request that caused the reply. In practice, most Linux systems use a unique identifier for every ping process, and sequence number is an increasing number within that process. Windows uses a fixed identifier, which varies between Windows versions, and a sequence number that is only reset at boot time.

The payload may include a timestamp indicating the time of transmission and a sequence number, which are not found in this example. This allows ping to compute the round trip time in a stateless manner without needing to record the time of transmission of each packet.

The payload may also include a magic packet for the Wake-on-LAN protocol, but the minimum payload, in that case, is longer than shown. The Echo Request typically does not receive any reply if the host was sleeping in hibernation state, but the host still wakes up from sleep state if its interface is configured to accept wakeup requests. If the host is already active and configured to allow replies to incoming ICMP Echo Request packets, the returned reply should include the same payload. This may be used to detect that the remote host was effectively woken up, by repeating a new request after some delay to allow the host to resume its network services. If the host was just sleeping in low power active state, a single request wakes up that host just enough to allow its Echo Reply service to reply instantly if that service was enabled. The host does not need to wake up all devices completely and may return to low-power mode after a short delay. Such configuration may be used to avoid a host to enter in hibernation state, with much longer wake-up delay, after some time passed in low power active mode.[citation needed]

Hello @Johnie To be able to test this using ping, perhaps temporarily, go to Security & SD-WAN > Configure > Firewall and in the "Security Appliance Services" section type in "Any" in the ICMP Ping box, save, and re-test. Not sure if that was what you were after, sorry if I misunderstood. There is also support documentation regarding Error 789 here: _VPN/Troubleshooting_Client_VPN

Is there anything else upstream, perhaps an ISP modem/router/gateway that might be blocking the ping? I can in general do an nslookup on the dynamic-m DNS names of my MX appliances and see the correct IP returned that matches the public IP address of the MX, and I can ping both that IP and the DNS name. Perhaps something else upstream is blocking the ICMP packets.

You can run an ICMP packet capture on the outside interface of the MX, go to Network Wide > Packet Capture to set that up, select the MX appliance, select the "Internet" interface, and in the filter expression box, type "icmp" and click start. See if the pings (from outside your network) are even coming into the MX's outside interface in the first place, and let's go from there. If they are not, something is blocking ping from coming into the MX from the ISP side, and if the pings are coming in, and you also see the MX responding, then something is blocking the responses.

Ping has provided regular FCPA and anti-corruption advice to multinationals during mergers and acquisitions, advised companies on compliance risks of proposed transactions, and assisted with revamping and upgrading internal controls and risk mitigation measures.

Verifies IP-level connectivity to another TCP/IP computer by sending Internet Control Message Protocol (ICMP) echo Request messages. The receipt of the corresponding echo Reply messages is displayed, along with round-trip times. ping is the primary TCP/IP command used to troubleshoot connectivity, reachability, and name resolution. Used without parameters, this command displays Help content.

You can also use this command to test both the computer name and the IP address of the computer. If pinging the IP address is successful, but pinging the computer name isn't, you might have a name resolution problem. In this case, make sure the computer name you're specifying can be resolved through the local Hosts file, by using Domain Name System (DNS) queries, or through NetBIOS name resolution techniques.

I just got my new xr1000 router today.... It's been 6 hours now and I've only had a headache. So far, at least the geofilter has managed to set my location. Of course, nothing else happens. The ping heatmap doesn't work either, and it doesn't even include Valorant... Well, in my own opinion, this router probably won't even reach the medium gaming router. But by no means high-end (but of course the price show that). Not to mention having to wait minutes to change 1-1 settings, a long seconds to move from one menu item to another. Big disappointment. And even though I've been on the line with advanced support for more than 2 hours, of course they can't help. For this kind of money, I shouldn't have to wait for constant synchronization. Because as I read the forums, this is the problem many times. But that doesn't help in most cases either.

Regarding Ping Heatmap, I've spoken to the team and we'll see if we can get Valorant added for you. I suspect the reason it hasn't already been added is because all of the information for server locations and ping is available in the game.

I have an ICX 7150-C12 that should be viewable in unleashed. Unleashed sees the switch enough to auto populate its info (MAC, IP, Model/Name), but is unable to complete the connection. It only shows failed to ping ICX [IP ADDRESS]. Suggest checking network.

For anyone looking, symptoms were that the Unleashed device could not ping the Ruckus Switch, and the Ruckus Switch could not ping anything on its own subnet. Installing the SPS firmware did the trick - thank you so much!

I'm sure you recognize that ping is a common and relatively simple command. And, like many basic commands, there are some great options and techniques that make the tool even better. This article explores various tricks and tips to level up your ping knowledge.

By default, Linux sends continuous pings. Windows, by default, only sends four. One of my favorite uses of ping is to inform me when a remote server or network device has restarted. For example, imagine I'm remotely connected to a Windows server from my Linux laptop. The server needs to be rebooted before I can continue with its configurations. I can issue the reboot command and then set up a continuous ping from my laptop to the server. When the ping results show success, I know the reboot process on the remote machine has been completed. In the meantime, I can work on other projects.

I've already uncovered some good uses for ping with the above options. I particularly like the ability do a quick name resolution query. I've used the continuous ping during reboots trick more than any other, however.

You can use the ping command to test name resolution services, too. If you ping a destination by IP address, and the ping succeeds, you know you have basic connectivity. If you ping the same destination by hostname, and it fails, you know name resolution is not working. This is because ping could not resolve the given hostname to an IP address in the second test.

The timeout message indicates that your machine believes it successfully sent ping queries to the destination. However, it did not receive replies within a specified time, so it "timed out." The misconfiguration is likely on the destination end or on the network between your machine and the destination. Your machine sent the queries, but the destination failed to reply. Start by checking that the destination device is on, physically connected to the network, and has a valid IP address. Verify router and firewall configurations after that. ff782bc1db