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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]

The ping binary sensor platform allows you to use ping to send ICMP echo requests. This way you can check if a given host is online and determine the round trip times from your Home Assistant instance to that system.This sensor is enabled by default. The default polling interval is 30 seconds.

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.

Please Help Me! I use the file "NSVPX-ESX-13.1-30.52_nc_64.ovf" to build my citrix environment. After the initialization is successful, I can open his web management page as shown below, and I can also ping this ip address, but I fail to ping the gateway of this citrix device from the inside. I wonder What is it? What is the reason, thank you very much. I am not sure if I need to provide any additional information. If you need any more detailed information to analyze my problem, please provide it for me and I will publish it. Thank you very much for your help and support

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.

Very similar this uses ping instead of http, don't know if that is more reliable on iPhone as I don't have one.

Also it allow you to customise the frequency a bit more which may help depending on your WiFi reach etc

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.

To further confuse the issue, from the CLI I can ping the default route configured for the RD both in and out of the RD, e.g 10.10.10.1 = OK and 10.10.10.1%4 = OKBut trying to ping one of the members this fails on the RD config, 10.10.10.50=OK, 10.10.10.50%4 = FAIL.

The problem arose due the default gateway being a Checkpoint firewall that was dropping the ICMP echo-replies as it did not see the originating echo-requests as they went direct! If this had just been a basic router the traffic would have completed it's jurney back to the F5, albeit by a different path than the outbound echo-request.

This module is part of ansible-core and included in all Ansibleinstallations. In most cases, you can use the shortmodule nameping even without specifying the collections keyword.However, we recommend you use the Fully Qualified Collection Name (FQCN) ansible.builtin.ping for easy linking to themodule documentation and to avoid conflicting with other collections that may havethe same module name. e24fc04721