Ping is a mechanism to see if a remote host is reachable via an IP network

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2answers
58 views

Can ping by IP address but not by hostname [on hold]

I have 3 Debian VM. 1)DNS 2)DHCP 3)Client DHCP looks ok. I got my fixed-address on DNS and Client like I want. When I try to ping each of them @ip it's responding. If I try to : ping dhcp But I ...
-3
votes
1answer
29 views

Cannot access Amazon EC2, is my site down. What should be done? [closed]

Amazon ec2 instance is shown as running by AWS mgmt console. And my site is http://displayten.com/ I am not able to open the same. I have tried SFTP it gives me timed out. Not able to access using ...
3
votes
3answers
424 views

Why is DownOrNot and JustPing reporting that my website is down?

I was pinging my site with DownOrNot and it is reporting that my website is down from all locations. Then I pinged it with JustPing and it is reporting that my website is also down from all ...
19
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2answers
1k views

Pinging an IP address responds with different IP

When I try to ping the IP address 10.10.208.57 I have no response since nothing exist in the network with that IP address. However if I try to ping 10.10.208.057 instead another IP address responds: ...
1
vote
1answer
51 views

Why is ping not returning local DNS cache result? (Using DNS caching server on an internal network.)

Yet another post about this nslookup works but ping does not. I’ve read a handful of forum posts but could not find anything relevant to my setup and problem, of resolving external domain names on an ...
1
vote
3answers
2k views

Sonicwall NSA2400 - No internet access

We've got a SonicWall NSA2400 configured with a LAN (X0) and a WAN(X1) interface. It was setup and working fine until just recently when a temporary worker changed some settings most likely NAT. We ...
0
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0answers
14 views

Any tools that can detect if the machine is off similar to Softperfect Wi-Fi Guard?

We have an outage of electricity the other day and some machines (static IP) has been turned off. Because the machines are located in different places is very hard to know. It will be good to have a ...
0
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0answers
42 views

Can't ping ubuntu server after reboot. Where to look for possible problems?

After restarting my Ubuntu Server I can't ping it. My hosting (Herzner) allows to boot server with rescue system, so I can access file system and try to fix it. The questions is, where to look for ...
0
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4answers
1k views

NSLOOKUP and NBLOOKUP give one IP address; PING finds another

In a Windows Server 2008 domain the on-site domain controller serves as both DNS and WINS server. It is also a DHCP server. One workstation is used as a platform for all admin of the various servers ...
1
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0answers
40 views

Why does a ping flood wake up a PC, while a single ping does not? [migrated]

I just noticed that when you flood-ping a PC that is in sleep-mode, it will wake it up while a single ping or multple pings per 1 sec does not wake it up. Wake up on lan/wan is enabled. What is the ...
0
votes
3answers
25 views

Ping not answered to hyper-v vw machine and not remote desktop

I got three vhdx files. One for SQL-server, one for AD and the other one is SharePoint. Inside Hypver-v manager, I created three Virutal Machines for those three vhdx files and chose same Internal ...
2
votes
1answer
277 views

Why does an IPv6 route added before virtual machine is started not work

I have an external server at Hetzner with Debian 7 and trying to setup KVM with IPv6 Routing (the same setup works for IPv4 without problems). I have one Ubuntu Server VM with two interfaces which ...
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votes
1answer
30 views

pingdom sacking my site's resources [closed]

It appears that somebody created a pingdom account to ping my site once a minute, and since my website isn't hosted on a very strong server anyway, those requests get heavy and slow down the server, ...
6
votes
3answers
1k views

Why would ping give me fast rtt values, but take a long time for each response to come back?

I've got a bit of a basic networking question here regarding ping. When pinging a particular host on a completely different subnet, I get a response like this: PING myhost.example.com (1.2.3.4) ...
0
votes
0answers
121 views

NewRelic Availability Monitoring of Third Party Service

Background NewRelic offers availability monitoring whereby you can specify a ping URL for an application and have NewRelic send HTTP GET requests to that URL and GREP the response for selected text, ...
2
votes
0answers
68 views

Does a ping to 127.0.0.1 hit the network card? Which RFC / standard states that? [closed]

I recently did an exam where one of the questions stated that you can run ping 127.0.0.1 on a computer to verify if its network card is working. I have already read on multiple sources that this ...
0
votes
2answers
54 views

Transatlantic Ping respond times [closed]

Not sure if this the the right place to ask the question. But has anyone had any experience with ping response times or knows of an good to average response time for transatlantic traffic? we have an ...
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votes
1answer
27 views

How can the Windows 7 sees the Windows 2012? [closed]

I have installed a Windows 2012 Standard Server with Active Directory, DHCP and DNS server in Oracle Virtual Box. It has two Network Adapters (Ethernet and Ethernet 2). These Adapters are in same ...
0
votes
0answers
63 views

Can ping from PC to cisco router's ipv6 address (from LAN side) but can't ping from one pc to other's ipv6 address

PCs are connected to Cisco switch and up link goes to Cisco 1841 router on router LAN side interface f0/0 ip add: 2001:xx:xx:xx:1000::64/120. IPv6 is not enabled. I am not able to give prefix length ...
4
votes
2answers
505 views

Faster way to ping URL than curl [closed]

What would be the fastest way to check whether the specified URL is working? (responding in OK http status code)? For now I'm using curl, but I have bunch of URLs to test in a loop, so I'm looking ...
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votes
1answer
14 views

Finding device network disconnection location (which hop failed) [closed]

If you can't connect to the internet and you know the problem is as simple as one of your devices being disconnected along the line which of the following would you use to find out which? You also ...
2
votes
4answers
7k views

What is the difference between ping and tracert?

I basically know the difference in my head but I'm having trouble formulating it on paper. If someone could tell me a little more detailed explanation about the two I'd really appreciate it. So ...
8
votes
2answers
1k views

Public hosts for ping

For my firewall scripts to determine whether my ISP is up I need a few reliable, geographically distributed addresses to ping. I could just use some major sites like Google, Akamai, etc. But that ...
15
votes
8answers
65k views

Is there any way to ARP ping on Windows?

On Linux and other systems, there is an utility called arping which can be used to send ARP requests ("pings") and show the answers, much like the "ping" utility but using ARP instead of ICMP. Is ...
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votes
3answers
50 views

Web server is working, but ping returns a request timeout for icmp_seq [closed]

these are my current iptables settings: Chain INPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere anywhere state ...
0
votes
0answers
32 views

Find any/first alive host in subnet

I'm trying to find a quick way to check if there are ANY alive hosts in an IP range by pinging them. eg: i don't need to know what hosts are alive, just if one or more is responding to a ping. This ...
2
votes
0answers
39 views

Difference between ping time and time for first ACK answer

While creating a packet performance monitor I come across the follow problem: if I ping a server, I get about 4ms. If I calculate the time between a POST and its first ACK, I get about 25us ...
2
votes
2answers
1k views

Unable to ping my Ubuntu AWS instance

I'm new to AWS, just setup a ubuntu ec2 and I've made a security group which allows me to ssh in and that's about all for now. What do I have to do to make it so I can also ping my instance?
1
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3answers
802 views

Why can't I ping my freshly set up amazon web service EC2 instance?

I was following this tut on how to set up a EC2 instance on Ubuntu but qhen trying to execute ssh command on my IP address, I had an operation Timeout. So I tried to ping it but no chance neither. ...
0
votes
1answer
83 views

ping -a not resolving hostname for one host on Windows 7 client

ping -a 192.168.99.3 does not resolve hostname for vcl.nailit.lab, but does for other hosts on network like pfsense.nailit.lab. nslookup vcl.nailit.lab and ping vcl.nailit.lab work correctly. See ...
0
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0answers
16 views

Automatically start machine if another fails

Is it possible to get a backup server (machine) to automatically start if the main server (machine) fails (i.e. does not longer respond to ping, or something). We're talking physical servers, not ...
2
votes
2answers
8k views

How to ping eth0 from eth1 on my linux machine?

I have a linux machine with 2 ethernet ports(eth0 and eth1). eth0 is connected to a router which assigns it an IP address 192.168.1.2. eth1 is connected to a switch which doesn't have an IP. How do I ...
215
votes
17answers
462k views

Ping a Specific Port

Just a quick sanity check here. Can you ping a specific port of a machine, and if so, can you provide an example? I'm looking for something like ping ip address portNum.
3
votes
1answer
923 views

blocked.domain.gstatic.com - Where could this blocking be?

As of this morning we were having serious issues (partially loaded site with no functionality) accessing Google Drive which we use heavily. Other websites seemed to work fine. This is happening on ALL ...
3
votes
4answers
2k views

Are network and broadcast IPs supposed to respond?

I have a /24 network that is subnetted into a bunch of small chunks. I have recently gone into each router on the network (mostly Cisco) in order to document how this network had been divided. Now ...
0
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0answers
69 views

Getting chunks of high ms when pinging local / external IP addresses?

I am having difficulty identifying what a specific problem with one of your vlaned networks. They have a voip phone which regularly cuts out during long phone calls. I have done several ping tests ...
0
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0answers
56 views

Can't ping hostname, but 'ping -a' resolves

I'm trying to ping a Windows PC through VPN by hostname. WINS is set up on all devices. I only get a reply from some PCs. On devices that can't be ping'd, I can do ping -a to resolve the hostname. For ...
2
votes
1answer
2k views

Server can't ping or connect to self

This SF Answer helped me after nerve's answer below: No network loopback device after security update ubuntu 12.04 Original Question I've been Google-ing and banging my head against the wall for a ...
0
votes
1answer
86 views

VPS can ping host by IP but not by name

My Debian VPS can ping all host by name and IP but there's one host I can't ping by name. Ping by name failed but successful with IP However on my home PC i can ping that host by name and IP. I ...
0
votes
1answer
78 views

Is it possible to offer failover even using DNS round robin? [closed]

A company X has five ips to a given service. $ host www.example.com.br www.example.com.br has address 13.194.4.159 www.example.com.br has address 13.194.4.152 www.example.com.br has address ...
0
votes
2answers
172 views

Fastest way to scan all hosts that are online

I am looking to find all the hosts that are online in a set of networks. I would like to find all hosts that are online in the entire network of 170.10.. (there are ~64K possible hosts). The network ...
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votes
1answer
65 views

First Reply on Ping is Unreachable the rest is okay [closed]

please check this weird ping i'm having What may have caused this problem
3
votes
1answer
282 views

ping: sendmsg: Operation not permitted (sometimes)

On a Ubuntu 14.04 running Haproxy, after a service haproxy reload, Haproxy is suddenly reporting all servers behind it as down. After some digging around, I noticed that ping is not working properly, ...
1
vote
2answers
804 views

Can browse, but can't ping

I am behind a corporate network. I am unable to use git, since it can't resolve server names fatal: Unable to look up someserver.org (port 9418) (No such host is known. ) I can't ping that server ...
0
votes
0answers
76 views

Destination host is unreachable

Points to Note I am installing cloudera 4.6.0 using docker in pseudo distributed mode. I have created two docker containers. One is for hadoop and another is for flume. I linked two containers as ...
2
votes
2answers
84 views

Why Ping starts showing results only after a minute

I am running a Solaris 11 system over a local private network 192.168.100.0/24 and I run ping -s to get continuous ping. From the Gateway to my server I get root@mygateway:~# ping -s 192.168.100.42 ...
0
votes
2answers
128 views

extreme ping latency in WDS network

I have setup a wireless network at work office with the following config: 192.168.1.1: TP-Link 941 Router, Root AP, connected to internet 192.168.1.2: TP-Link 901 AP, WDS Repeater, connected to ...
2
votes
1answer
416 views

Cannot ping to localhost into CentOS

I'm connecting to my server (Centos 7) with ssh and I try to ping to localhost: ping 127.0.0.1 but doesn't work: ping 127.0.0.1 PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data. ^C --- 127.0.0.1 ping ...
1
vote
2answers
695 views

Icinga change ping check interval from service and http

I have Icinga installed on a machine with the basic configuration and we just use the Host Status Detail screen with a big monitor only to know when a machine is down due to network/eletrical ...
0
votes
0answers
53 views

Bad ping results while testing 6000 TCP clients with 18 mbytes/s total traffic on Windows Web Server 2008

The clients are running on the machine #1. The server is installed on the machine #2. The machines have a gigabit connection through a switch on their private vlan. There are no errors in the switch ...