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

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I can ping IPs, but can't ping any domain

I have a CentOS 6 x86 server. If I ping 8.8.8.8 and my server gateway, there's no problem. If I ping google.com, yahoo.com, etc, it returns "ping: unknown host google.com". When I saw this problem, ...
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1answer
507 views

winsock unable to ping URL but able to ping ip

i have a web app on the server that sends emails with aspemail from persists today it stopped and i get error Winsock error 11004 (0x2AFC) occurred. if i try to ping the host server smtp.gmail.com ...
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2answers
47 views

Windows Web server 2008 [closed]

I have a online Windows web server with Plesk as control panel. I have full access to my server by remote admin. I want to stop the ping attack on server by some people or all. Kindly guide how can I ...
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2answers
818 views

Ping tests reply instantly, but report enormous response times

I'm still attempting to confirm my hypothesis that this problem may be isolated to servers hosted on the same physical Hyper-V host, but certainly at least I've found frequent, though intermittent, ...
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2answers
925 views

How to reduce ping between server over the world?

I have some servers in France and in Hong Kong. Ping is quick to google.com, < 10ms in france, and < 30ms in HK. But ping between these servers is greater than 250ms. This is very slow and very ...
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1answer
229 views

DNS resolves in a wrong way [closed]

I have a simple ping app made in C#. the only thing it does is pinging a host. when I'm running it on my local computers, it works in the way it should, but once I'm moving it to my server, it works ...
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1answer
658 views

ping preload is not permitted, what could be the reason?

I am trying to ping one of my local host and checking CPU process to see how "Ping of death" attack behaves. I tried to ping my other PC which is in local network with 192.168.44.2 IP Address. I tried ...
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3answers
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What does mdev mean in ping(8)?

What does mdev mean in ping output (last row below)? me@callisto ~ % ping -c 1 example.org PING example.org (192.0.43.10) 56(84) bytes of data. 64 bytes from 43-10.any.icann.org (192.0.43.10): ...
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4answers
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Using watch to run a shell script - but the script goes defunct

So I want to keep an eye on my network connectivity so I can make a report for my ISP. (seems like the modem goes out for about 30-60 seconds about once a day) So I copied this handy little script ...
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3answers
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why can't access the site when ping the ip it can get through?

When I used the ping command to test my site, it shows OK. When I access the site with ip or domain(sexylingerietop.com), it shows Unable to connect. I put the site on a vps yesterday. The site ...
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3answers
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Find information for local IP address?

We have had a BT engineer visit recently, trying to solve a problem with our IP phone system. One point they made was that we had four DHCP servers running on the network. I have disabled two of them ...
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2answers
221 views

Latency, Ping and Other Questions [closed]

In a high traffic application, like an online auction system, few ms could determine 'to win or 'to lose' the 'battle'. I'm from Brazil. Here, I 'ping' local sites - like UOL - and receive replies ...
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4answers
1k views

ping https when ICMP is blocked

I working with web servers that ICMP is disabled on them. On the other hand they answer to some https requests. I'm basically looking for http like ping capabilities in order to check if another ...
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2answers
2k views

what IP address can I ping as a watchdog target for load balancer?

I'm setting up a load balancer for my network. I have three options to select as a verification method if WAN is still alive: Link Up (whether a modem is alive). This doesn't work for me because ...
1
vote
1answer
637 views

What is the maximum normal latency for internal gateway switch?

I've been observing the ping latency to my server's internal gateway switch from my server machine. I noticed the ping spikes to as high as 500ms at times. Is this a possible indication that the ...
0
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2answers
543 views

Web Server Can't Ping to Outside/External IP's

I'm having this problem. I'm trying to connect to my datacenter, and It seems that my webserver can't ping to my router, and even can't ping to others pc in my network. Well, I'm new in this ...
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6answers
3k views

Ping based Windows monitoring dashboard

I have 3 servers that I need to (visually) monitor all the time. Currently there is a "method" using 3 ping -t processes running in separate command prompt windows and I am trying to replace it with ...
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0answers
194 views

DHCP gives a 0.0.0.0 subnetmask

I have a fresh Windows 2008 domain with one DC (DHCP, AD, DNS, WDS). Everything worked fine yesterday at the implementation day, but this morning all hell broke loose. Some workstation coudn't ...
5
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2answers
440 views

Why do I get search.com instead of “host not found”?

On my VPSs with LeaseWeb, whenever I reach an non-existent host, I get search.com domain name, and if I ping a non-existent domain from SSH, I don't get "host not found" but replies from IPs like ...
0
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1answer
480 views

VMware Host-Guest intermittent communication on bridged mode

I'm running 2 VMs (Unbuntu & Ubuntu Server), both of them are on bridged mode. The host is a Win7 running VMware Workstation 7. My purpose is to set up a PostgreSQL server on the Ubuntu Server VM, ...
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5answers
4k views

Ping Linux server by hostname inside Windows network?

Can anyone point me in the right direction on what should i do in order to be able to ping a linux server from inside a windows network (with a domain)? I've searched on google and found several ...
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2answers
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Why can't I ping my server?

I am logged onto my Windows Server 2003. I am trying to ping another server that is Windows 2008 by using the command promt and putting in the ip address that I had given it. For some reason it seems ...
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5answers
2k views

Can't ping one server of two by name, but can ping both by IP

I have two database servers where I can ping both by IP, but can only ping by name for one. The setup: Server1 - Original Data Server2 - Receives data from Server1 through replication Server1 can ...
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2answers
2k views

Cannot ping linux (RedHat) machine by hostname

For some reason, a linux (RedHat) machine that I have is not ping-able by hostname! It is ping-able by IP address though. I have the same network configurations as another linux (RedHat) machine ...
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12answers
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Is Ping a reliable way to check if a server is available?

In my application I am pinging a server and waiting for a response. I am using this to determine whether the server is available and responsive or not. Is this a reliable way of determining ...
2
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1answer
526 views

can't ping/ssh new libvirt instance

I have a working virtual host that was Ubuntu-Server Lucid (10.4). I've been using it for a while and has several functional guests created on Lucid. Today I upgraded to Maverick, then to Natty ...
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3answers
3k views

How does ping work when a host name has multiple ip addresses?

For example, google.com has at least these ip: 74.125.225.49 74.125.225.51 74.125.225.81 Does ping just pick one of them randomly?
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2answers
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ping fails but ssh succeeds

I'm facing a situation where one app(using ssh) can connect from Machine A (Linux) to Machine B (windows), whereas Machine A cannot ping Machine B. Another app on Machine A which connects to Machine B ...
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3answers
398 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: http://www.downornot.com/qweop Then I pinged it with JustPing and it is reporting that my website ...
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2answers
535 views

Client can't ping server untill server has first pinged client?

Problem: Client computer can't ping server until the server has first pinged client. If I stop pinging the client from the server, the client will no longer be able to ping the server. Does anyone ...
2
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1answer
2k views

I can't ping my gateway, but I can ssh to a remote server. Why?

I'm trying to configure my dorm room network. I'm working on ubuntu. It seems that the dorm building has a host as gateway 192.168.22.254. My route -n looks like this: Kernel IP routing table ...
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1answer
257 views

What should I do after traceroute?

I have a problem that my server (CentOS 5) cannot connect twitter.com. I've used traceroute command like this: traceroute twitter.com -d -I and I got the following lines: traceroute to ...
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2answers
137 views

measure server speed and deduct the network latency

I want to measure the login via htaccess to some servers (how fast is processed by the server) and I want to ignore the time lost on the newtork. So should i deduct the ping latency once or twice? Or ...
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1answer
1k views

I can't ping from my server to google.com, how can I diagnose issue?

I'm on my server and I can't ping anything outside. I tried for example google.com. How can I diagnose this issue? I can ping my localhost (ping works) This is my traceroute to google.com: ...
0
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3answers
472 views

What are the proper contents of an ICMP message? (Buffer, Don't Fragment, etc..)

I'm creating a Tracert program and am wondering if the value "buffer" used in the Ping payload really matters. Can it be anything, or do routers respond differently based on the contents of the ...
0
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1answer
147 views

Security settings * differences between cmd.exe window and IE

I plan to retrieve an rss file (xml format) with url http://alerts.weather.gov/cap/ma.php?x=0 from a web site periodically with a scheduled task. I have a php script to do that. When I access the ...
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1answer
281 views

ping6 overhead compared to ping overhead

I am testing IPv6 latency from a Linux box, and I noticed this weird difference between IPv4 ping and IPv6 ping: # ping -n -A -q -c 500 speedtest.steffann.nl PING speedtest.steffann.nl (10.3.10.20) ...
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2answers
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Can ping an ip but does not show up in netstat?

I was wondering if someone would be able to help me with a head scratcher. We have a device that has communicated with our server but is not sending back any data. I am able to ping the IP address ...
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1answer
1k views

I'm trying to make a batch file that will ping multiple IP's and return the results in a text file [duplicate]

Possible Duplicate: Batch file to MASS ping group of computers on network by name, check reply, and resolve hostname I am trying to ping many IP's at once and to date it's been done ...
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6answers
726 views

ping response time

I have two sites hosted on two different data-centres. Recently one site has become very slow. The ping response from application server to DB server is not fast enough. How do I investigate the ...
2
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3answers
3k views

IP address of virtual server?

I have a virtual server (shared hosting), with a domain name (and several sub-accounts, each one a separate site also with its own domain name) I was wondering if there was a way to find out the IP ...
0
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1answer
290 views

Can only rdp or ping to Windows 7 machine intermittently

We have a Windows 7 machine that we can only intermittently rdp into or ping. We have tried this from several different machines and run into the same issue. We discovered if you reboot the problem ...
0
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4answers
184 views

Monitoring service that can run scripts

I'm currently using New Relic's performance monitoring service. Works great so far, except that I'd like some things automated. I basically just get an email notification when performance is bad or ...
0
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0answers
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Unable to ping through gre tunnel

I have 4 machines machine 1 has ip address 172.13.0.40/24 machine 2 has two ip address 172.13.0.1/24 and 172.12.0.1/24 machine 3 has two ip address 172.12.0.50/24 and 172.17.0.1/24 machine 4 has ip ...
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2answers
228 views

Can ping by IP, not by domain

I have an Apache2 web server with vhosts at 173.xxx.xxx.xx1, listening on port 80 & 443. One vhost I'm trying to access is dev.REDACTED.com. I can ping the IP of the server: ~: ping ...
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0answers
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cannot ping through gre tunnel

This question has been merged I have 4 machines machine 1 have ip address 172.13.0.40/24 machine 2 have two ip address 172.13.0.1/24 and 172.12.0.1/24 machine 3 have two ip address ...
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11answers
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Will a higher bandwidth Internet connection lower ping response time?

It sounds obvious that a faster connection lowers latency... But I wonder: I am working remotely on a host the other side of the world - light can only travel so fast (1 foot in a nano second) and we ...
2
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2answers
809 views

Ping with long delay but short reported time

What does it mean when a ping reports a reasonable time (~10ms) but actually takes quite a long wall clock time (~15 seconds)? (Additionally, passing the -U option for "full user-to-user latency" has ...
2
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6answers
4k views

Intermittent high ping/latency problem

I have been working with my ISP (which is a WISP, actually Fixed Broadband Wireless) trying to figure out why I intermittently get high latency. The latency is detectable in online games and other ...
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1answer
240 views

Can't connect to server, others can

I've set up a Webserver(port 80) and a Minecraft server. Me and my friends play on this server regularly and haven't had any problems connecting before this. Now, one friend complains about not being ...