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

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Linux command to wait for a SSH server to be up

I have a script which creates a virtual machine and gives me back an IP address. Then I would like to do something like this: waitforssh 192.168.2.38 && ssh 192.168.2.38 And it will wait ...
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1answer
72 views

How to set up routing tables in EC2, so that ping works

I have a wide open security group which I rely on for instances to be able to connect. I also have a private network of 172.*. addresses, as shown here: What do I need to do in order to allow ...
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2answers
301 views

Can ping google.com, but can't ping cnn.com

I have just upgraded from 10.04 to 12.04. I didn't notice the problem at first. But when installing horde with the pear installer it failed to download all of the packages. So I did a little hunting ...
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1answer
151 views

Low Latency for Google compared to servers located with in my country [closed]

When i ping google.co.in its showing 11.1 ms as average ping www.google.co.in PING www.google.co.in (173.194.36.63) 56(84) bytes of data. 64 bytes from bom04s02-in-f31.1e100.net ...
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1answer
579 views

Ping6 fail on linux

I have 2 linux box configured with IPv4. I have tried adding IPv6 to them. I have issued this commands on box1: ip -6 addr add fd32:2d7f:f3c1::1/48 dev eth0 And I get this: inet6 addr: ...
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180 views

Anomalous behavior of Routers

I am observing anomalous behavior Cisco concerning routers. Scenario 1: Ping from Server A to Cisco Router 1905 - 0.3 ms Ping from Server A through Cisco Router 1905 to Server B - 3.2 ms ...
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3answers
3k views

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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1k views

Cant ping ip on LAN. Port forward works fine though

I have a Solaris 11 machine running inside the LAN. It is a default install. I can access the machine and ping it if I ssh into my router (if it matters, it is running dd-wrt). I cannot ping the ...
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328 views

Cannot connect to computers on same subnet

Newbie question. I have a motorola surfboard router and two computers running windows 7 64bit Pro. Both can connect to the internet fine, but they cannot see each other. I need to remote desktop from ...
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2answers
280 views

Foundry switch doesn't ping

we have one foundry switches, but we cannot ping the switch, but the switch works well, and we can ping any other device connect to it! we reset the switch couple of time, but the problem still ...
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1answer
420 views

Ping 100 ms in one direction 200 ms when opposite

We have 2 independent networks and a few users in network A use remote desktop to get on a terminal server in network B. We set up an IPSec tunnel between the 2. As far as we can tell the bandwidths ...
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2answers
1k views

Monitor status of VPN clients

Is there any better solution than ping -t for monitor status of some VPN clients. I have set up FreeBSD router with fix public IP address for accepting incoming PPTP VPN connections. The callers are ...
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1answer
52 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 ...
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1answer
77 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 ...
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2answers
384 views

Linux router: ping responses going through the wrong interface

I have a Debian server acting as a router for a small network. It has 3 network interfaces, one LAN and 2 WANs (two different ISPs, let's call them A and B, each of them with a public static IP ...
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2answers
137 views

IPv6 address not available from outside

Since Hetzner pretty much doesn't give out any IPv4 addresses, no matter what the reason is, I decided to give IPv6 a try. These is the assigned IP address subnet mask IPs: 2a01:4f8:190:5112:: /64 ...
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2answers
4k views

Fragmentation and packet size,using tcpdump

i am trying to understand concept of fragmentation: i have two virtual machines with public ip connected to a switch. tracepath shows packet not going through gateway from vm1: Trying to send ...
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1answer
135 views

Best practices on lowering latency between two endpoints [duplicate]

I would like to know what tools or what kind of calculation should be made in order to find the lower latency possible between two points physically distant. For example: Ping time from Europe to ...
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2answers
708 views

Can ping out but not in

What are some of the causes of not being able to ping a server? I have a windows 2003 box that I can remote into but I cannot ping it. What I have checked is: The server can ping my desktop ...
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2answers
318 views

Can't ping or remote desktop?

I've setup a win7 laptop and joined a company domain, now I'm unable to ping or remote into the machine. Could someone provide me with some troubleshooting tips please?
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1answer
71 views

How can I be notified when a server comes back up?

So far I've determined that I can use the ping command to send a ping to said server every 15 minutes or so in a command prompt window in Linux like so: ping -i 900 <server-address> The 900 ...
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2answers
350 views

How to configure the name returned from ping?

Currently my Debian-based machine returns whatever name was used to ping it, as it's name when answering to ping: - saturn:~$ ifconfig | grep "inet addr" inet addr:192.168.0.103 ...
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1answer
483 views

Why Doesn't Ping Show RTT?

I'm on OS X 10.7 and just found out, the ping -s 10 host does not work as expected. Its output does not contain the round trip time: PING host (IP): 10 data bytes 18 bytes from IP: icmp_seq=0 ...
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2answers
48 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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1answer
969 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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4answers
2k views

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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1answer
891 views

Why does ping flooding a domain name freezes and not a direct ip address

I am wondering why, when ping flooding a domain, the ping flood freezes after a couple of seconds then continues and this freeze, unfreeze continues until i stop the ping flood. When i do the same ...
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3answers
172 views

Network issues - Windows Server 2003

I am having network issues on my Windows Server 2003. I am running this test: I am pinging my server from remote location constantly (ping -t) I am pinging a stable web site from my server ...
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2answers
310 views

DNS lookup working but nothing pinging

I have three forward lookup zones in my DNS server. When I try pinging a server that's part of lookup zone A from a computer that's part of that same zone, I get a response. If I try pinging a ...
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2answers
7k views

How much packet loss is normal?

I started monitoring our network using SmokePing. Users occasionally complain about bad network connections, but the problems went away after some minutes usually. I now wanted to get some more ...
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2answers
2k views

Ping fails: is a webserver configuration issue or not?

When I ping a dedicated ip on my server I get the following: ping XXX.XXX.95.175 PING XXX.XXX.95.175 (109.72.95.175): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 ...
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4answers
620 views

Can't ping self

I have a wireless internet connection setup on my Mac. (v10.5.6) Am connected to the internet and everything is running smoothly. I recently discovered a quirky behaviour while setting up apache web ...
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177 views

Is asymmetric latency common in practice?

This is a follow-on to a question posted on stack overflow about whether it is possible to determine the one-way latency of a point to point connection without using externally synchronized clocks - ...
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2answers
870 views

Have internet but cannot ping ip address

I'm running 2003 Server and have workstations set up to connect to a terminal services session in order to use software stored on the server. we use a program that connects an external entity with us ...
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2answers
679 views

root domain to www forwarding issue

I want to forward my root domain(yourdomain.com) to www.yourdomain.com Should I delete the A record of the root domain and then setup 301 permanent forwarding to www.yourdomain.com? I am hosting my ...
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1answer
190 views

How to run putty on a particular network adapter

I have a loopback adapter which uses SLIP to communicate to a microcontroller. The issue I have is on Windows I dont know how to run putty on that particular network adapter. Does anyone know how to ...
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2answers
160 views

How do know if I can SSH in servers?

I have over 200 servers, but is hard to keep tracking all of them by some documents, after a while it gets outdated, so to refresh this document, I have to know which servers I can login via SSH. I ...
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1answer
106 views

Is it worth to set up a different network interface for connections to MySQL?

I have a high load website served by two servers: web server with nginx and php, and database server with mysql. Web server serves all the static content and connects to MySQL and outside world ...
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3answers
108 views

Reverse dns returns a different host each time

So, randomly I happened to ping abc.com and found this fascinating: $ ping abc.com PING abc.com (199.181.132.250) 56(84) bytes of data. 64 bytes from m.abc.com (199.181.132.250): icmp_req=1 ttl=237 ...
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How to monitor printer host status with zabbix

I need to monitor host status of printers from zabbix. I managed to monitor the inklevel via SNMP. Any ideas to monitor printer reachable or not ?
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1answer
118 views

Ping Elastic IP Address from Inside Server Fails

I have an EC2 server set up inside a VPC on Amazon. The server is reachable from the outside via its elastic ip address; however, when I attempt to ping that ip from inside the remote desktop ...
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1answer
4k views

Can you ping a Cisco Router's Loopback Interface from a PC using PacketTracer

I may be misunderstanding what you can do with a Router's loopback interface. I am trying to ping it from a PC on the same network. I am using Packet Tracer to simulate this, a Cisco 1841 and a PC ...
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2answers
3k views

Amazon EC2, still cant ping or “http” it

I am new at Amazon Cloud technologies. I ve set up an Amazon Linux instance created my keys and assigned elastic IP. Also, I opened all TCP, UDP, ICMP ports(ok, it's very dangerous, but I am using it ...
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2answers
2k views

Batch - Ping IP and execute different commands on return

I'm trying to make (hopefully a simple) script that when run pings my mobile device. If the mobile is connected to the network it will execute one command and if not it will execute another. I've ...
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1answer
341 views

Ping/traceroute tool for OSX [closed]

Any suggestions for a network monitoring tool for OS X that can do the same functionality like Axence Nettools. Basically, I want to be able to track ping history and view them as a report. Other ...
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1answer
107 views

2 VMs with Win Server 08 - how to ping/connect to a DB?

In the past, I always installed SQL Server on the same machine as the server application that would be using it. Now for the first time I need to install a MS SQL Server 2008 R2 DB instance on a ...
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3answers
1k views

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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1answer
343 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 ...
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1answer
533 views

High ping everywhere except one PC

I have a network with a really high ping (usually more than 500ms) except for one laptop. And in that laptop the ping is usually 5ms. I've tried: - using same model laptop - compare lan driver ...
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3answers
116 views

I want to be notified when a LAN IP goes live

Is there a tool or something that can notify me whenever a local IP goes live on my network. It could be that it continually ping that IP and display a notification to me whenever that IP return a ...