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

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unable to access a NAT'ed IP via a VPN on Windows 7

I connect to a range of servers hosted by one provider via a VPN. I can connect to the VPN fine, however when I then go and try and connect to the server(s) it fails. A NAT'ed IP address that has ...
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3answers
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ping: unknown host google.com

Relevant output: /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 ...
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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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2answers
132 views

eth1 and eth1:0 take different times to echo ping requests?

When I ping 2 different IPs that go to eth1 and eth1:0 on the same server, the ping time is the same but the time it takes for the ping result to appear in the terminal is much longer with eth1:0. For ...
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2answers
926 views

Looking for help to ping multiple hostnames on a text file and output certain data to another text file [closed]

I have over 3000 servers I need to ping in my corporate network. I found a way to ping them but I am hoping to find away to output the ping data to another text file or xls file with the hostname, ip ...
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4answers
7k views

Linux router: ping doesn't route back

I have a Debian box which I'm trying to set up as a router and an Ubuntu box which I'm using as a client. My problem is that when the Ubuntu client tries to ping a server on the Internet, all the ...
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1answer
669 views

Pros vs Cons of Rate Limiting ICMP [duplicate]

I am configuring Config Server Firewall and here is the default config for ICMP. I have read on the internet that disabling or limiting ICMP can cause huge headaches on your server. However I have ...
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3answers
4k views

Cannot ping Ubuntu server by hostname

I know this is already asked but I can't find a clear answer. I put a new Ubuntu server in my LAN and I can't ping it but the hostname. I don't want to edit all my LAN windows hosts's file (+40 pcs) ...
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2answers
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nmap does not find alive hosts with ping scan

I try to ping scan my local network using nmap, but it doesn't seem to find machines that are for sure alive. It responses to ping but on to ping scan. Results for ping: $ ping 192.168.0.2 PING ...
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3answers
181 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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1answer
384 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
2k views

Can't ping from my Amazon EC2 instance running Windows Server 2008 R2

I have been searching for a while, but it seems like most people have same issue but in the other direction. Meaning that the can't seem to ping their Server. I am trying to use putty to access my ...
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Windows 2003 VPN, client connected to server, but can only ping part of servers

My Windows 2003 server has an integrated ethernet card as well as a dlink card. Using "Configure your server wizard", I successfully created a VPN server. The server IP is : 192.168.123.1 and ...
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0answers
1k views

Calculating the round trip time for ping packets

I am currently practicing for my network & communications course and have managed to confuse myself slightly on a question about packet round trip time. I have made a start but am now a bit stuck! ...
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3answers
147 views

Odd ping result on network

Can anyone explain why when I ping 192.168.23.019 it gives me a reply from 192.168.23.17? Then If I ping .23.19 I get a request timed out reply. But I can RDP onto .23.19 These are virtual machines.. ...
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2answers
95 views

LAN to LAN VPN connectivity issues

I have a route-based VPN with limited functionality. My computers on site-A can ping one workstation on site-B, it happens to be the only workstation that is not part of the domain that has been ...
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1answer
555 views

VM can't ping localhost on ESXi 4

I have some problem, i have 3 VM (vm1, vm2, and vm3). vm1 is normal. ping to internal and external is OK, DHCP is OK. but vm2 and vm3 very strange. DHCP is OK but can't ping to internal and external. ...
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1answer
441 views

Change source address on discovery of network devices in System Center Operations Manager 2012

My SCOM server has two network cards. One is normal network while the other is connected to the "switch" VLAN. If I try discovering network devices in SCOM I get "No Response Ping", no matter which ...
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3answers
1k views

Ping only works after about 30 seconds

Today I am working on this issue and I would love your ideas. There is a network with something like this LAN 1 -- WAN CHANNEL--- LAN 2 The LAN 1 have two segments. When I make a ping from LAN 1 ...
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3answers
955 views

Can't Ping host, nmap detects it?

I have a simple question that I'm trying to wrap my head around. I know this requires knowledge of my internal network, but at a glance, what do you guys think.. I cannot ping a host in my network ...
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2answers
2k 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?
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501 views

Why can't my networks reach each other?

We have two Buffalo WZR-HP-G300NH2 routers, with the default firmware, DD-WRT v24SP2-MULTI (10/31/11) std - build 17798. Each has a separate cable internet connection with a public static IP address. ...
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2answers
818 views

While using Nmap and sweep the network with a ping

I'm studying up on using Nmap, and there is a command that sweeps the network with a simple Ping scan to determine which hosts are online. The command is this: 1 [ignore_this]# nmap -sP 10.0.0.0/24 ...
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1answer
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finding live hosts with nmap

I'm trying to find live hosts on the network with nmap: nmap -sP 192.168.3.0/24 Starting Nmap 5.21 ( http://nmap.org ) at 2012-04-10 10:28 EEST Nmap scan report for km-localhost (192.168.3.1) ...
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1answer
58 views

Different network response for indentical co-located machines

We have a situation as follows: We have a two different virtual machines (VMs) on some remote server farm. The machines are identical in terms of hardware/software(OS) configurations. We have a ...
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2answers
564 views

The ping response time doesn't reflect the real network response time

I encountered a weird problem that the response time returned by ping is almost fixed at 98ms. Either I ping the gateway, or I ping a local host or a internet host. The response time is always ...
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2answers
585 views

strange ping start time on Windows 2008 R2 server

I have a 3 computer network connected through a Linksys/Cisco E3000 Router in a small office. One is running Windows 2008 R2 Foundation and the other 2 are running windows 7. When I ping the R2 from ...
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2answers
2k views

Need help troubleshooting highly variable ping times

I'm at work using Citrix (think Remote Desktop) to connect to client sites. With my job I have to write a fair bit of code while I'm connected remotely via Citrix, so the latency of my internet ...
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1answer
130 views

Can't ping site on site's server on Windows Server 2008

I have a few websites that I can't ping from within the server it's on, but other websites that share the same IP I can. I can view and ping all applications outside of the server. The IP is correct ...
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2answers
965 views

Is it bad that latency for our internal LAN varies greatly within the 15 - 40 ms range?

I've always thought the "typical" latency for a small office wired Ethernet network would be <5 ms. However, pinging the default gateway yields an average of 14 ms, and any host is around 30 ms. ...
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1answer
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Destination host unreachable, but the errorlevel is 0 (from a win7) [closed]

From a windows 7 machine, I ping a non existing ip address. C:>ping 192.168.1.222 Pinging 192.168.1.222 with 32 bytes of data: Reply from 192.168.1.222: Destination host unreachable. Reply from ...
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1answer
267 views

solaris + why cant ping to default getway

I have Solaris machine with IP 10.10.10.100 and default getway 10.10.10.1 and subnet 255.255.255.0 remark - solaris machine connected to cisco switch via cross cable and from switch to my laptop I ...
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1answer
290 views

quick check of open port

The following is working as expected. (do not want to use nmap) I need to use nc (or any other built-in centOS) command in shell script to check the port 6379 of a remote server. I want the script to ...
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3answers
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Ping host computer from installed Ubuntu on virtual box

I have installed Ubuntu 11.10 on Virtualbox 4.1.8. My own OS is Windows7 x64. I need having a connection between these operation systems, but there are many choices. NAT, bridge, Host-Only, etc. I ...
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2answers
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Pings from VPN network to VPN client work; pings into from VPN client to VPN network fail - why?

We are in the process of setting up an OpenVPN server for some servers running in a cloud. We are stumped with a connectivity problem whereby the hosts on the VPN server's LAN can ping te VPN client, ...
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3answers
1k views

What is the best server or Ip address to use for prolonged testing?

I usually run uptime/latency tests against (and from) two servers that we own at different sites and until recently I've used the google dns servers as a control group. However, I've realized there ...
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1answer
109 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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2answers
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Ping one interface from the other

I have a computer (running Linux) with 2 interfaces eth0 and eth1. eth0 with address 10.0.0.100/24 eth1 with address 192.168.1.100/24 They are connected to 2 different networks (10.0.0.0/24 and ...
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Why Does Ping's RTT Derive From The Echo Reply?

This is a follow up on Why Doesn't Ping Show RTT? I had a look at BSD, Linux and BusyBox ping implementations. All three share the feature that they calculate the round trip time by sending a ...
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1answer
554 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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1answer
6k views

Loop redirect when ping my gateway

I have a router with WAN and LAN setup and act as DHCP server/gateway on my local LAN. The IP address is 192.168.1.1. Today, I was hit by an internet failure and I checked the ping and get this ...
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406 views

My server doesn't receive responses from pings

if I SSH into my server, and I try to ping another server, I never see the responses. This seems to happen only on urls. I've been able to ping a couple ip addresses. I first noticed this problem ...
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2answers
6k views

PING: timed out, host unreachable and succes all at once

Is there any logical explanation for this output? I can understand all of the three different results, but all three in one single run of PING? Could my router be defective? I have no internet ...
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1answer
475 views

How can I use ping with a large packet size to troubleshoot network issues?

What types of network problems can be identified with ping of a large packet size?
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218 views

Windows Server 2008 Standard, firewall disabled by Group Policy but ports are still filtered

Hihi, So vanilla install of WS2008R2S, disabled FW with GP and trying grab SNMP with another host on the same subnet. The output of both if/ipconfig's and nmap -p 161 is below. Both machines running ...
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2answers
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DELL 6224 switch strange behaviour

I'm having a hard time with my DELL 6224 switch. This switch is the center node of my network, trunking between other switches, VLANs and routing packets. The network traffic that it's been handled ...
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1answer
162 views

ping service making hundreds to thousands of ping type requests per minute, os tweak advice?

If a server is monitoring thousands of endpoints (http, https, ping, etc) and these checks are done every minute, what o/s issues should I be researching? 1K+ requests per minute is what I want to ...
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4answers
6k views

how to check connectivity to server by windows tools?

I need to check if client can connect to server on specific TCP port. Server is listening on it. Tried "telnet server_IP port" but telnet is stuck when I see that it's connected to the server. Seems ...
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1answer
6k views

Can't ping using IPv6 address

My network setup is very simple: two win7-64 machines connected to a switch. IPv6 enabled for their network interface. No router no outside network no DHCP. ipconfig report for the computer shows ...
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1answer
2k views

Icinga/Nagios to ping different machine on local network

I have 3 machines, all remote IPs and all of them running nsclient++ with remote and local IP addresses: 46.*.*.1/192.168.1.1 46.*.*.2/192.168.1.2 46.*.*.3/192.168.1.3 I want nagios/icinga to ...