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

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Unable to ping 127.0.0.1 … except as local Administrator

I'm having this issue with two Server 2008 R2 domain member servers built as VMWare guests. The DCs built at the same time do not have this issue. When I try to ping 127.0.0.1 (or "localhost") when ...
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2 servers with 2 ip adresses cant ping each other

I rent 2 root servers from my provider that run Ubuntu 12.04.01 LTS. I ordered a second ip for each of them and configure them in /etc/network/interfaces as follows: iface eth0:1 inet static ...
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Ping to pppoe server fails, while reverse is working

I have created a Linux PPPoE server on CentOS release 5.4 (Final) x86_64 machine (Linux 2.6.18-164.el5 #1 SMP). I have also established the PPPoE connection successfully. However, ping to server from ...
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ping -a sometimes returns host name and sometimes returns FQDN. Why? Does this mean DNS is corrupt somehow?

I have a Windows machine called abcd for example and it uses DHCP to receive an IP address (172.28.45.5 for example) When I perform ping -a 172.28.45.5 sometimes I receive abcd as the hostname. ...
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Setup machines network in Windows Azure

I'm building a web application and I've decided to host it on Windows Azure. My application has three components: A front-end created with Play Framework (machine A) A back-end core written in Java ...
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Windows servers on same gigabit lan switch, what might cause Windows 2008 R2 to have 50% longer ping times than Windows 2003 server?

After installing a brand new HP Proliant DL380e Gen8 running SBS 2011 (Windows 2008 R2 X64) I noticed a difference in response to ping requests on the wired ethernet local LAN, even before the ...
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pinging an unknown hosts from centos resolves

I am seeing very strange behavior with servers running CentOS 6.4 x64. If I run a ping on a host which clearly doesn't exist: ➜ ~ ping sdafsadfdsadfsasdfasdoi.com PING ...
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Setting up 2 IPv6 Subnets and ping across Cisco router [closed]

I am trying to setup 2 IPv6 subnets across a Cisco 2621 Router. I am having some trouble... I have assigned: fe0/0 2607:fcb8:10::x:x:x:x fe0/1 2607:fcb8:11::x:x:x:x On the fe0/0 side I have a ...
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Maximum MTU size

Thought one of the issues I'm experiencing with the following question is due to MTU rightfully so. ESXi 5 VM Putty session hangs, vSphere client timing out However, when I tried testing the ...
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475 views

ping incorrectly pinging 127.0.0.1

I've got an odd DNS issue. I'm running a dual ipv4/ipv6 environment on Gentoo Linux. Pinging some sites results in ping pinging 127.0.0.1. e.g. #> ping authserver.mojang.com PING ...
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I can't ping to my EC2 instance although icmp has been set

I wasn't able to ping to my ec2 server although I've done the following command: ec2-authorize default -P icmp -t -1:-1 -s 0.0.0.0/0 when I try this again it gives me: ...
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Version of Ping that outputs returned Payload?

Is there a version of Ping that has a command line option that outputs the payload returned? If so, can you please point me to it?
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282 views

AWS EC2 instance not pingable or available in browser

I've seen this questions asked other places, but now I've run through every fix proposed in other questions so I'm re asking it here, in hopes that someone will have a different solution. Problem: I ...
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Server 2012 intermittently fails to respond to pings from single host, even with firewall disabled, but responds to non-ICMP requests fine

This one is kind of weird. I've got the following machines involved: DC01 - 10.1.2.42, Server 2012, domain controller & DNS server, physical machine nagiosv - 10.1.2.35, CentOS 6.4, Nagios, ...
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If a server is performing slowly, will ping still appear normal?

I'm trying to troubleshoot an intermittent slow application problem without direct access to the network. There is a server on one network providing webpages to a VLAN on a different network via a ...
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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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Some clients on a VPN network are not reachable

The problem of this model is that some (only some) clients cannot be reached. See the link below for more information about the model which is being described in the upcoming section. Problem ...
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Why 160ms to ping <5miles [closed]

My server is sunnyvale, CA. 2 (64.71.128.221) goes to Cupertino which is close but away from mountain view. The destination is mountain view. It takes 160ms to ping there. I can ping the other side of ...
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openvpn setup ping/routing fail

My problem is that after setting up VPN on a virtual machine (Ubuntu Linux) with that has an IP I cant ping anyone at all over the tun interface from the client. VPN Connection is however successful. ...
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625 views

ICMP echo-reply packets with a much lower TTL (-190) than ICMP time-exceeded packets

When I ping the last three hops of a traceroute path to facebook.com from my location, the ICMP echo-reply packets I get back all have a TTL of respectively 58, 57 and 56. The hops in question are the ...
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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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Continuous ping on proxy preventing https requests, why?

I hope someone can help me solve this mystery. I have a small linux box which is configured as a transparent proxy on my network. I'm trying to run a script at startup that does a continuous ping to ...
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Ping time jumps from 0.9ms to between 11 and 28ms

I have a server with 5 other devices all plugged into a single switch. I can ping all devices with nice low ping times (between 0.6ms and 0.9ms). But, all of a sudden, the ping time to one of the ...
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Router Behavior for MAC Address Change for same IP

+-----------+ +------------+ +---------+ | LAN |eth0 lan0| Router |wan eth0| | | PC |===========| |===========| WAN-PC | | | ...
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Hosted Network Latency

Background I have a new hosted, dedicated database server behind a dedicated firewall (Cisco ASA 5505 Sec+). The plan is to have a virtual (aka "cloud") web server or two on the other side of the ...
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Connect Navicat to Linux server

Im trying to connect to my remote Linux CentOS server with Navicat. If I try to connect with the relevant details it just hangs with "connecting to ...." I've tried to ping the server (with the ...
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How light is a ping?

Hopefully this question isn't too dumb. I'm wondering how expensive (system resource, and bandwidth wise) a ping is. If I have a small embedded linux device that has very limited ram, cpu, and ...
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Cannot ping gateway

I replaced my aging fileserver with a new server running ESXi 5.1 and migrated my fileserver in a virtual machine running on it. Now I have the following problem with this VM: I'm getting the ...
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How to Ping explicitly from eth1 instead of eth0

I'm trying to execute a ping with eth1, but the program uses eth0(the default network device). Any tips, tricks, or alternate techniques available?
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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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Unexplained 0.1% packets time out when pinging from router

I'm troubleshooting a customer who requires the ability to send 5000 pings from the router to their remote site over a satellite link with zero timeouts, yet they keep experiencing one to five packets ...
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Issues connecting to SQL Server

I'm trying to boot up a sitecore application. Got the source code, set up my local IIS, but for some reason I'm getting the following error: A network-related or instance-specific error occurred ...
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Cannot ping, neither can use the server as the DNS. but can ssh to the server from any IP address

I have a server that holds my server services. I'm able to ssh to the server: ssh root@example.com enter password: root@example:# But, I can't ping the server: $ ping example.com PING example.com ...
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OpenVPN run script after tunnel is set up

I'm having a hard time figuring out exactly how can I update my A records on my cloudflare account. I have already set up a script that checks for IP changes, and pushes the changes through the ...
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570 views

Does Linux support IPv4 mapped IPv6 addresses?

I work in a mixed IPv4 / IPv6 environment. I read that IPv4 addresses can be mapped into the IPv6 space with this syntax ::ffff:1.2.3.4 (1.2.3.4 is the IPv4 address) Does Linux support this ...
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239 views

Branch to Branch VPN through HQ router?

I've just upgraded our router and am working my way through setting it up as the old one was. The new router is a Draytek Vigor 3900. We have a number of sites with IPSec tunnels dialling in to our ...
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OpenVPN and one way pings

Network configuration I have set up a network: Appropriate ports of computers in 192.168.87.0/24 are forwarded on TP-LINK router to be seen "all over the world". IP forwarding in enabled on ...
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Unable to ping computers via DNS domain name

I have two desktop computers and recently set up a third computer, a Windows Server 2012 box, for which I installed DNS on it and set it up as a domain controller. I was able to successfully set up ...
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Cisco ASA failover can't ping gateway

I'm currently trying to set up a failover network for my Cisco ASA 55x0 using the SLA traking. I have the "outside" interface (network 89.x.x.48/29) and the "outside2" interface (network ...
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459 views

Hamachi gateway PC responds when pinging remote PCs from internal network

We are using Hamachi to link 2 remote sites together via a gateway VPN network. This generally works fine. At our main office, our SBS 2003 server acts as the DHCP server. The Hamachi gateway client ...
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I cannot ping my guest operating systems via Bridged Network Connection

Here are the details: I am using VMWare Workstation 9.0.1 build-894247. Host - Windows 7 - Firewall is turned on - has static IP Guest OS 1 - Windows Server 2008 R2 - Firewall is turned off - has ...
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Mellanox dual-port HCA, can ping if ib0 pair connected but not if only ib1 pair connected

I have installed 2 mellanox FDR dual-port ConnectX-3 HCA cards (CX354A), each to a separate machines. The machines are connected directly to each other (switchless configuration). Both ports on the ...
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415 views

Server responds to pings but no SSH or HTTP access

I do not know what has caused this but my websites have been down for 2+ days now and I cannot connect via SSH or FTP either. The only way to get signs of life from my server is to reboot it via the ...
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nslookup fails but ping succeeds for nonexistent domains

I have two different FreeBSD servers (different hosting companies), both exhibit this same behavior: They pick a specific IP address (216.239.120.238) for every domain that does NOT exist. nslookup ...
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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. ...
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Can't ping6 a network interface from a different Ubuntu computer

I cannot ping6 the network interface "tun0" on the host computer from a virtual machine. Using vmware, I installed a Ubuntu 12.04 virtual machine, that is connected to the host machine with NAT. ...
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One way ping on an embedded Linux system

I'm facing a networking issue with an embedded Linux system in a private network. We have a network that consists of a few tens of servers connected through a switch with one of the servers acting as ...
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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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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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35 times increased latency between data send rate of 1 millisecond vs 100 microseconds. WHY?

Experiment hping -S --data 100 -c 100 10.56.1.2 -i u100 round-trip min/avg/max = 0.5/14.0/15.8 ms hping -S --data 100 -c 100 10.56.1.2 -i u1000 round-trip min/avg/max = 0.3/0.4/4.8 ms Observation: ...