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

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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 ...
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1answer
522 views

Is this normal that api-verify.recaptcha.net points to google.com?

A user just emailed me saying he could not complete registration in my website. I just checked and already found out it's the recaptcha that is causing the problem. I have been using this recaptcha ...
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2answers
2k views

arp -n responds with (incomplete) on the wrong subnet, can't remove it

context There are 2 servers: server1 - eth0 10.129.76.16 eth0.2 192.168.0.103 server2 - eth0 10.129.79.1 eth0.2 192.168.62.101 The 192.x.x.x addresses are connected to the ...
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1answer
601 views

With HTTPS-Enforcer chrome extension, a normal ping is answered by different site

I have installed the HTTP-Enforcer chrome extension. Now if I open a terminal and type ping google.com I see: $ ping google.com PING google.com.home (67.215.65.132) 56(84) bytes of data. 64 bytes ...
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1answer
403 views

Cannot ping some PC on VPN

I've set up VPN network between office and shop. Everything seems to be ok except for the fact that I can ping simple devices only. For example, we have scales with TCP/IP interface. So, from the ...
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0answers
447 views

Two servers on the same network can't ping eachother

According to this guide I setup two servers. Now these two servers can't ping each other, this is arp -n result: # arp -n Address HWtype HWaddress Flags Mask ...
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1answer
916 views

Can't ping website but can browse it

I have server with CentOS 6.2 installed. The problem is that i can browse the website on it, but i can't ping it. What can cause this?
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3k views

Ping on centOS resolving instead of returning “unknown host”

On my local machine (Ubuntu) if I were to ping a hostname that is non-existent, the ping command returns $ ping somefakedomain.com.au ping: unknown host somefakedomain.com.au However the same ...
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3answers
4k views

Time to live exceeded, result after pinging the gateway from host in one subnet

I got a server with XenServer 6.0.2 and this server has 3 nic with 3 different ip addresses, because I am using 3 different subnet The first 2 card are working and from the first 2 subnet I have ...
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0answers
974 views

Ping starts, then immediately fails, to just one device on a network of 70+ and only from one part of the network! Super confusing

long-time reader first-time poster. I managed a network of 70 odd PCs connected to 3x different network switches (3 buildings all next door to each other). Looks like this: BUILDING 1 SWITCH -> ...
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1answer
242 views

Mac Mini Server network connection issue

We have a Mac Mini connected to our network and are using it as our mail server which works fine. The issue is that we have a photocopier/scanner connected to the network and we can't send scan a ...
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0answers
86 views

Unable to ping one machine on the network

I have one machine on the network that can't be pinged (by name or IP) or accessed with WMI by other machines on the network. So far I have tried: Disabled firewall and AV Put onto a workgroup then ...
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2answers
272 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
135 views

What is causing ping sweep?

I am spotting ping sweeps on our firewall log originating from our Windows 2003 SP2 x64 server. The traffic shows sequential pings sent to private ranges only. Eg: 192.168.1.1 192.168.1.2 192.168.1.3 ...
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2answers
695 views

Ping mystery (Comcast) [closed]

Update 2: Obviously, Comcast support's solution is to ask me to reboot the modem. They say they cannot answer more directly, because -- I kid you not -- tech support does not have access to the ...
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2answers
2k views

IP address used by nslookup and ping is different

I have a web server hosted in the network. It has a domain name registered. However, I also host a DNS server for the LAN. So, when someone wants to access the web server, it would check the DNS ...
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661 views

Ping returns 100% from VM guest, returns sporadically on host

I have an interesting situation on my network right now. I have a 10.1.1.x space that I have a few dozen static IPs on (servers, etc.) and a 10.1.4.x space where we have other machines (DHCP-fed user ...
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1answer
342 views

ping with line numbers

Simple question: how to make ping on Linux to show line numbers in output? I mean: 1 64 bytes from www.site.com (2.7.1.1): icmp_req=1 ttl=247 time=17.9 ms 2 64 bytes from www.site.com (2.7.1.1): ...
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1answer
228 views

Odd ping results : another device answers the ping

On my LAN network 192.168.0.x. My computer is linked to a small Netgear router 192.168.0.19. On some ping requests, I get an answer from the router, not from the actual server. On several requests ...
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2answers
67 views

giving no response of pinging from one but give response from other machine [closed]

Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.141.148.253 0.0.0.0 255.255.255.255 UH 0 0 0 eth0 14.1.0.0 ...
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1answer
1k views

Permissions to Ping over an interface

My server is running CentOS 6. I have a Sprint Broadband device connected as ppp0. This connection has a tendency to need restarted, so I'm trying to monitor it with Nagios (this is used for other ...
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1answer
259 views

How does the ping command differentiate between its ICMP responses and anothers?

If I have two shells open each pinging the same host, how do the two shells differentiate between the ICMP responses coming back for each shell?
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496 views

ICMP ping size stops working at 1272 bytes

I am pinging between two servers. These are both connected with 100Mbps ethernet NICs to the same switch. As you can see from the results below, I can ping from one to the other giving an ICMP data ...
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1answer
253 views

I am unable to connect to my netbook from any machine on my network until the netbook has pinged it

I have a rather strange issue with my netbook on my local network. When trying to connect to it in any way from a remote system it does not appear to find it. However if I get the netbook to ping the ...
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1answer
151 views

Ping hidden-master.yahoo.com [closed]

I am on windows 7 OS. tried the following command at the command line ping hidden-master.yahoo.com Following is the output:-- C:\Users\bilbo>ping hidden-master.yahoo.com Pinging ...
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514 views

SBS 2011 on different subnet than domain computers

The setup is as follows: SBS 2011 in datacentre on subnet A Domain PCs at another location on subnet B There is a site-to-site VPN. The domain PCs have joined the domain and have the SBS as their ...
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2answers
2k 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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1answer
870 views

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
2k views

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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1answer
1k 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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2answers
129 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
741 views

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

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
4k 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
427 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
3k 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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3k views

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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169 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
263 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
839 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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184 views

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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771 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
139 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
91 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
426 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
319 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
598 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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670 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
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?
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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
404 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 ...