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

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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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1answer
201 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
87 views

Will I get banned or blocked for running a diagnostic app?

This may seem like a simple question. Hopefully it will have a simple answer. I run an internet radio station. There are 3 machines. Music source client Stage server Master server (relays the ...
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2answers
308 views

Nmap scans the host but cannot ping the host [closed]

My laptop is connected to a network where we have routers with filters. I can use nmap to scan alive hosts and I can see open ports (mostly port 80). But then, when I try to ping those hosts, I dont ...
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1answer
405 views

IPv6: ping6 from foreign host works, but cannot ping6 on same host [ubuntu 12.04]

I have a strange issue with ipv6 on Ubuntu 12.04. There are two hosts, directly connected to the internet. Both have assigned a /64 network. They are properly configured with a /128 endpoint each and ...
0
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1answer
171 views

Ping sometimes resolves the name, sometimes not

Is this a normal behavior, that ping sometimes displays the server name, sometimes only the IP? OS: Ubuntu 12.10 ~# ping development.example.local PING development.example.local (192.168.0.25) ...
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0answers
1k views

Cannot Ping or Resolve DNS Internally; Externally works fine

I have an issue where I cannot seem to access a subdomain from within the same server: I can ping, nslookup, etc subdomian.domain.com externally, but from within the server where subdomain.domain.com ...
2
votes
2answers
682 views

arp packet received larger than packet sent, why?

I'm trying to debug a networking issue. During this process, I've noticed that when I try to do an arping, the received arp packets are larger than sent arp packets, as outputted by tcpdump. (Note ...
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2answers
385 views

ping and identify Cisco model without physical access or login?

There are several Cisco devices on my network which I can find with ping or nmap but I have no idea what the type (e.g. switches, routers) or specific model is. Is there some way to find this out ...
4
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1answer
700 views

tcpdump on interface when pinging nonexistent hosts on local network

I've statically configured the IP address of an interface on a server: ip addr add 10.40.0.6/16 broadcast 10.40.255.255 dev eth1 If I try to ping a machine on the network (e.g., 10.40.0.1), it ...
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2answers
340 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 ...
3
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1answer
3k views

VirtualBox bridged adapter can ping but can't curl

There is a delicate server running Ubuntu Server 12.04.2. There are 4 useable IPs for this server: A, B, C, D. The server itself takes A. The server is now running two VirtualBox guests, both with ...
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1answer
168 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 ...
3
votes
1answer
3k views

Server can't ping or connect to self

This SF Answer helped me after nerve's answer below: No network loopback device after security update ubuntu 12.04 Original Question I've been Google-ing and banging my head against the wall for a ...
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0answers
75 views

I have a very strange symptom in my network

I have a very strange symptom in my network, some times a ping to the remote computer doesn't work in the same subnet (same VLAN), for example: [Local Computer (IP:10.10.10.2/16)] --- ping ---> ...
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1answer
205 views

I can ping www server, but cannot ping domain name [closed]

for example, I can ping www.example.com, but cannot ping example.com. It reports: "Ping request could not find host example.com. please check the name and try again" (in DOS mode) How can I fix ...
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1answer
137 views

Ping measurements during throughput measurements

I have been measuring the throughput of file transfers from remote hosts and analysing the results, I understand about payload to overhead ratios, retransmission and other causational factors of ...
0
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1answer
1k views

ping -a does not return hostname [closed]

The problem i am currently experiencing is with One of my Untangle boxes. We are using IPsec VPN, Microsoft Server 2003 for DNS. I cannot get RDP to work with hostname, FQDN, ONLY IP. When i use ping ...
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2answers
287 views

I can't ping my server from certain IP

I have 2 internet connections from 2 different ISPs with static IPs, lets call them A and B. A connects to the server in several ways (ping, SSH, HTTP), while B cannot do anything (ping, SSH, HTTP). ...
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1answer
1k views

Reply times vary with ping test

I am seeing the following and I have already scanned all the computers for viruses and there were some but they have been removed. Would anyone have any other ideas on what tools or other things that ...
0
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0answers
122 views

Can't see all servers through VPN

I set up routing and remote access on a customer's 2003 server. Everything works, I can connect no problem. There are two servers in the domain. One is a 2003 Small Business DomainServer, the other is ...
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2answers
7k views

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
154 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 ...
0
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1answer
68 views

Unable to reach Terminal Apps and Ping to VM server 2008

We have Domain Controller Group Policy Set to Disable Firewall on All computers within Domain, because we have Syamntec end point Protection enabled. The problem now is, since Windows Firewall is ...
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4answers
1k views

NSLOOKUP and NBLOOKUP give one IP address; PING finds another

In a Windows Server 2008 domain the on-site domain controller serves as both DNS and WINS server. It is also a DHCP server. One workstation is used as a platform for all admin of the various servers ...
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1answer
339 views

Pinging two machines (mac and a pc) from a wifi hotspot [closed]

I am in India and I use a device like this(Verizon mifi) to connect to internet(Indian version is called Tata photon WiFi hub), this device can connect upto 5 computers but the problem is that none of ...
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0answers
563 views

Cannot ping any machine on local network (embedded linux device)

I have an embedded linux installation (custom built using buildroot, uClibc and busybox) and I am unable to ping any machine on my local network. My /etc/network/interfaces file is as follows auto lo ...
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1answer
5k 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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1answer
259 views

I am unable to ping two machines each other despite they are on same domain network

I am having two VM's equipped with 180 trial versions of Windows server 2008 R2 SP1. In one i have configured active directory domain services and ran dcpromo.exe on it and added the other server to ...
1
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1answer
214 views

Unable to connect to device across subnet

I have a network printer (Sharp copier) that I am unable to contact from a different subnet . I am on 192.168.100.x. The printer is on 192.168.200.x. I can ping (or remotely connect to) every other ...
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0answers
58 views

ping -4 and ping -6 both connect, but ping doesn't

On a Windows 2008 R2 server I'm having a strange issue with dns. nslookup, ping -4, ping -6, tracert -4 and tracert -6 all work correctly and will resolve the correct IPs. But ping and tracert ...
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1answer
408 views

Pinging between hosts through Layer2 tunnel fails

I have some serious problems with my newly setup network with a Layer 2 VPN tunnel. I draw a little diagram to show the simple version of the setup: The green lines are through the VPN, the blue ...
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3answers
2k views

Cannot ping from a bridged inteface

I am trying to bridge between eth2 and br0 from Ubuntu 11.04 within virtual box. There is network bridging to host physical machine. From the guest OS after bridging I can ping from br0 but ...
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1answer
801 views

How to find out why website is not accessible? [closed]

I cannot access a certain website. There are two possible reasons: The block is on the ISP side. The block is at the website. Is there a technical way to figure out which of these are causing the ...
0
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2answers
128 views

Why I can ping “anything” and I get a response, instead of getting “Unknown Host” [closed]

I can ping any word or domain in CentOS 6 and I get response from the same IP, if that pinged domain doesn't exist in real world. e.g. ping xxxxxx How can I fix this? I want to have normal behavior ...
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2answers
1k 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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votes
3answers
426 views

Ping hostname returns another hostname in output : what does it mean?

When I ping the server sip3.voip-centrex.net, I get this output: PING sip3.voip-centrex.net (194.98.81.144) 56(84) bytes of data. 64 bytes from mpfrrelay.michaelpage.fr (194.98.81.144): icmp_req=1 ...
0
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1answer
361 views

ping debian vpn server from windows clients

Scenario: I have a functioning openVPN connection on my Debian Server (it's a virtual server, so there are some restrictions what I may access/modify) and Windows 7/8 and OS X Lion/Mountain Lion ...
4
votes
2answers
6k views

openvpn: connection established, can't ping server tun interface (debian server, windows & os x clients)

My goal: I want to set up openVPN on a vServer from the company netcup, running Debian squeeze. I only want a VPN connection from client to server; clients should not be able to see each other, also ...
4
votes
7answers
3k views

Scan for connected, powered on computers on a network?

I want to scan for powered on computers on my LAN and gather logs about that. I tried nmap but it didn't work very well (a lot of switched on computers are not getting detected). nmap -sP ...
0
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1answer
347 views

ubuntu set up as router lan pc can ping one direction and get shares but other direction can not ping or connect shares

I have ubuntu router questions. you can see tracert can complete on way but not other way. How to make that work? (a better visual layout exists here) ...
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1answer
325 views

2 nic cards in ubuntu PC, one to router, one to win7 pc, make connected pc on router talk to win7 on 2nd nic

There are 2 win7 pc, 2 100 mb/s routers and 1 ubuntu 12.04 pc. I scanned a diagram of the Lan setup with IP's ...
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votes
2answers
3k views

Cannot ping over LAN until a ping is received

I have two OSX machines on a local subnet. Pings from Machine A to Machine B consistently timeout until Machine B pings Machine A. After B pings A, A can successfully ping B, but this success is ...
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votes
1answer
307 views

Have access to internet but ping 4.2.2.4 results in 100% packet loss [closed]

I am running openSUSE 12.2 on my machine. When I try ping 4.2.2.4 in my konsole I get 100% packet loss, but I have access to internet. How can I fix this? I always thought if ping 4.2.2.4 doesn't ...
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1answer
3k views

Cannot ping Windows 2008 R2 by hostname

I cannot ping the Windows 2008 R2 server by hostname from Windows XP Home machines, but I can ping it from Windows 7 Ultimate machines. I already disabled ipv6. I need to access a shared folder: ...
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1answer
2k views

2 router network setup. Why does ping only work in one direction?

So the setup looks like this: There is a main WLAN-router/modem which is connected to the internet and serves the lower floor with WLAN. Now upstairs I have a second WLAN-router/modem (I will call it ...
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1answer
577 views

does ping command to a dns name uses DNS PTR type messages?

Okay I cant understand this, when I try to ping to a machine on my network using the name associated I get a response from that machine, thats normal.. But there are messages that the sender sends to ...
0
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1answer
424 views

iptables blocking ability to ping/reach domain names

I'm trying to set up some firewall rules for allowing SSH, incoming ping, munin, and MySQL between one server and another (all those services are working fine with my rules), but when I apply the ...
0
votes
1answer
130 views

Linux server cannot be pinged

I have set up a Linux server in DMZ. There is another Windows server running in same DMZ. These two servers can be pinged via internet using my home PC. However, the another Linux server rented from a ...
3
votes
2answers
227 views

NTP syncs with local timeserver but not NTP pool servers

I setup an NTP server on a machine in another subnet and tried to ync my machine with the server and it works well. But when I try to ust the pool.ntp.org servers (I tried 0.pool.ntp.org, ...