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

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1answer
31 views

Default gateway and ARP confusion

I have the following configuration (I'd post a pic but not enough rep for more than 2): PC1 (10.0.2.10/24) and PC2 (10.0.2.137/29) are connected to a hub, which is connected to a router on interface ...
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0answers
26 views

PLC actively refusing connection

I have a problem building a TCP connection between a PC a PLC. In short words: The PLC is waiting for connection attempts of the PC. The PLC has a static IP and two Ports (3011 and 3021) I can ...
2
votes
1answer
70 views

Pinging Hostname results in reply from 2 different IP addresses

I have an odd behaviour on my Windows 2008 R2 server, when I ping a hostname of another system, my first reply has a different IP address then the following replies. For example, if I was to ping ...
4
votes
1answer
2k views

Ping not working from tap interface attached to bridge interface with ip on same subnet as that of bridge to outside

My requirement is to create a multiple tap interfaces, each with ip address on same subnet. I tried this by creating a bridge br0 (192.168.1.199) ...
0
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1answer
42 views

First ping (to any destination) fails from switch but not from router

I've got a basic network setup, just doing NAT to a single public address to an internal /24 without any VLAN's or fancy routing. Both my router and switch are running Cisco IOS 12.x. My ...
14
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10answers
46k views

How can I set a short timeout with the ping command?

I am trying to write a script that lists all the hosts on my LAN (there a about 20 of them) and writes the ping status next to each host. I have the DHCP leases file, so I have all the IPs (say, ...
2
votes
2answers
267 views

Cannot ping remote server; how can I debug local networking misconfiguration vs my IP is blocked?

I manage a KVM VPS at 104.143.14.103 that for some reason cannot reach http://pecl.php.net. When I ping the IP address of the PECL server (104.236.228.160), to make sure that it isn't a DNS problem, ...
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0answers
30 views

Is it normal to have unstable ping on local AP

I am about 1 or 2 level better than newbie in networking so i hope i didn't say anything wrong, except for my english. I have AP, TP-LINK TD-W8951ND that connected with ADSL. MY PC1 connected by ...
0
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0answers
4 views

Vmware guests high ping times [migrated]

My host server is Debian 7 running Vmware Workstation 12 PRO. I experience high ping times sometimes to guests: 64 bytes from 10.0.0.50: icmp_req=2198 ttl=64 time=0.255 ms 64 bytes from 10.0.0.50: ...
1
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4answers
3k views

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 ...
0
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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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3answers
64 views

Server monitoring reports ping failed

i run a dedicated server and my hosting provider sent me an email reporting this and in 20 mins the service is recovering. i am running centos with softlayer Service Issue: SERVICE PING failed for ...
2
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0answers
31 views

Ubuntu server 15 during ping (DUP!) what does it mean

For some time during ping 192.168.0.2 I have something like this (DUP!) something is wrong with my network card or switch? Image Ubuntu server 15 - *192.168.0.222* Windows server 2012 - ...
1
vote
1answer
13 views

How to find the initial values of TTL for your current operating system?

In this answer to a question related to interpreting the values of TTL from a ping operation it is said that the TTL values vary depending on the operating system. I understood more or less the ...
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votes
1answer
39 views

Get request IP from dns lookup

I have been looking to find the IP from a machine that asks my DNS server for a CNAME resolution. For example: User A pings to DNS server 1 on test.myserver.com, this server has a CNAME resolution ...
285
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18answers
685k views

Ping a Specific Port

Just a quick sanity check here. Can you ping a specific port of a machine, and if so, can you provide an example? I'm looking for something like ping ip address portNum.
2
votes
3answers
11k views

Ping returns different results if asked ip address or hostname

Alright, I've got an irritating problem. When I ping one of the servers in my company with ping 192.168.1.62 I get my box ldmmit1 as the result. But when I use this line ping ldmmit1 I ...
0
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2answers
939 views

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 ...
16
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10answers
80k views

Is there any way to ARP ping on Windows?

On Linux and other systems, there is an utility called arping which can be used to send ARP requests ("pings") and show the answers, much like the "ping" utility but using ARP instead of ICMP. Is ...
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1answer
23 views

resolve a previously failing url without editing resolv.conf

I want to ping a some website from my machine. But currently its failing to resolve ubuntu % nslookup somewebsite.in ...
3
votes
1answer
58 views

Can't Ping other local ips on l2tp vpn connection, getting: ping: sendmsg: No such device

I have setup an l2tp client using xl2tp to connect to an l2tp vpn server. The server connection requires that the connection be setup WITHOUT ipsec. So I have set up a basic xl2tp connection. The ...
0
votes
1answer
31 views

Find best AWS EC2 zone for given IP address

Is there an easy way to determine AWS EC2 region with lowest ping to given public IP address? There is a server hosted by third party. I only know the IP address of the server. Given that I'm looking ...
1
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2answers
57 views

How does Pinging from a private IP behind NAT to a public IP work

Recently I realized that ICMP does not contain any ports, so I tried to Ping from my wireless connected laptop to public IPs(of course it worked!). In a typical configuration, a local network ...
1
vote
1answer
25 views

Why cannot I query DNS with `host -a`, but yes with `host`?

I changed my DNS and I'm having this problem: > host grupoesoc.es grupoesoc.es has address 178.62.234.188 grupoesoc.es has IPv6 address 2a03:b0c0:2:d0::127:6001 grupoesoc.es mail is handled by 20 ...
4
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5answers
5k views

Ping Equivalent For Checking If A Port Is Open

How do I check if a port is consistently alive? For example, I could use ping 192.168.1.1 -t > results.txt This will ping 192.168.1.1 continuously so that I could monitor it. Is there an ...
0
votes
3answers
7k views

pptp on Ubuntu server can't ping other machines on the LAN

We have a simple pptp setup on our windows 2k3 server. So far all clients can connect just fine, mac and windows. However I tried connecting an ubuntu server using pptp and the connection is fine I ...
1
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2answers
37 views

Pinging a host from a router through the selected interface

In a typical Cisco router it's possible to ping a host from the router's OS. When the ping packet leaves router (call it R1) through the fa0/0 interface, the source IP of that packet it set to the IP ...
0
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0answers
45 views

Cannot connect to WebDAV when ICMP (ping) is disabled on a server

I have linux as a Webdav server and Windows 10 as a webdav client. I could successfully connect to the webdav server from Windows using: net use * https://mywebdavserver.com/webdav /USER:user pass ...
6
votes
3answers
6k 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 ...
1
vote
3answers
4k views

VMWare/VirtualBox: Ping don't work in Host-Only network adapter from windows host to linux guest

Scenario: Windows host running XP SP3 (Virtual) Ubuntu Server 10.04 (fresh install, only selected "LAMP Package" option during installation. Tested on VMWare Player / VirtualBox I can ping by ip ...
0
votes
1answer
48 views

OpenVPN can' reach client Lan

I have a question about OpenVPN, I had made a "dev tun" connection between my office network and a VPC on Amazon.But.... in few words: Everething work, except: i c'ant ping the client Lan from the ...
3
votes
2answers
18k views

Can't ping host from vmware guest using bridged networking

Host is Windows 7 Guest is Ubuntu 11.04 Network adapter is wireless I can ping other computers on the network but not the host. No firewall are involved. Sniffing the traffic with wireshark it ...
4
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2answers
1k views

PING icmp open socket: Operation not permitted in vserver

I am running a vserver environment with several virtual machines. A single VM has the following problem: $ ping 8.8.8.8 ping: icmp open socket: Operation not permitted $ ls -l $(which ping) ...
0
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0answers
55 views

My server doesn't respond to ping6

I'm trying to enable ipv6 on my webserver. The server runs FreeBSD 10 and I'd like to enable ipv6 access to my websites. That's the long term goal. The goal here would be at least to have a server ...
0
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0answers
25 views

CheckPoint UTM-1 Edge does not relay ping reply out of vpn

I have Palo Alto firewall and Checkpoint UTM-1 Edge with established vpn. On Checkpoint UTM-1 device Firewall is off, AntiVirus is off, Security level (low), vpn excluded from firewall. Vpn is ...
11
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3answers
12k views

Why can't I ssh into (or even ping) my Ubuntu VM from the Mac OS X host?

I'm running Ubuntu 8.04 as a virtual machine using VMware Fusion 3.0 on Mac OS X 10.5.8. I want to be able to ssh into my VM from the Mac OS X host (so I can use MacFUSE and SSHFS to mount the VM's ...
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votes
1answer
76 views

What Does “ping -f” Do In The OS X Terminal? [closed]

I've recently read about the command in the OS X terminal, "ping -f (Target IP)". I haven't been able to form an understanding on the command even after looking through numerous online articles. I ...
1
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1answer
37 views

I can access http, https on server, but can't ping the server behind sonicwall tz500

I am not sure if this is possible or not. I have set up some web servers and ftp servers that are statically NATted behind a sonicwall tz500. I can access all via ftp, http, https. I have included ...
2
votes
0answers
50 views

802.1q VLAN echo replies do not include VLAN ID

I am running a SLES11, SP4 kernel on 2 systems. I have 2 NICs connected through a Netgear GS724T switch. I have configured VLAN 400 on the switch. On system 1, I create a VLAN 400 on eth0 called ...
1
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4answers
589 views

Why am I getting different results from two servers that located in the same destination network?

There's two servers with the same network IP, and the only difference between them is the last two numbers like: 37.211.15.247 and 37.211.166.178. The Hosting Provider claims that the subnet mask for ...
0
votes
2answers
65 views

Servers can only ping to domain controllers and not to each other

I have made my own test environment and I am having problems with pinging other servers from one server. All servers can ping to domain controllers and they get responded back. When I ping from a ...
1
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0answers
2k views

Ping fail between two servers on same subnet when other devices on subnet can ping the servers just fine

I have two Dell servers running Server 2008 R2 Datacenter Service Pack 1 with Hyper-V. For some reason, these two servers cannot ping each other (nor can the VM's on each respective server ping VM's ...
1
vote
2answers
50 views

allowing ping packets from specific ip in windows firewall

How do i allow ping packets from a specific ip from my internal network in windows firewall. Whenever, i tried to set custom inbound rules in windows. There does not seem to have a way to achieve ...
2
votes
1answer
89 views

Interpreting PING Results

I am on Windows and LAN using the command line PING in this format: ping -a -n 5 -S <source ip> <destination ip> For the most part, it does what it is supposed to do but I have noticed 3 ...
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1answer
2k views

VMWare-ESXi server dropping packets, shaky connection

I have a few virtual servers running on a VMWare-ESXi server. One of those is a mailserver running Windows server 2003, Has been running quite well for a while now. About 4 days ago, the mailserver ...
0
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0answers
20 views

Why do i get different results from two servers that located in the same destination network? [duplicate]

There's two servers with the same network IP, and the only difference between them is the last two numbers like: xx.xx.15.247 and xx.xx.66.178 When i try the command Tracert (Traceroute) to test the ...
0
votes
1answer
38 views

Should I expect reception of packets in hping3 --flood?

I'm testing a newly purchased VPS for DDoS vulnerability using hping3. If I do not use --flood, everything goes fine and I see close to 0% packet loss every time. But If I do use --flood, then the ...
0
votes
1answer
15 views

Write online/offline state to log file

I'm looking for a way to log the online/offline state of a Linux host to a log file locally. I tried to use ping for this but it didn't log timeouts/dropped packages it only shows successful ...
0
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2answers
63 views

2 Lans, 1 router, need to ping eachother ip [closed]

I have 2 LANs: LAN 1 192.168.2.1/24 LAN 2 192.168.3.1/24 I have a device on tLAN 2 with IP-address 192.168.3.61. My laptop is on LAN 1 with 192.168.2.100. My final goal is to ping the device like ...
2
votes
1answer
59 views

Accessing a server with wrong IP out of segment range

I have run into a similar problem as in this question about a wrong IP in LAN. However, the standard addr alias trick on the NIC did not help. I have no direct access to the server console, I might ...