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

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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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0answers
720 views

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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2answers
673 views

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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4answers
2k views

Disabling 'ping' response on Linux VPS

I have a openvz linux vps and am trying to disable requests to 'ping' to my VPS. How can i do this?
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2answers
4k views

Iptables: how to drop incoming pings from host but allow ping responses?

I am practicing with iptables and... I need a rule that will block a certain host from pinging me but will let me to ping the host if needed (so I need to accept ping responses right?). Can you help ...
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2answers
1k views

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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1answer
541 views

VMware Host-Guest intermittent communication on bridged mode

I'm running 2 VMs (Unbuntu & Ubuntu Server), both of them are on bridged mode. The host is a Win7 running VMware Workstation 7. My purpose is to set up a PostgreSQL server on the Ubuntu Server VM, ...
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2answers
119 views

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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1answer
598 views

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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3answers
201 views

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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2answers
6k views

Why can't I ssh or ping my brand new Amazon EC2 instance?

I just created a free EC2 instance with all the defaults. It says it's running in the AWS Management Console. On the "Instance Actions" menu, I click "Connect". I copy the DNS name provided (looks ...
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163 views

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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1answer
593 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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0answers
253 views

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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1answer
1k 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 ...
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1answer
146 views

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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8answers
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What does “TTL expired in transit” mean on a ping attempt?

We get the message “TTL expired in transit” when we try to ping to a server in a different network segment. When we run tracert, 4 ip addresses repeat themselves indefinitely: 14 60 ms 59 ms ...
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164 views

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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1answer
74 views

Router Behavior for MAC Address Change for same IP

+-----------+ +------------+ +---------+ | LAN |eth0 lan0| Router |wan eth0| | | PC |===========| |===========| WAN-PC | | | ...
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1answer
274 views

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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266 views

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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1answer
154 views

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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1answer
533 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 ...
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1answer
4k views

Can ping but cannot traceroute from Linux. Can do both from Windows. What gives?

So here's the issue. I have two different computers behind the same network. Both have the same gateway, IP address prefixes, etc. Computer 1: Windows XP IP 192.168.0.15 This computer can ping and ...
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3answers
3k views

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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1answer
189 views

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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1answer
91 views

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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2answers
2k 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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1answer
355 views

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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1answer
666 views

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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3answers
410 views

Why is DownOrNot and JustPing reporting that my website is down?

I was pinging my site with DownOrNot and it is reporting that my website is down from ALL locations: http://www.downornot.com/qweop Then I pinged it with JustPing and it is reporting that my website ...
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1answer
224 views

Smokeping FTPtransfer probe

I'm trying to set up a SmokePing FTPtransfer graph but with no luck. I have the ping graphs all figured out but the FTP graph is just empty. Here is my Probes config: *** Probes *** + FPing binary ...
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3answers
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What does mdev mean in ping(8)?

What does mdev mean in ping output (last row below)? me@callisto ~ % ping -c 1 example.org PING example.org (192.0.43.10) 56(84) bytes of data. 64 bytes from 43-10.any.icann.org (192.0.43.10): ...
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1answer
548 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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4answers
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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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2answers
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Can ping IP address and nslookup hostname but cannot ping hostname

On a windows 2003 server I can nslookup www.google.com which returns Server: localhost Address: 127.0.0.1 Non-authoritative answer: Name: www.l.google.com Addresses: 74.125.79.104, ...
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1answer
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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
234 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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1answer
1k views

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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1answer
355 views

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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1answer
447 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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216 views

Win 7 Netbook refuses to ping JetDirect card (all other PCs work)

I have an odd thing occuring here. From a Windows 7 netbook, I cannot ping an HP printer on the network, while all other machines (Win7/Vista) can. And the netbook can also ping everything else on the ...
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1answer
2k views

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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1answer
1k 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
5k views

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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1answer
400 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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1answer
189 views

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: ...
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2answers
4k views

Windows Server 2008, can't ping, but networking is fine

I'm setting up a Windows Server 2008 box, and everything is working great (database, remote login, etc.), but it doesn't respond to ping. Normally I might not care, but I'm setting up Nagios ...
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1answer
232 views

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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2answers
2k views

Linux ping command exits early due to ICMP host unreachable

An automated script runs shutdown -r now on a machine, and after a 30s delay, uses ping to determine when the machine is available. I've recently switched the OS from Centos 5 to Oracle Linux 6 and ...