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Questions tagged [ping]

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

Ping is used to send an ICMP packet to a remote host. The ICMP type sent is an echo request, and the type the remote host will send back is an echo reply. Some firewalls or hosts may block ICMP, so ping should not be the only tool used for troubleshooting.

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How can I use ping with a large packet size to troubleshoot network issues?

What types of network problems can be identified with ping of a large packet size?
makerofthings7
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Unable to ping, although can download packages

I've installed Debian Squeeze on a Dell PowerEdge server. However, I'm facing some problem with configuring the network. Although I can ping machines inside my network, I'm unable to d0 so outside the network (google.com). The strangest thing is, I…
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Intermittent high ping/latency problem

I have been working with my ISP (which is a WISP, actually Fixed Broadband Wireless) trying to figure out why I intermittently get high latency. The latency is detectable in online games and other streaming applications. If I do a trace route you…
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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 looks like both the host and the guest are using the…
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How network devices affect TTL

When I do a ping, I can see the TTL value for each packet. For every router that I insert in between my computer and the router that connects to the internet, the TTL value goes down by one. However, inserting a switch or a hub does not have any…
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Ethernet Loopback plug - running a ping

For a project at work, I need to be able to test various Ethernet NICs by connecting them to a "loopback adapter plug", like this one on various embedded Linux boxen that come off a production assembly line. I'd like to be able to setup two…
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ping is very slow to start if hostname is provided even though DNS resolution happens quickly

I have a network of CentOS servers. On some hosts, if I ping a machine by its hostname then it immediate prints the first line of output which shows that it has resolved the hostname to an IP address but it sits there for something like 30 seconds…
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Traceroute time is too long

I m using RHEL 6.5 and eth0 interaface Interface Ip is 100.x.x.x and when i traceroute to 100.x.x.x it showing one hop that too ip address of interface itself. For eg traceroute to 100.65.111.14 from 100.66.28.75 gives 100.66.28.75 3000ms 3214ms…
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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 uses one of the designated "private" IP address subnets…
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How can I tell when a Mac switches access points?

I want to be able to tell when a MacBook (running OS 10.5) switches from one wireless access point to another. In the building I am in, with several wireless access points (all Airport Extremes, all with the same SSID), the computer shows that it is…
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OpenVPN Access Server: Remote Subnet Cannot Access Client's Resources

I have OpenVPN Access Server running on AWS. Here's the configuration: 172.18.16.0/20 Client (172.18.16.101) ----- OpenVPN Server (172.16.0.0/20) | | …
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What does ipg/ewma mean in an output of ping -f?

I pinged in a flood mode: # ping -c 1000000 -f 127.0.0.1 and I got the following output: PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data. --- 127.0.0.1 ping statistics --- 1000000 packets transmitted, 1000000 received, 0% packet loss, time…
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DNS and PING failure - Windows 2003 DNS and SonicWall NSA240

I am hoping someone can shed some light on this one... I have two Windows 2003 DC's - both running DNS, there are several Windows 2008 R2 and one Windows 2012 Standard server running as member servers - they are all on the same subnet. Until today,…
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Need to understand : ping

I am using ubuntu 13.10 and I have used ping before to check server is up/down. Can someone help me understand, as I'm unable to find anything explaining this I did the usual ping command ping 8.8.8.8 output without google domain 64 bytes from…
ganesh
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blocked.domain.gstatic.com - Where could this blocking be?

As of this morning we were having serious issues (partially loaded site with no functionality) accessing Google Drive which we use heavily. Other websites seemed to work fine. This is happening on ALL networked machines which are Windows 7 Pro…
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