Questions tagged [ping]
Ping is a mechanism to see if a remote host is reachable via an IP network
255
questions with no upvoted or accepted answers
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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 ...
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4
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0
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Time Capsule giving high ping times for wireless
We've just set up an Apple Time Capsule for our network, and while things run fine in wired mode, with wireless mode ping time fluctuates wildly from 0.5 to 400ms:
Ping from a Macbook Pro to 10.0.111....
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Cannot ping anything from tun interface
I'm setting up a VPN server using OpenVPN server 2.4. The client connects to the server, but I can not seem to be able to ping any other host except the server or other clients on the VPN subnet. The ...
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Different nslookup answers on different clients in local network with local DNS
Situation:
I have a few clients in a local network.
I have a server named amp003 with IP address 192.168.4.13
I have two DNS servers (each one on relative DC server).
On client 1 I did following:
...
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3
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1
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Ubuntu 16.04 server is listening but not accepting incoming requests
I recently upgraded my server from Ubuntu 14.04 to 16.04. The upgrade seemed successful (so I'm not sure if it's related) but about a week in I restarted the host and it now will not accept remote ...
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3
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0
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OpenVPN - ping duplicates packets
There is an issue that I cannot find answer for. I have typical setup OpenVPN - 1 server with 10.8.0.0/24 subnet and a 1 client with 10.8.0.5 address. Whether the connection from the server to the ...
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3
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Ping problems with two interfaces, same subnet, direct connections to two separate hosts
I have a configuration of a client machine (Ubuntu 14.04.2 LTS) that directly connects to two server machines. The server machines--while on the same subnet--cannot route to each other. Packets must ...
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2
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Cannot ping through one of the network interfaces
Setup
ubuntu linux VM ( virtual-box) is configured with two interfaces, eth0 and eth1.
eth0 is on a bridged network and directly connected to external network.
eth1 is on "nat network", which is ...
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2
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0
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Virtual machine network issue with host and ping service checks (within Nagios Core and from command line)
I have got a Ubuntu server guest virtual machine (installed via virt-install) which runs Nagios Core monitoring but there is a major issue with the monitoring (i.e. ping packet loss / RTA or ...
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2
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0
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Hyper-V inconsistent/high latency between two VMs on the same vSwitch
This is a clean installation of Windows 10 1903 with Hyper-V, though I've experienced this in previous versions of Windows 10.
Add a private vSwitch (so, not tied to any physical network adapter). ...
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2
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Why does my router go down every ~16 hours and how can I debug it further?
I have a router that is connected to a larger managed network (such as a university campus network). The router is configured with a static WAN IP address and provides NAT and DHCP to the LAN.
After ...
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Not able to ping VM and/or mount NFS after changing IP via POSTROUTING
Imagine the following setup.
I have a machine A which exports a network share and is reachable under, say 1.1.1.1.
A second B machine with an IP, say 2.2.2.2, is mounting that share, everything's ...
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2
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2
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How to identify PID of process that is generating lots of ICMP ping requests?
I have a box that is generating lots of outgoing ICMP requests. I am able to see a few happening every second with tcpdump -nni ens192 icmp. However, I don't have anyway of tracing these back to the ...
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Why would I get ping replies from a private IP outside of my subnet?
I have a computer with 2 network adapters, each on its own subnet. One is our private LAN, 192.168.1.0/24, the other is for the internet. The internet subnet is 10.251.85.161/27.
When I ping-...
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Can't ping remote host through nat on ipsec enc0 (mtu=0)
I'm up ipsec vpn to remote host. Since the remote host accepts only one ip i'm up nat for local net on enc0.
Ping from ipsec host is ok:
PING 172.20.162.150 (172.20.162.150): 56 data bytes
64 bytes ...
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0
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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 - *192.168.0.2*...
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1
answer
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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 ...
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2
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0
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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 ...
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2
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Difference between ping time and time for first ACK answer
While creating a packet performance monitor I come across the follow problem: if I ping a server, I get about 4ms. If I calculate the time between a POST and its first ACK, I get about 25us (...
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0
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Apache Instance in Private Subnet not returning packets
How can we get the Apache instance in a private subnet to work?
Configuration
Public subnet with 1 NAT instance
Private subnet with 1 App instance
Details
1. Masquerading is turned on NAT on via ...
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2
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1
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Server's network capabilities are going into some sort of sleep mode?
I'm having trouble with a server (Windows Server 2008 R2) on my network.
It is going down for short periods at a time, but not very often.
The interesting thing:
If I ping the server from my ...
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2
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1
answer
688
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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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2
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1
answer
744
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can't ping/ssh new libvirt instance
I have a working virtual host that was Ubuntu-Server Lucid (10.4). I've been using it for a while and has several functional guests created on Lucid.
Today I upgraded to Maverick, then to Natty (11....
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1
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0
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26
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check_ping in nagios resolves to ipv6 instead of ipv4
mn1.testchn1s1.ind ~# /usr/lib64/nagios/plugins/check_ping -H mn1.testchn1s1.pub -w "700,60%" -c "1400,100%" -p 5 -4 -s
PING OK - Packet loss = 0%, RTA = 0.10 ms - mn1.testchn1s1....
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1
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0
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39
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Embedded Board Replies to Pings in Wireshark but not in Windows
I have an embedded board (running a Cortex-M7), and LWIP for the networking library. MAC is integrated to the CPU, but has an external PHY.
I go ahead and initialize LWIP, and when I ping the board ...
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1
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0
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Host ID's on Network not in succession of 'active' or established devices?
Disclaimer: I am new to networking.
I ran a arp -a command on Terminal to establish what devices are currently active on the network. I was returned a number of devices with Host ID's that were not in ...
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1
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0
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FreeNAS unable to resolve hostnames, ping of any external IP returns host's ip instead
The internal IP address of my router changed, and ever since TrueNAS has been misbehaving. None of the jails can resolve a hostname anymore. In troubleshooting this, I discovered that the client ...
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1
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1
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39
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VLAN Inner Talking
I kinda forgot about CISCO in general, it had been quite a while since I last touched packet tracer. Now I'm on the PRE-deployment phase of a network at work. Long story short.
-I made 2 VLAN on CISCO ...
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1
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0
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901
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Spanning tree causing packet loss between a Cisco switch C3560 and Linux server running on CentOs
I am working in a network environnement where I have some Cisco Switch WS-C3560X-48 and Linux Servers running CentOS 7.7.
The linux servers are connected 3 times on my switches : one admin link, one ...
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1
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0
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Ping Request to Virtual Machines Sometimes Drop Sometimes Not
We have installed on a server PC Hyper-V Server 2019 then install three VMs which are Ubuntu Server 20.04. There are two physical ethernet port on the server PC. We configured one of them as a private ...
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0
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210
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Openstack Kolla VM not ssh or ping
I successfully installed OpenStack kolla Victoria release. After that i executed init-runonce and VM(cirros) is spinned up and running. I assigned floating IPs as per run-init. Everything is ...
1
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0
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ODOO 10 Page wasn't loaded completely
Since a few days I can't access my ODOO instance from the external network. The home page doesn't load completely if I use a public IP address, only the logo loads. I searched in google and I found ...
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1
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1
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Why do I get an error when pinging a windows computer by HOSTNAME from Linux Unbutu 20.04?
I have a Hyper-V Linx Ubuntu 20.04 VM
I'm trying to ping a windows box in my domain via it's HOSTHAME.
I've followed some threads with this suggested fix:
sudo apt-get install libnss-winbind
I then ...
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1
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0
answers
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Kubernetes 1.18.6 : inter pod communication on google cloud custom vm nodes not working
[Problem statement]
Ping from pod {busybox-minion1} running on worker1 {named as : minion1} to the pod {busybox-minion2} on worker2 {named as : minion2} is not working.
It is a three-node cluster ...
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1
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1
answer
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Can't ping host with two interfaces
I am trying to figure out why a network interface is not pingable and is returning an ICMP type 3 code 1 response: Destination unreachable (host unreachable).
I am trying to ping from host1 to one of ...
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1
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1
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Can't ping one system through VPN, but I can ping the rest of the network
Working from home I connect through a VPN to the VPN server of the office configured on top of ClearOS.
From home I can ping all the office except one system. A Compact Rio from National Instruments.
...
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1
vote
1
answer
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Cannot PING between two network interfaces
I am playing around AWS EC2 instance and I came across a strange problem.
I created an EC2 instance (Instance A) with 2 network interfaces, and the following is the routing table:
default via 172.31....
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1
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0
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Proxmox VM can't ping outside but host
I'm trying to configurate my proxmox but something is faulty and I cannot see what really it is.
I hit almost every google search result and almost every post on the forum and still can't see what ...
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1
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2
answers
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Cannot connect to AD DC over VPN
I have a Windows 2016 server acting as a AD DC. I have Fortigate 50E firewall. I'm setting up a VPN connection for remote users on the Fortigate.
VPN connects fine. I'm able to ping every other host ...
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1
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0
answers
75
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Fail to ping/ssh from single machine to another specific machine
I'm using Google Cloud, there are 2 machines on the cloud which can't ping each other, A can't ping B, and B can't ping A too; all other machines can ping to A&B as usual. But it happens only on ...
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0
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NPing gives significantly less time on `TCP Connect` than `TCP`
I'm using NPing (NMap's pinging tool) to measure latency on specific servers that may not respond to ICMP. Also, servers do not usually run HTTP(S) and I only check latency on a specific TCP port ...
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1
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0
answers
891
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How to allow responding to broadcast pings on Mikrotik RouterOS?
By default, most systems don't respond to broadcast ping requests. However, there exist ways to explicitly allow responding to broadcast ICMP requests on multiple systems, such as Linux.
How can I ...
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0
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ipv6 route from one interface to another
I have a Linux virtual machine running in windows. The linux virtual machine has routing table
Kernel IPv6 routing table
Destination Next Hop Flag Met Ref Use If
...
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1
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0
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Intermittent Ping/DNS timeouts
Can anyone suggest anything which might cause a server to fail to resolve DNS requests at regular intervals without affecting other network traffic to that machine?
I've looked into it extensively ...
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2
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Ping packet loss even though the target is reachable. Does this mean packets are eventually getting through?
If I do ping 8.8.8.8 sometimes it returns the following for a period of time:
From 172.22.1.1 icmp_seq=36 Destination Host Unreachable
But at other times it does reach the target and yet it says ...
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1
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0
answers
111
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Multiple routes from router advertisements
Consider the following simplified setup:
All devices are IPv6 enabled.
Interfaces are configured in a way that we have 3 networks as shown.
Router advertisments are enabled on both routers R1 & ...
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1
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0
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87
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Ping devices on local network via PC on Azure VPN
I'm trying to ping a device on a PC's NIC (Ethernet) with a static IP of say 192.168.1.1 (This IP is fixed, it cannot be configured or changed unfortunately) that is connected to an Azure SSTP VPN.
I ...
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1
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0
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221
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Sending ARP requests with SmokePing
I have been using SmokePing to monitor my local network for some time now and I'm happy with its graphs and email alerts. I use the fping probe and it works as expected.
I found however that, every ...
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0
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IPv6 Routing: Destination unreachable: Beyond scope of source address
I need a help with IPv6 routing, I have setup a Linux box with a IPv6 interface on eth2, and this interface is bonded with interface bond0
Details as below
cat /etc/sysconfig/network-scripts/ifcfg-...
1
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0
answers
2k
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Ping latency between 2 directly connected PCs
I have a lot of experience with PCIe, some with USB, and little with Ethernet, so the following has got me confused:
I'm evaluating the performance of a USB-to-Ethernet controller, vs a PCIE-to-...
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