Questions tagged [ping]
Ping is a mechanism to see if a remote host is reachable via an IP network
969 questions
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Server appearing offline to browser, even though it is online
I have launched 8 or 9 webservers, personally, and something is very unusual this time regarding http/https transfer with apache2. Ports 80 and 443 are up, as indicated by nmap on a remote client ...
ndtech
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HTTPS ok but ssh and ping fail on oracle cloud ubuntu instance
A short while ago, I had to reboot my Oracle cloud Ubuntu instance after I sent it a too large workload. After that, HTTP worked normally, but SSH and Ping both failed.
Here is what happen when I try ...
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Virtual interfaces on OpenvSwitch with STP do not work correctly
Network Scheme
Networks in my scheme:
CLI - 192.168.1.0/26
SRV - 192.168.1.64/28
MNGT - 192.168.1.80/29
I have a problem. I set up STP between sw-1 sw-2 sw-3 (sw-1 is the root switch), after which the ...
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Interface UP but no ping
I have a handful of machines connected to a switch. Most of them can ping the server that's connected to the same switch but a couple can not.
The network interface of the machine in question is up/up ...
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Ping works, but creating new SSH connections fail intermittently
Environment
server OS: Linux 5.15.0-46-generic #49~20.04.1-Ubuntu SMP Thu Aug 4 19:15:44 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
server SSH: OpenSSH_8.2p1 Ubuntu-4ubuntu0.8
OpenSSL 1.1.1f 31 Mar ...
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130
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Mininet can't ping from switch (s1) to host (h1-h4)
I'm creating a simple mininet with a simple command like below. I'm using the OpendayLight SDN controller along with 192.168.20.0/24 subnet. Remote controller IP is hosted at 192.168.8.5. It connects ...
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How do sites like "www.isitdownrightnow.com" determine that a website is operational?
How do "status checker" websites like "isitdownrightnow.com", "Hosting Checker" or "isitup.com" determine that a website is operational? It's got to be more ...
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No route to loopback IP through IPsec subnets
No route to loopback IP through IPsec subnetsFirst of all, please note that I do not have access to the remote equipment, i.e., the remote IPsec connection point. The communication has been ...
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WSL2 outbound connection failure to other local machine
In Windows 11 23 H2, I connect using PowerShell from WSL2 to remote servers and ping google.com responds.
I have another local Ubuntu machine available over the network. I can connect to it from ...
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Ansible AWX issue - Ping module fails in my custom Execution Environment pod when running Jobs, but not when I start the Pod manually
I built a Docker image from CentOS 9 Stream via Ansible-Builder. When I spin up the Docker container I can ping VMs in my network. Also when I run a Playbook to manually create a K8s Pod from the ...
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Linux: Cannot ping interface while other interface is active
So I have a RHEL server which I plan to use for facility monitoring. It has 2 network interfaces on different subnets. For the sake of brevity these would be the result of an 'ifconfig' and I'll call ...
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How do I get packets to egress to the tap0 interface rather than the lo interface?
I ran ping 10.0.0.1 and ping -I tap0 10.0.0.1 to see if my custom tcp/ip stack would receive them.
Instead of sending the packets through the tap0 interface, they are sent through the loopback. I ...
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Ping from dummy interface
I want to test NAT table using dummy interface. I have enp1s0 interface connected to internet and have configured NAT table to MASQUERADE packets as shown below.
random@debian:~$ ip addr
1: lo: &...
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Ping shown 0 received, 100% packet loss. But the captured packets shown the reply packets is ok
I pinged a host, shown 0 received, 100% packet loss.
The captured packets show a reply, however the message "admin prohibited filter" is displayed.
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linux ip route (interface) selection based on ping to destination?
Intro
I live in Thailand. Our connectivity to Europe here is somewhat strange.
Sometimes connections go directly to Europe (ping of 180-250ms), because my ISP has a direct 100G link to a peering ...
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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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ICMP request | By Virtual NIC | no response
The Issue:
I want to Understand what's going on when I'm sniffing from the host machine with Wireshark for instance packets that are coming from the VM that is bridged directly to the physical network....
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36
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Server is slow to reply to ping via WiFi interface, but not when sending traffic
The server is Fedora on amd64. It has an eth interface and an wifi one, 5GHz.
From a machine in the same LAN, when I ping the server I see:
Ping 192.168.2.20 (eth) gives <1 ms
Ping 192.168.2.21 (...
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Ping arclk.net returns ping response from ip 127.0.0.3 [closed]
Ping arclk.net returns ping response from ip 127.0.0.3 in each of my 4 PCs and my android mobile as well. Is it normal? Or it's infected by a virus? If so, how can I disinfect all of my devices? CMD ...
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Ping resolves hostname but takes 10 seconds before it starts sending packets
I have two Linux machines connected to a router, so they are on the same subnet. Machine A tries to ping machine B by its local IP, everything works fine. But when A tries to ping B via a DDNS enabled ...
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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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Hostname and DNS for embedded devices in LAN
I'm not able to find an explanation or even related questions since I don't know exactly what is the problem and the correct keywords to use.
I'm a firmware guy and often I develop code that enables a ...
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350
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Ping: "Destination Host Unreachable" even though ARP request succeeds
I have a wired interface with a static IP configured. Pinging the gateway results in "Destination Host Unreachable".
PING 10.3.3.246 (10.3.3.246) 56(84) bytes of data.
From 10.3.3.8 icmp_seq=...
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215
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Linux Server offline briefly every 30 minutes and 10 seconds
I have a very odd situation with a Linux Server (Fedora 38) that goes offline exactly every 30 minutes and 10 seconds. Nothing can ping it and it can't ping anything for a second or two, then it's ...
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Unable to connect to remote using ipv6: ping6: UDP connect: No route to host
thought I'd try asking here since I don't know where else to turn to.
Simply, I am trying to ping/SSH my remote server from my local machine using ipv6 but it keeps failing. Executing ping6 for my ...
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Why can't I ping local IPv6 address?
OS: almalinux9
2610:150:c002::1:a563 is the IPv6 address of my local network card eno2.
[root@alpha ~]# ip addr show eno2
3: eno2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state ...
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Ping and mDNS over WireGuard not working
When running through WireGuard VPN tunnel from outside the network, I can access machines inside directly via IP. For example, hitting IP of PiHole box in a browser returns the PiHole UI. I can also ...
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124
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"Destination Port Unreachable" only on secondary IP of VM
An vmware VM is assigned two IPs. We can only ping one of the two IPs from VMs on the same network.
2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen ...
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504
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Find LAN's IPv6 multicast address (or else all currently responsive LAN members)
Is there a way to see which devices (IP numbers) are active on the LAN over IPv6? With IPv4 I'd ping the broadcast address, which is usually not hard to determine.
With IPv6 I understand there are no ...
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How can I determine which network adapter a device is using for packet emission when attempting to reach a specific IP address using ping?
I have been trying to reach a particular IP and I have not been able to check on which Network Adapter it is using for publishing. Is there any way to check on a particular device to verify whether it ...
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Lowering latency to distant endpoint
I need the lowest possible latency from Bulgaria to Korea.
From what I understand, as an individual there is not much I can do to choose which physical cable my internet traffic travels on across ...
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Why is ping from New Jersey faster than from Tokyo to binance (in Tokyo)?
I am thinking of using vultr as VPS. When I do a ping to binance api.binance.com which have their servers in Japan on the site https://hnd-jp-ping.vultr.com I get much worse ping from Japan than if I ...
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Why is Linux policy-based routing (PBR) not working for ping?
First of all, it seems as if this question is about Linux, but it seems to me that it is about basic routing concepts.
I happen to have the following configuration:
What I am trying to do is to ...
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138
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Network Skip Pinging Every 3 minutes periodically for 2 sec
I have an application runs in UP Board | UP-CHT01, which will do an operation and send the data to NATS Messaging Server. ( Which is running on another PC i.e, not in the same board)
While testing the ...
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193
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Low cost TCP listener for Azure
We've been going through the process of migrating VMs from our data centres into Azure.
When migrating, one of the gotchas is networking rules; i.e. there are NSGs, hardware firewalls, OS firewalls, ...
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Ping performance improves during iPerf3 network congestion test
I am beginning to learn about networking and testing network performance (specifically on containers). I am trying to learn how to perform good network tests to see networking capabilities of docker ...
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4k
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ping 100% packet loss - can't ping to server
when I try to ping my newly created server it shows:
vasanth@vasanth-client:~$ ping -c 4 server.ip.name
PING server.ip.name (server.ip.address ) 56(84) bytes of data.
--- server.ip.name ping ...
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Does frequent ping affect local network speed?
(Sorry for my english)
Hi, I am about to set up a monitoring server and wanted to know if pinging the network devices could significantly affect the speed of the local network.
I want to ping every ...
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420
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debian wheezy has packet loss on ping
There is an old debian wheezy server in my office. Any network operations involving this server are very slow, whether ssh, scp, or using its Apache web server.
Pinging from inside this wheezy server ...
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115
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Setup new router with SQM - Buffer Bloating solution
Scenario. I'm in Tbilisi, Georgia.
I have very high ping to EU servers(100ms+) plus a huge buffer bloating problem, this test gave me the F rank: https://www.waveform.com/tools/bufferbloat
I use an ...
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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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1k
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Why do I see more than one IP address for my site when I PING it from CMD? [closed]
I have a website (cimahouse.co).
Every time I wanted to reach my site, I got a different IP address.
Sometimes domain cimahouse.co opens normally, and sometimes it should write it with www.
I tried to ...
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509
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PC/Switch (in one subnet) connect to Switch (in another subnet), but not to PC connected to the switch
[UPDATE]
The problem/behavior described below was caused by the public network connection on the system -which had a default gateway. The unusual behavior was a result of the private network sending ...
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List all active devices in different subnets?
My company has a class A network that contains various subnets. I need to automate a way to produce a list of all online devices (in all the subnets). To start, just a list of responsive private IPs ...
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How can I make my nginx web server reachable from outside its local network?
I am trying to reach a subdomain of my website from outside its local network.
I can successfully ping it (ping my.subdomain.com):
PING my.subdomain.com (ser.ver.ip.add) 56(84) bytes of data.
64 bytes ...
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Ping device connected to host having LAN access
I've been playing back and forth routing games for a couple of days.
As it is quite hard to describe with words I made a diagram below:
What I want to achieve is being able to ping Rpi 4B from Rpi 3B ...
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477
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pinging over interface fails, pinging over ip address of interface succeeds
I often use the ping -I option to test if an interface forwards packets correctly.
A Raspberry Pi 3 has an interface named eth1. It is a USB to female ethernet connector.
I manually configured this ...
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61
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I can't PING to my Cisco router when I try to access the domain server
I have this network image
I tried to connect the pc1 to the domain (in Windows Server 2012).
To do that I tried to PING from pc1 to the server and that works.
After that I go the pc1(Windows 7) and I ...
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352
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How is it possible that I'm getting a 13ms ping RTT from London to a New York IP?
I have created a Digital Ocean - App Platform app in the New York region.
When I ping my domain, I get this IP address: 172.67.143.96 and this RTT 13.501ms
If this IP address is actually in New York ...
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Cant ping between 2 machines in same subnet
I have machine A ubuntu with IP address 192.168.1.70 and machine B windows 10 with ip address 192.168.1.45. When i try to connect them using a lan cable i can ping between 2 machines successfully .....
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