Questions tagged [ping]

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

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16 views

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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host unable to connect with self through its public ip

I'm on a home network with 2 machines behind a sagemcom router. One machine is a server (RPI) running ubuntu 1804 the other is a regular PC. I've only got a dynamic public ip address (say 1.2.3.4) I'...
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Laptop A is sometimes blocked from pinging laptop B. Pinging in reverse unblocks it

I have had this problem dozens of times, ususally spaced out by days or even weeks. Router R can ping laptop A, laptop B, and the internet (0% packet loss in each case). Laptop A can ping router R ...
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1answer
112 views

Debugging network issue

I've had this issue ever since I got this new router and flashed it with dd-wrt. It's not really impactful (I'll describe the scenario) but I'm curious about it... This is the diagram of the network ...
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Packet loss (for some hosts only) issue on a Ubuntu KVM guest

I have got a Ubuntu KVM guest which has a strange issue with package loss. Certain hosts on the network (e.g. 10.140.79.100 / 10.140.79.216) I can ping with no issues but other servers (10.140.79.14 / ...
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ping 8.8.8.8 -> PING: transmit failed. General failure & ping google.com -> ping request could not find host google.com

ping 8.8.8.8 results in PING: transmit failed and ping google.com results in ping request could not find host google.com. General failure. I tried: 1) Turn off Firewall 2)These commands and restart ...
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How to check if network is available from a AWX running container to a LDAP server?

I want to connect to a LDAP server from an AWX installed server. Used docker-compose installed AWX. So it's running inside container. I can ping LDAP server IP from the server running AWX container. ...
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How to generate ICMP response

I am trying to test various scenarios related to ICMP and for that, I need to generate multiple ICMP responses. For testing my flow I need ICMP response "TTL expired in transit or Fragment reassembly ...
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Internet speed test from bash/linux command line hangs

I am running this python script on a remote ubuntu server from command line for speed testing: https://github.com/sivel/speedtest-cli with: $ curl -s https://raw.githubusercontent.com/sivel/...
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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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Windows 10 (pro) IPV6 impossible to ping outside my local area network such as google dns for exemple

Windows 10 (pro) IPV6 impossible to ping outside my local area network such as google dns for exemple I can with success ping -6 all my local network equipment 2a01:xxxx:xxxx:xx00::21 (my voip ...
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1answer
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Do managed switches ping on all VLANs by default?

Amateur network admin here. I'm trying to create a link via VLAN between a VOIP PBX and an internet router. It's a large installation, so there are 4 managed switches between the two endpoints. I ...
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1answer
31 views

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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1answer
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Ping self IP address bypassing kernel

I wonder if there is a way to bypass kernel and redirect the ping packet to my network gateway when I ping my self IP address. For example, my private IP address is 172.31.42.99 and the gateway IP is ...
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Troubleshooting hosts and guests ping issue

I have 2 physical machines: host1 and host2, hosting KVM systems. Every system (host and guest) has its own IPv4, and is reachable from any computer or network. Although they are not connected I ...
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1answer
28 views

routing table with multiple same destination

I'm learning the "route" command for LPIC-1 exam. I cannot figure out how routing works based on the following example: Kernel IP routing table Destination Gateway Genmask Flags ...
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1answer
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SOLVED - Network broken after yum update (using OpenVZ 7 / Fedora / CentOS 8)

I have just installed OpenVZ 7 from the official ISO image. The installation went well, and everything basically working. I can ssh into the hw node without issue. However, after doing a yum update, ...
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1answer
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using a ping command in c code

I`am a beginner in coding so I would ask for help to using this code on raspberry buster in a c program: ping -c 1 -t 1 192.168.1.1;if [ $? -eq 0 ]; then echo "192.168.1.1 is up"; else echo "ip is ...
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Not able to ping the host machine (or any other machine on the network) from the linux docker container

I am using Docker Desktop Version 2.0.0.3 (31259) on my windows server 2016 machine. From the host machine(say A), I can ping to any other machine in the network(say B), but when I run a linux ...
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Can not ping from tun->wlo1 and wlo1->tun

I have created a tun interface from a C program. Now I want to send tcp packets from this interface. But I got an error like No route to host on this step. Steps to reproduce:- Created tun ...
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364 views

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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1answer
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Can't ping EC2 instance after enabling ICMP packets [closed]

I followed this guide to allow me to ping my EC2 instance. In my security group I have Custom ICMP Rule - IPv4, Echo Reply, N/A, Anywhere. However it simply doesn't work. If i run ping ec2-X-X-X-X.ap-...
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1answer
41 views

ping resolves hostname but dig does not [closed]

I'm attempting to set up FreeIPA on a Centos KVM guest and one of the prerequisites is to make sure static hostname is set and that the hostname resolves to guest's IP address. My /etc/hosts file is ...
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2answers
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How do I limit ping (ICMP) responses on a debian 10 server?

I have a VPS with debian 10 installed, primarily used for website hosting. when I issue a ping to the server from a remote machine, I am able to and receive responses for packet sizes up to around ...
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VM in KVM with different network, A can ping B but B can't ping A ? (Bridge KVM network)

I have 2 VM in KVM, and 2 network default and new 1 use defaut network:(virbr0) 192.168.122.0/24 IP: 192.168.122.152. fowarding: NAT the other use new network:(virbr1) 192.168.124.0/24 IP: 192.168....
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OpenVPN server cannot ping LAN behind router

I have an Asus router with IP 192.168.2.1 and a running Openvpn client 10.8.0.2. The Openvpn server (ubuntu 18)has ip 10.8.0.1. Both client and server can ping each other. Now one desktop (192.168.2....
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1answer
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When I do a ping for my CentOS 8 web server, it shows a name that is not the hostname or domain name. where is it getting it from?

I have set my hostname like this: $ sudo hostnamectl set-hostname dev.mydomain.com and I see it got set when I do this: $ hostnamectl status Static hostname: dev.mydomain.com Icon name:...
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1answer
26 views

Problems resolving hostnames on LAN in CentOS

I have a CentOS 7.7 server up and running, which I am trying to access from other CentOS machines on LAN. Unfortunately, I am not able to reach the hostname from other machines. How can I solve this ...
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2answers
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What does the time field indicate in ping statistics?

In the ping output on Linux, what does the time field indicate? It is obvious for individual packets, but not in the summary. What took 5ms in the output below? It is not described in the man page. ...
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132 views

Cisco switch extended ping

I'm trying to use the extended ping on a Cisco 2960-X switch. It's just plain not working for me! Basically, the whole point I'm using it is to have the source be a specific interface (or IP on that ...
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273 views

How to access internet from VM instance in Openstack?

I've been scratching my head for last 5 days, almost went to the end of Internet, read a lot of tutorials, made a lot of re installations an re configurations of openstack but at the and of the day ...
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1answer
94 views

Why the packet loss of ping and traceroute is different

I have an IP address on 12th hop. When I send an icmp request packet with TTL 11 to this IP, the packet loss at the 11th hop is 0%. However, if I ping the IP address of the 11th hop, or use TTL 11 to ...
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Can't connect PC to an Asterisk Server (IP)

I have to connect an external network to an Asterisk Server who is available with an external IP. I tried to ping the server from the network but it's not working. Meanwhile, it's working for every ...
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36 views

Kvm host not reachable even though guests are

I've got a debian server running multiple virtual machines (all debian-based as well) using KVM. Everything went well but some time ago, the host decided to not respond to ping echo requests ...
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48 views

Loopback interfaces is not pinging on both pcs for packet tracer

I am trying to ping my isp ip address (aka loopback 1) and loopback 10 to PC1 and PC2. Whenever I ping both ip addresses and default gateway from pc1 to pc2 it works. However, when I'm trying to ping ...
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2answers
277 views

OpenVPN - Cannot ping server computer from client

I am trying to get my OpenVPN setup working for our remote office. I've installed the OpenVPN community to server and client, created the certificates. Port forwarding rules are also in place, and ...
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2answers
97 views

Unable to reach network namespace through master

I'm trying to create an isolated lab using network namespaces. It works correctly, that is, only the machines in the network namespace can talk. But now I want reach the machines by localhost using v-...
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2answers
41 views

Why ping statment doesn't work on this Linux Ubuntu VM? [closed]

I am not so into networking and I have the following doubt. They provide me a Linux Ubuntu 18.04.3 LTS VM on which I have to install some tools. The first thing that I tried was related to the ...
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22 views

Issue with Check Point Endpoint Security and Windows 10

The command ping (and others) not reply from a PC on LAN to my PC. [desarrollo@centosdev ~]$ ping 192.168.1.34 PING 192.168.1.34 (192.168.1.34) 56(84) bytes of data. ... This issue resolved when ...
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1answer
22 views

VirtualBox Ping strange behaviour

I installed 3 guest systems on my virtualbox. Windows 98, Windows XP and Windows Server 2012 R2. Host system is Fedora KDE Plasma. All VMs are configured with a bridged network adapter and internet ...
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150 views

iptables INPUT rules work but FORWARD does not

Nmap of the network:- Starting Nmap 7.60 ( https://nmap.org ) at 2019-11-09 18:03 IST Nmap scan report for 192.168.56.1 Host is up (0.0011s latency). Nmap scan report for 192.168.56.101 Host is up (0....
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2answers
132 views

Am able to ping my domain, but not subdomain (digitalocean)

My main domain (say: example.com) on DigitalOcean is working ok. I've only one droplet in there. Then I created 'a' record under my main domain with another subdomain name (1.example.com). Then, I ...
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1answer
66 views

NAgios: add/import a list of host to ping, automatically?

I am searching for a way to automatically add a few hundreds of hosts to ping in Nagios. I guess there could be procedure or a file to fill with something like an /etc/hosts file to have Nagios to ...
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1answer
271 views

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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1answer
91 views

measure the latency/delay with ICMP (ping)

How to measure latency (not rtt) using ICMP (ping) on linux ? The Internet Control Message Protocol (ICMP) is a supporting protocol in the Internet protocol suite.
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My server occasionally loses ability to ping (and site goes down)

I am running Nginx on Ubuntu (digitalocean) to host a wordpress site. Every now and again the site will completely go down (500 error) and when I ssh into the server (which I can do) to check it out I ...
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2answers
1k views

Linux ping command getting rtt

I am new to Linux and i am trying to ping a server and i wonder How to get or calculate median of Round Trip Time (RTT) n Linux ? Ping or Packet Internet Groper is a network administration utility ...
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28 views

Ping is not answered on my server but on the backup in same network

I have two servers running on Ubuntu. Both are connected to the internet with a pfSense which also provides a VPN. Problem: I can ping the backup but not the main. I can also not open ssh or any ...
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1answer
44 views

Industrial switches failing to pass broadcast traffic/ARP requests very slow

I'm dealing with some industrial Ethernet switches (Phoenix Contact FL Switch SF 16TX) which are connected to about 5 computers and 5 SLC/5 PLCs. We are having an issue where ARP requests are not ...
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90 views

How ro ping from IPMI interface

I am wondering if it is possible to ping an IP address from the IP address of IPMI board. I tried ipmitool and ipmicmd without success. Many thanks in advance for any kind of help.

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