0
votes
1answer
53 views

Server not pinging even after setting gateway and ip

I am configuring an Icinga monitoring server. I am entirely new to Linux, so configuring after googling each and every bit. I have configured ip address, subnet mask and default gateway correctly. ...
0
votes
2answers
37 views

Android/Linux Ping sends another packet before packet timeout

I have to send 10 packet & timeout for each packet should be 3 secs. As Android pings works on Linux ping commands, I am using below ping command in my application: ping -c 10 -W 3 -s 32 ...
-1
votes
1answer
37 views

Dedicating a server for latency test

I've created a server to test bandwidth from employees working remote (using speedtest.net mini), but was wondering if anyone knew of a way to setup some software in linux to test latency and possibly ...
2
votes
1answer
84 views

Ping to pppoe server fails, while reverse is working

I have created a Linux PPPoE server on CentOS release 5.4 (Final) x86_64 machine (Linux 2.6.18-164.el5 #1 SMP). I have also established the PPPoE connection successfully. However, ping to server from ...
1
vote
1answer
172 views

ping incorrectly pinging 127.0.0.1

I've got an odd DNS issue. I'm running a dual ipv4/ipv6 environment on Gentoo Linux. Pinging some sites results in ping pinging 127.0.0.1. e.g. #> ping authserver.mojang.com PING ...
1
vote
0answers
136 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 ...
0
votes
0answers
87 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 ...
0
votes
3answers
434 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?
0
votes
1answer
153 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 ...
2
votes
1answer
231 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 ...
0
votes
2answers
150 views

How do know if I can SSH in servers?

I have over 200 servers, but is hard to keep tracking all of them by some documents, after a while it gets outdated, so to refresh this document, I have to know which servers I can login via SSH. I ...
0
votes
1answer
135 views

Hping showing -400% packet loss

I used the following command: sudo /usr/sbin/hping3 -q -n -c 5 -S <hostname> -p 8080 and the output I got is: 1 packets transmitted, 5 packets received, -400% packet loss Can you please ...
0
votes
1answer
133 views

debian clients connected to the same switch, ping problems

I have two machines that are connected to the same switch. Machines have multiple ethernet interfaces connected to the different networks. Computer A can ping an antenna which is connected to the same ...
3
votes
2answers
1k 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 ...
0
votes
1answer
62 views

Linux server responds to postgresql querys and ssh only when pinging the server

I have a problem. My developers are using one of my local servers that is located in our office. The server is running PostgreSQL and when they try to make a query to it, it just lags and then gives ...
0
votes
1answer
83 views

Is it worth to set up a different network interface for connections to MySQL?

I have a high load website served by two servers: web server with nginx and php, and database server with mysql. Web server serves all the static content and connects to MySQL and outside world ...
0
votes
1answer
79 views

Ping sometimes resolves the name, sometimes not

Is this a normal behavior, that ping sometimes displays the server name, sometimes only the IP? OS: Ubuntu 12.10 ~# ping development.example.local PING development.example.local (192.168.0.25) ...
2
votes
2answers
396 views

arp packet received larger than packet sent, why?

I'm trying to debug a networking issue. During this process, I've noticed that when I try to do an arping, the received arp packets are larger than sent arp packets, as outputted by tcpdump. (Note ...
4
votes
1answer
172 views

tcpdump on interface when pinging nonexistent hosts on local network

I've statically configured the IP address of an interface on a server: ip addr add 10.40.0.6/16 broadcast 10.40.255.255 dev eth1 If I try to ping a machine on the network (e.g., 10.40.0.1), it ...
1
vote
0answers
135 views

Cannot ping any machine on local network (embedded linux device)

I have an embedded linux installation (custom built using buildroot, uClibc and busybox) and I am unable to ping any machine on my local network. My /etc/network/interfaces file is as follows auto lo ...
0
votes
2answers
112 views

Why I can ping “anything” and I get a response, instead of getting “Unknown Host” [closed]

I can ping any word or domain in CentOS 6 and I get response from the same IP, if that pinged domain doesn't exist in real world. e.g. ping xxxxxx How can I fix this? I want to have normal behavior ...
4
votes
7answers
546 views

Scan for connected, powered on computers on a network?

I want to scan for powered on computers on my LAN and gather logs about that. I tried nmap but it didn't work very well (a lot of switched on computers are not getting detected). nmap -sP ...
0
votes
1answer
100 views

Linux server cannot be pinged

I have set up a Linux server in DMZ. There is another Windows server running in same DMZ. These two servers can be pinged via internet using my home PC. However, the another Linux server rented from a ...
3
votes
2answers
148 views

NTP syncs with local timeserver but not NTP pool servers

I setup an NTP server on a machine in another subnet and tried to ync my machine with the server and it works well. But when I try to ust the pool.ntp.org servers (I tried 0.pool.ntp.org, ...
2
votes
2answers
154 views

Server can be pinged from one server but not from other?

I have set up a Linux server in DMZ. There is another Windows server running in DMZ. These two servers can be pinged via internet using my home PC. However, the another Linux server rented from a ...
2
votes
1answer
337 views

Ping IP: connect: no such process

I am trying to figure out this issue and am getting a weird error. We have two boxes which used to talk to one another on the network. Both are reachable via ssh from a separate network, which means ...
0
votes
2answers
2k views

how to know who ping my computer ? [duplicate]

Possible Duplicate: How can I know when my computer is pinged? I'm using Linux. I would like to know how to tell who is pinging my computer. I have seen this similar question using ...
-1
votes
1answer
696 views

destination host unreachable virtualbox [closed]

Basically i am trying to implement this on this picture I have my static ips assigned more or less like this and i can ping from my internal network to my 2 ports in my router without any problems. ...
3
votes
1answer
433 views

Wget works, Ping doesn't

There are some anomalies on a Virtuozzo virtualized Debian 4 (I know, I'm gonna upgrade this one asap, but there dependences). We run some Websites on this one. And a view Days ago exmi4 wasnt able to ...
0
votes
1answer
69 views

How can I be notified when a server comes back up?

So far I've determined that I can use the ping command to send a ping to said server every 15 minutes or so in a command prompt window in Linux like so: ping -i 900 <server-address> The 900 ...
0
votes
1answer
437 views

Ping6 fail on linux

I have 2 linux box configured with IPv4. I have tried adding IPv6 to them. I have issued this commands on box1: ip -6 addr add fd32:2d7f:f3c1::1/48 dev eth0 And I get this: inet6 addr: ...
0
votes
2answers
257 views

How to configure the name returned from ping?

Currently my Debian-based machine returns whatever name was used to ping it, as it's name when answering to ping: - saturn:~$ ifconfig | grep "inet addr" inet addr:192.168.0.103 ...
6
votes
1answer
329 views

ping with line numbers

Simple question: how to make ping on Linux to show line numbers in output? I mean: 1 64 bytes from www.site.com (2.7.1.1): icmp_req=1 ttl=247 time=17.9 ms 2 64 bytes from www.site.com (2.7.1.1): ...
2
votes
1answer
1k views

Permissions to Ping over an interface

My server is running CentOS 6. I have a Sprint Broadband device connected as ppp0. This connection has a tendency to need restarted, so I'm trying to monitor it with Nagios (this is used for other ...
1
vote
2answers
126 views

eth1 and eth1:0 take different times to echo ping requests?

When I ping 2 different IPs that go to eth1 and eth1:0 on the same server, the ping time is the same but the time it takes for the ping result to appear in the terminal is much longer with eth1:0. For ...
0
votes
1answer
406 views

VM can't ping localhost on ESXi 4

I have some problem, i have 3 VM (vm1, vm2, and vm3). vm1 is normal. ping to internal and external is OK, DHCP is OK. but vm2 and vm3 very strange. DHCP is OK but can't ping to internal and external. ...
-2
votes
1answer
195 views

solaris + why cant ping to default getway

I have Solaris machine with IP 10.10.10.100 and default getway 10.10.10.1 and subnet 255.255.255.0 remark - solaris machine connected to cisco switch via cross cable and from switch to my laptop I ...
1
vote
2answers
2k views

Ping one interface from the other

I have a computer (running Linux) with 2 interfaces eth0 and eth1. eth0 with address 10.0.0.100/24 eth1 with address 192.168.1.100/24 They are connected to 2 different networks (10.0.0.0/24 and ...
1
vote
2answers
347 views

My server doesn't receive responses from pings

if I SSH into my server, and I try to ping another server, I never see the responses. This seems to happen only on urls. I've been able to ping a couple ip addresses. I first noticed this problem ...
3
votes
9answers
4k views

Why am I Unable to ping port 443 on Ubuntu?

I have opened port 443 through iptables: pkts bytes target prot opt in out source destination 45 2428 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 6 1009 ACCEPT tcp -- * * 0.0.0.0/0 ...
7
votes
3answers
8k views

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): ...
0
votes
4answers
1k views

Using watch to run a shell script - but the script goes defunct

So I want to keep an eye on my network connectivity so I can make a report for my ISP. (seems like the modem goes out for about 30-60 seconds about once a day) So I copied this handy little script ...
0
votes
3answers
968 views

why can't access the site when ping the ip it can get through?

When I used the ping command to test my site, it shows OK. When I access the site with ip or domain(sexylingerietop.com), it shows Unable to connect. I put the site on a vps yesterday. The site ...
0
votes
2answers
2k views

Cannot ping linux (RedHat) machine by hostname

For some reason, a linux (RedHat) machine that I have is not ping-able by hostname! It is ping-able by IP address though. I have the same network configurations as another linux (RedHat) machine ...
2
votes
1answer
2k views

I can't ping my gateway, but I can ssh to a remote server. Why?

I'm trying to configure my dorm room network. I'm working on ubuntu. It seems that the dorm building has a host as gateway 192.168.22.254. My route -n looks like this: Kernel IP routing table ...
1
vote
1answer
267 views

ping6 overhead compared to ping overhead

I am testing IPv6 latency from a Linux box, and I noticed this weird difference between IPv4 ping and IPv6 ping: # ping -n -A -q -c 500 speedtest.steffann.nl PING speedtest.steffann.nl (10.3.10.20) ...
1
vote
6answers
615 views

ping response time

I have two sites hosted on two different data-centres. Recently one site has become very slow. The ping response from application server to DB server is not fast enough. How do I investigate the ...
-1
votes
2answers
2k views

Bash ping successful program

I'm thinking that this needs to be changed to a while loop because, at the moment, it'll wait untill all 10000 pings are done. I need this to return when the ping is successful. What are your ...
4
votes
1answer
11k views

How to stop ping output?

I run ping <hostname> command in console and it now outputs hundreds of those rows now (icmp_seq=526 ttl=64 time=0.026 ms), icmp_seq is like 500 or more now. How to stop it? (linux debian) ...
3
votes
2answers
302 views

Odd results from ping

When I run this on an Ubuntu box: sudo ping google.com -c 25 -l 25 I get about 1 line back every 2 seconds despite the fact that it should (if I'm reading things correctly) send out all 25 packets ...