Networking :: Laptop Can Ping Out, But Can't Be Pinged?
Jul 11, 2010
My network is thus (verified with iwconfig and nm-tool):
Router1(dhcp) <---WDS---> Router2(forwards dhcp)
Router2 wireless has laptop1
Router2 wired has server1, server2
Laptop2 is a Dell Inspiron 1520 running Ubuntu 10.04 Desktop. It can always ping other networked devices. When it's wired, everything can ping it. When Laptop2 is wifi, only Router1 can ping it. Why?
Both routers are running DD-WRT v24-sp2 (10/10/09) std. Laptop1 (running Ubuntu 10.04 Netbook) can ping everything but Laptop2, and everything can ping it, whether wired or wifi.
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Feb 23, 2010
I have an old computer I have set Ubuntu up on to use it to learn about web services, networking and sys admin.As a first step I have installed the LAMP packages successfully. I want to reach my ubuntu computer from my laptop through my home wireless setup.
On the server I open a browser put this in the address bar and get to the "It works!" page so assume its correct.I go to my laptop, put the same number in the browser and am told that there's a problem loading that page.I figure ok, could be security or ports or something so i ping it to see if it work on that level and it doesn't.I go to my laptop, get the ip for it and then try to ping from ubuntu to my laptop - that doesn't work either.Pinging the router from both computers works fine though.What do I do now?
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Jul 15, 2011
I am using an virtual machine. where I need to ping from one machine to another. earlier I was able to ping. But after going to google.com once, I cannot ping back to this machine.
But if I gave ping -I eth1 <IP> then I can ping.
I cannot install any package, so tell me solution which includes not installing any package.
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Jun 17, 2010
I don't think I changed anything in my system's configuration, but I wasn't able to access most of the websites. Some loaded perfectly, but for a vast majority of them, Firefox (And every other GUI browser - I tested Opera and Chromium) just showed me a never-ending loading screen. At first I thought it was my ISP, but on the same computer when I booted up Windows XP, everything worked fine.
I then booted Ubuntu back and tried pinging the nonaccesible domains - and they all work! Even weirded - for some of the domains the page's title gets loaded, and nothing more - even in something like 30 mins time. For some, I just get "Loading..." message. And some, as said earlier, work just fine. But I can ping all of them. I wanted to ask You about that issue, but ubuntuforums.org didn't even load. I then tried to use CLI browser links and it works just fine for all my sites and here I am, writing this topic from CLI mode in Terminal.
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Apr 15, 2011
I have installed Micro Core onto a usb of mine and am running it on my laptop. I have been able to successfully obtain a connection and valid ip with my router. As you can see below my wireless connection seems valid computer-end and on my router's page it comes under the list of attached devices.Although this is all fine and dandy, I'm am unable to ping my router or any other computer on my network, I am also unable to ping my laptop from other computers on the network. Also by the looks of it I have having no trouble transmitting, but I am not receiving any packets.
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May 27, 2011
Right then... all DHCP
PEGASUS 192.168.0.101
When being pinged from another PC aok, but also pings back on 192.168.0.100? When being pinged from itself using ping 192.168.0.101 (or 100) all is well - when pinged as ping PEGASUS is says following:
64 bytes from localhost.localdomain (127.0.0.1): icmp_req=1 ttl=64 time=0.033 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_req=2 ttl=64 time=0.044 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_req=3 ttl=64 time=0.042 ms
64 bytes from localhost.localdomain (127.0.0.1): icmp_req=4 ttl=64 time=0.040 ms
^C64 bytes from localhost.localdomain (127.0.0.1): icmp_req=5 ttl=64 time=0.042 ms
The IP says its 127.0.0.1 (home) WTF is going on>. Why has PEGASUS been assigned 2 ips, and when pinging using HOSTNAME why does it point to home?
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Oct 7, 2010
I am able to access internet, can ping other machines and can ssh into other machines. But cannot be pinged (it just hangs), and when trying to ssh into machine, it also hangs (no response)I checked the sshd daemon, it is not runningchkconfig --add sshdreboot, the sshd does not seem to come up.
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Jan 25, 2010
I have a machine running linux with 3 ethernet interfaces attached.
My Ifconfig:
My route output:
eth0 is attached to a laptop, eth1 is attached to a PC. eth2 is attached to a DSL modem, and the server is successfully acting as my internet gateway. The trouble is, my PC cannot see my laptop and vice versa. E.G. cannot ping, host seems down.
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Aug 9, 2011
I recently bought a HP laptop which is showing some issues. To make it precise:
1. I can connect to ethernet & wireless when i am at my university, which are quite good connections.
2. At my home, i share the internet with another guy. The connection is not very stable, in the sense that, sometimes the download speed is 1MiB/s, and sometime 250 KiB/s. I have a old laptop which can connect to it without any problem.
3. My new laptop can connect to it when the connection is better with download seed ~1MiB/s, but could not connect to it when the download speed goes down.
4. "could not connect" means even ping to router takes long time with 90% packet loss. But I can always get connection and ip address from dhcp although i can not ping thereafter. This is true for wired & wireless connection both. Is that a router issue? but then, why can i connect through the other laptop.
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Jul 9, 2010
Ive got a problem on my server ....installed Debian 5 , Webmin and than syscp settung up syscp ready ....
I try to ping "localhost" ansver ping: unknown host
I try to ping "localhost." there is a host with IP 127.0.0.1
I need it to change it in "localhost"
Is that the bind9 maybe?
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Jul 24, 2010
I have two machines on this network, one running Ubuntu and the other running Fedora.
When I'm using the Wireless network on the Ubuntu machine, I cannot ping the Fedora machine. Everything else works. I can browse the net fine.
If I switch over to the Wired Network then I can ping the other machine.
I don't understand why ping doesn't work only over the Wireless. I can ping the router so I'm guessing it's getting blocked by the router but I didn't block ICMP traffic.
I tried asking on IRC and they ran out of ideas too to find out where the problem is.
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Feb 1, 2011
I just installed my first EVER bind DNS server. I am running bind9 on Ubuntu 10.04. Everything seems to be working great except one thing: If I ping a host that I have set up in bind by its HOSTNAME the pings take 5-6 seconds to reply/print to the screen between each echo response. If I ping by the host's IP address, they echo back very quickly.
I have read that IPv6 can cause this, but I have disabled it in /etc/sysctl.conf and the problem still exists.
I know everyone says this can't be a DNS issue, but this never was an issue with dnsmasq (which i was using prior), and it doesn't make sense that the ping are ONLY slow when pinging by hostname and not IP.
Configs below:
Ping by hostname - there is a 5-6 second delay between each one of the responses:
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Ping by IP - the responses come VERY quickly one after the other:
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/etc/resolv.conf:
Code:
Code:
rev.0.168.192.in-addr.arpa:
Code:
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Apr 29, 2010
So, I have an Virtual Machine running CentOS 5.4. It sits behind a hardware firewall which also does NAT'ing. I've set up plenty of these, so I know for sure the firewall and NAT rules are set up correctly. From the host, I can ping anything in my subnet and the gateway. But I can't ping anything else beyond the gateway. I can perform DNS queries and when I try to ping, it finds the appropriate IP address.But from the outside, I can ping the PUBLIC address (It's a 1 public to 1 private address NAT, not 1 public to multiple private). I've tried it with IPTABLES on and off, with no change.
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May 26, 2010
I have Mandriva One 2009.0 (192.168.1.100) on one box and Mandriva Free 2010.0 (192.168.1.118) on the other. I can ping router (192.168.1.1) from both of these boxes but I can't ping one box to the other and the other way around. What's going on?.
Do I have to change some settings in router?. Or is it firewall issue on those two machines?. Both of these boxes are connected by cable. Symbol of the router: TL-WR340G.
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Aug 23, 2009
I have a toshiba laptop with ubuntu 8.10 two partitions one with a crashed xp ubuntu and file storage. my net book is an acer eee with xp.
i have the two connected with a crossover Ethernet. I can ping the ubuntu with xp but ubuntu doesn't ping xp. i have the fire wall off. xp ip is /24 192.168.0.100 default 192.168.0.1 ubuntu is /24 192.168.0.3 defualt 192.168.0.1
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May 21, 2009
I have connected xp and fedora through crossover cable . xp has ip address 192.168.0.1/24 (manually assigned) fedora has 192.168.0.2/24 with default route equal to 192.168.0.1
I can ping fedora from xp computer but i can't able to ping xp from fedora computer.
I have manully edit the /etc/sysconfig/network-scripts/ifcfg-eth0 file with correct subnet mask and ip address because when i tried to give ip address manully in network manager the subnetmask is replaced with gateway address don't know why.
Now i want to share internet through crossover cable . xp is connected to internet through wireless usb adapeter.
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Apr 23, 2010
I try to ping with php : exec("ping -n 1 $ip",$output[],$retval); it works fine in window. but in linux i got this error : ping: icmp open socket: Operation not permitted are there any ways to solve this ?
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Jan 19, 2010
Host - Fedora 12 64bit
KVM
VM - Windows Server 2008 64 bit
bridge-utils
VM can ping host and Internet but host can't ping VM.
I set VM static IP 192.168.0.205.
It turns out dynamic IP - 192.168.0.55
On host:
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Feb 23, 2011
This applies to my 2 opensuse PC's, my Windows PC is fine.I can ping a hostname, say "PC1" but I can not ping PC1.domain.local (even the host PC can not ping it's own FQDN). When I ping just the hostname the ping stats even list the FQDN.Onto the next issue, since all my PC's, have the domain prefix domain.local, my Synology can not. I can ping it's IP and that is it. I can resolve it's name with nmblookup just fine tho and that is what is killing me. How is this not resolving.Even weirder, I can browse to "Synology" in Network Servers under places on the slab.
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May 13, 2011
Even ping google's ip address doesn't work. unknown host error using backtrack4 able to browse net with these settings.
My network settings:
What's the problem with these settings...
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Apr 27, 2011
I can connect to the internet and browse. I'm wired and using DHCP on a Windows network. Updating Ubuntu or downloading programs takes hours for 52MB of updates. Why? I read some articles that mention Network Manager needs to be enabled at the .conf file. Can I edit this using GUI or command line only?
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Jul 11, 2011
I am trying to get a Linux (Slackware 13.37) working in a Windows networking environment. The IT support for this organisation does not extend to Linux support, so I'm limited in what help I can get for this.
I'm trying to get to the point where I can get to the internet to download what I need on this Linux machine.
The situation is this (*fictitious addresses used) -My Linux machine uses a fixed IP address (10.100.150.21)
My Windows machine uses a DHCP assigned IP address (10.100.150.213)Both Linux and Windows machine are configured to access the gateway server (10.100.150.1)So, I can ping the Linux machine from the Windows machine and vice-versa.I can ping the gateway machine from the Windows machine.I can browse Windows Shares on the network via SMB from the Linux machine.I CANNOT ping the gateway machine from the Linux machine with the Destination Host Unreachable message being the error message.
For actual internet access I need to access a proxy server but since the Linux machine can't even ping the gateway server, it fails to ping the proxy.Now, I have been told the gateway is a HW based router and for Windows machine they use some software for authentication to connect to the network. This software isn't available for Linux, so that's why I've been told to use a fixed IP address.My experience of networking is pretty basic and most of the Linux setup is done via running Slackware's setup program.
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Apr 6, 2011
I have a debian server installed with a static ip. Now i am able to ping my ip, but when i try to configure a domain name with the nameserver as my ip, i am not able to ping the domain name
eg:
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Aug 5, 2010
When i ping www.google.es, i get something like:Quote:
ping www.google.es
(wait 20 seconds)
64 bytes from 66.249.92.104: icmp_seq=2 ttl:53 time=80 ms
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Feb 5, 2009
I installed nss-mdns in Fedora Core 10 and can see all the Bonjour published hosts on the lan. However, I am always forced to append the .local domain when referring to a host:
Code:
% ping foo.local
works
[code]....
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Jan 12, 2009
I have an IBM Bladecenter HS21 with 3 blade servers. All 3 blade servers were initially installed with RedHat Linux 4. I then installed ixMOS on one of the blade servers, and Mandriva Linux was also installed (over RedHat) automatically along with ixMOS.
Now, I have some network problems. The other 2 servers with RedHat can ping each other, but it appears that the server with ixMOS/Mandriva Linux is isolated, that is, I can't ping the other 2 servers from it, and I can't ping it from the other 2 servers.
Does anyone have any ideas on what is wrong and how I can solve this problem? One more thing, my installation of Mandriva Linux has no GUI, so I have to do everything using the command line interface.
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Jan 19, 2010
Host - Fedora 12 64bit
KVM
VM - Windows Server 2008 64 bit
bridge-utils
VM can ping host and Internet but host can't ping VM.
I set VM static IP 192.168.0.205.
It turns out dynamic IP - 192.168.0.55
On host:
$ ping -c3 192.168.0.55
fails
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Dec 15, 2010
I have a router which have 4 ethernet ports(eth0,eth1,eth2,eth3,eth4 ) & One ADSL Line & One USB, I need to configure My router eth3 as a WAN & eth0 as a LAN ... using iperf , I am going to findout test a my Application(using iptables) whether my application is correct or wrong ...As of now I configured like server pc1(192.168.1.230)--->eth0(gw)(192.168.1.1)Router--eth3(gw)(192.168.2.1) -->pc2(192.168.2.157)...For eth3 as a WAN and eth0 as a LAN.... But I am not able to ping between two pc's..From router I can able to ping This ipaddress (192.168.1.230,192.168.1.1,192.168.2.1,192.168.2.1 57)
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May 28, 2011
I setup my computer to use dyndns. I can ping my computer from another computer and I get thisping vielma-server2.dyndns-server.com
PING vielma-server2.dyndns-server.com (71.237.223.228) 56(84) bytes of data.
64 bytes from c-71-237-223-228.hsd1.or.comcast.net (71.237.223.228): icmp_seq=1 ttl=53 time=24.8 ms
[code]...
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May 26, 2011
When we use ping, the option -i is referred as the interval time between sending each packet. Is this interval is the same as 'Inter Frame Gap(IFG)'?? As far as I have heard, IFG is introduced in the Physical layer. So using this option can we really change the Inter Frame Gap??If I use 'ping -i 0' which means that the interval is 0, I still get some value of 18.3 or somethin as ipg in the ping output. So IFG and 'ping -i' are same or not??
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