Networking :: "ping" Shows Different Delay From Two Computer On The Same Network?
Jul 20, 2010
I am using "ping" on 2 computers on the same wifi network.One of them shows a bigger delay than the other consistently.I am trying to find out what may be the problem.. Can someone suggesta way to investigate this issue or isolate the problem?Both of them sending "ping" at almost the same time.First laptop (much newer laptop model)
Code:
PING www.l.google.com (64.233.181.104): 56 data bytes
64 bytes from 64.233.181.104: icmp_seq=0 ttl=48 time=1011 ms
[code]...
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Apr 20, 2010
I posted the same problem before but did not get answers, I guess due to the unattractive title. I have two Ubuntu machines, both desktop version with a server installed on top. They are both on the same network. It seems that when I restart the remote computer, I can ssh to it fine for a while but then I get the following:
Read from remote host: Connection reset by peer lost connection.
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May 2, 2010
Installed Ubuntu 10.04 on my Sony UX280p with Intel 4965 wireless. Ubuntu detects the card without issues (as far as I can tell). I can see all access points in my area and select my access point and pair with it. I get a DHCP address from the AP (if ifconfig is to be believed) and iwconfig shows the ESSID of my AP but I can't ping the AP or any other computer on the network, nor can I ping the sony from any other computer on my network. Last year I had installed 9.04 on this computer and wifi worked out of the box without any issues.
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Jan 31, 2010
I have recently installed Fedora 12 on my pc but I am not able to browse the internet although the network icon shows the computer is connected.
I tried the dig command and got the following message:global options +cmd; connection timed out; servers could not be reached;
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Nov 22, 2010
new installation of fedora 14 intel pro/wireless 29251abgeverything ppears to be workingbut ping doesn't workand firefox doesn't workping resolves names but doesn't ping??
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Dec 4, 2010
I've encountered a problem after doing a fresh install with xubuntu 10.10 (2.6.35-23-generic).some sites are blocked like [url]....if I do dig [url]....- I receive the A, CNAME records and the IP address and everything.when ping[url].... - I receive 'unknown host'.when ping <theipaddress> - I receive responses
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May 11, 2011
unreachable computer's ifconfig reports xxx.xxx.xxx.37 but when I ping that address from another computer it says "Destination Host Unreachable" (all the other computers on the LAN can ping each other except this one particular computer)I can ping other computers from the unreachable computer just fine...
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Sep 14, 2010
So I installed 10.4 on a new Toshiba Satellite L645DWhen I connect to my wireless at home, the Network Manager shows that I am connected but I can't reach any websites via ping or firefox. I also can't ping my router. I also don't have wired access working at all.iwconfig shows connected to correct ESSIDI can ping localhostcan't ping google:
Code:
ping: unknown host www.google.com
can't ping my router (192.168.2.1):
[code]....
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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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Apr 30, 2010
I installed Fedora 12 on my laptop. I have a wireless connection to the internet that works fine, I attached an Ethernet cable from this laptop to a windows machine. There is a green light.
I can ping my localhost. I can ping the windows machine using it internal IP address via the router. However, the eth0 IP address does not work when I ping to it from the windows nachine. Also, I cannot ping to the windows machine using the IP address associated with the Ethernet connection.
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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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Sep 20, 2010
I have a desktop computer (Ubuntu) connected to one of the LAN ports of the Cradlepoint MBR1000 router via an Ethernet cable. I also have a Verizon mobile broadband USB modem (USB760) plugged into the USB port of the Cradlepoint router.I also have a laptop (Ubuntu) with a wireless wi-fi adapter (802.11g). The laptop also has an Ethernet card but I'm not using it. The desktop computer does not have a wi-fi adapter, only the laptop does.
With the above setup, I have Internet access to both the desktop computer as well as the laptop computer, which I am well pleased with.Is there a way I can have file sharing between the desktop and the laptop, or at least ping between them, the way I have it set up? I can't use the ad-hoc method because for that to work each computer needs a wi-fi adapter. The router is using DHCP but can also be configured manually.
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Jun 14, 2010
Using Xubuntu 10.04 to connect to some Windows XP shares by adding lines to fstab. The network shares are not mounted at boot, but can be mounted from the command line, after the OS has booted and everything is up. I am suspecting the network isn't up yet, when fstab is processed. I tried adding the option "_netdev" to the relevant network share lines in fstab, but the shares still don't mount automatically at boot up. I read that this option only works for NFS and I am using CIFS. Can someone confirm that _netdev only works for NFS ?
I've seen solutions involving running a mount script after the OS is fully loaded, or running a cron job to periodically check the status of the share and mount if needed. Good workaround but doesn't address the root cause. Is there any other way (besides the _netdev option) to delay mounting of network shares that appear in fstab until the network interface is up ?
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Mar 1, 2010
I have been trying (unsuccessfully) to remote access my girlfriend's Ubuntu machine to fix a few things. The problem is that she lives in Japan and I live in RI, USA! Is it even possible to ssh or Remote Desktop her computer with such a high ping rate? (average ping time is 300ms) If so why can I not connect?
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Feb 5, 2010
I all, I 've two computer with Ubuntu 9.10 (desktop version)connected by cross over cable.
I try to connect this computers in LAN with the following command:
ifconfig eth0 [address] netmask [netmask] up
When I ping from first computer to second the output is "Network is unreachable"
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Nov 11, 2010
My wifes networked computer connected to the network just fine when it was Win XP. Now that Ive converted it to 10.04 (completely) it can see the network, but it just wont connect to it. I had no problem converting my computer to Ubuntu and it sees the network and accesses it great. Files, folders and hard drives are all shared. So, one computer connects great, the other does not.**I dont know what to do at this point.Here is the layout:My Comp (10.04) ---------......Main Network Comp (XP)Wife Comp (10.04) -------/The main network computer is XP as it has software on it we need that does not work in Wine. The main computer will have to stay XP. I cannot get my wifes computer to connect to the main system, although mine connects just fine. I dont know what the problem is. Her computer sees the network, but when trying to connect, it times out and says unable to connect.
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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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Jun 7, 2010
i want to find ip address of other computer which are connected in LAN..suppose ther are 5 compter in LAN and i want to find ip of all remaining 4 computer using my computer only in command or any other way is ther....
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Apr 30, 2011
I can ping the router, but I cannot ping anything outside of the network. The ping just sits there and eventually times out, no error message. I cannot download updates and it is the only box inside the network having any issues accessing the internet. I am running 10.10 server. I can get a list of packages on the update server, but not download them, it appears to be in an incoming issue. I'm using a motorola Netopia router in bridge mode with a netgear SRXN3205 as a router. Again every other system can download fine. I have tried running on one nic, no help dhcp, static again does nothing. I can pulls host [URL].. and I get
[code]...
It may be worth noting that I set the box up at home on a dlink router and it worked fine, however I am confused why it is the only system on the network having these issues every other box can ping just fine.
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Jul 14, 2011
i have problem ubuntu server network! internet works but #cant ping [URL]... and outside ip?
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Jan 28, 2009
cannot ping internal network
I am a new user to Linux but in the last couple of months gained some Idea about it,I am trying to set up a small network in my office having 3 windows xp PCs, two fedora10 PCsI have an adsl router with 4-port hub connecting to the internet, one switch (say sw1) and one linux PC (say linux1) is connected directly to the router, the three win xp PCs are connected to switch sw1.all the above is working fine, I am able to get connected to Internet In all the systems, and able to network among all the above four.Now I want to make the linux1 as a proxy server for, hence I added another network card into it connected it to another switch sw2, which is connected to another linux pc (say linux2).
I have tried a hundred things, and googled an equal no. and finally posting it here.In order to reduce confusion I have disabled DHCP in all machines, and given static ips insteadNetworkManager was not happy about it, hence to fix my static IP i disabled NetworkManager ('chkconfig NetworkManager off')
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Aug 27, 2010
Is there a way to disable ping in the network instead ping of IP addresses must be hostname or a name.
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May 27, 2011
I've got a computer hooked up to my TV and it seems that all video files have audio that is a fraction too early. The files are fine on my laptop. I wonder if there is a way to delay all sound on the computer to help with this problem.
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Jan 8, 2010
I'm encountering a strange problem. I need to open and forward all UDP and TCP ports related to VoIPtelephony (5000:32000) in the Suse 11.1 server that's acting as router/firewall in our setup. The ports must redirect to a Asterisk server in the local network. (This server has the IP adress 192.168.0.3)I've opened ports in Yast (Firewall>Ports>Advanced) and putted in some masquerading rulesirewall>Masquerading):0/0,192.168.0.3,tcp,5000:31000,5000:310000/0,192.168.0.3,udp,5000:31000,5000:31000when I do a nmap localhost I get:Starting Nmap 4.75 at 2010-01-08 16:52 CETInteresting ports on localhost (127.0.0.1):
Not shown: 991 closed ports
PORT STATE SERVICE
21/tcp open ftp
[code]....
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Aug 11, 2010
I have a somewhat complicated network setup that I am testing on an internal network. I have the following route setup:
PC Client (192.168.2.100) --> Router (192.168.2.1) --> DSLAM (on our internal network) --> PPPOE Server (192.168.9.1) on Linux Ubuntu 8.04 on interface card eth2.
On the same Linux Ubuntu Machine on interface card eth1 (static IP 192.168.5.100), I have an Asterisk SIP server plugged into it. SIP Server = 192.168.5.101 (static) I need the PC client (192.168.2.100) to register via SIP soft phone to register on the SIP server (192.168.5.101). From the PC client I can ping as far as the eth1 interface (192.168.5.100)...but cannot ping the SIP Server (.101).
From the SIP server (192.156.5.101)...I can ping 192.168.5.100, I can ping 169.254.5.228 (Eth2:avahi), but not sure what that is. I cannot ping the pppoe default gateway (192.168.9.1), which I think you cannot anyway. No firewalls are running. My IPtables I cleaned out totally. I think it might be as simple as a route add, but I really have no clue. Tried building a virtual bridge using brctl LINUX betweeh eth1 and eth2, but that made things worse (could not ping anything after that)
Route table:
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.9.100 * 255.255.255.255 UH 0 0 0 ppp0
192.168.5.0 * 255.255.255.0 U 0 0 0 eth1
[code]...
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Jan 11, 2011
I have ubuntu 10.4 running on both my desktop and laptop. Both machines are connected to the router in wireless mode with Wifi.I can access internet from both machines without any issues, however I cant ping one machine from another. (and vice versa)
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Mar 7, 2011
I have two linux servers, I tried to ping from one linux box to another and vice versa but error message is "connect: Network is unreachable" Where as If I tried from windows machine I am getting the reply from both the servers.
C:Documents and Settings>ping bnkprod
Pinging bnkprod.softtech.com [172.20.40.141] with 32 bytes of data:
Reply from 172.20.40.141: bytes=32 time=16ms TTL=64
Reply from 172.20.40.141: bytes=32 time<1ms TTL=64
Reply from 172.20.40.141: bytes=32 time<1ms TTL=64
Reply from 172.20.40.141: bytes=32 time<1ms TTL=64
Ping statistics for 172.20.40.141:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 16ms, Average = 4ms
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May 8, 2010
OS: Ubuntu 9.10 Karmic Koala
Programs: Network Manager, Ndiswrapper, Device Manager, Terminal
USB Adapter: Linksys WUSB11 v2.8 Driver 4.10
Router: Linksys Wireless-G 2.4ghz
SSID: Doss
Security: Unprotected
Mac Address: Disabled
Whenever i use to type in lshw -c network it used to show details about stuff, but now when i do it it shows nothing.
Also i did whatever was in this thread
how to install windows wireless drivers
i restarted my pc and now i cant even see the wireless network! it doesnt even say enable wireless networking in the network manager!
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Jun 23, 2010
So in an effort to increase the speed of my netbook, I removed Ubuntu and installed Lubuntu on it. When I tried to mount my samba share as I normally do, I noticed it wasn't able to connect - mount error(113): No route to host. Sensing something fishy, I attempted to ping the machine (both by name and by IP) - Destination Host Unreachable.The machine I'm trying to connect to is using Ubuntu 10.04 x64. I attempted to ping the other way and it was able to connect to the netbook just fine. When the netbook was using Ubuntu, it was connecting fine. My iptables check out ok, but here is the output of iptables -nvL:
Code:
Chain INPUT (policy ACCEPT 213 packets, 21635 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
[code]....
Does lubuntu have some funky firewall built in to it that I can't find? (I've Googled for information on a Lubuntu default firewall and can't find any)
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Jul 8, 2010
I'm having trouble pinging localhost, specifically, pinging localhost when I'm not connected to a network. When I try it keeps telling me the operation is not permitted:
Code:
matt@mubuntu:~$ ping localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
if I connect to the network, start pinging then disconnect it continues pinging. Google seems to think it could be something to do with my iptables setup:
Code:
matt@mubuntu:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
[code]....
When not connected to network
Code:
matt@mubuntu:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
But as far as I can tell there isn't anything in there which would stop me connecting to the localhost (I also can't connect to my local apache instance when offline)... (It's worth mentioning that a couple of weeks ago I had the pc setup to share it's internet connection with a laptop, ala this guide, however I've since disabled the iptables rules and disabled ip forwarding.)
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