Ubuntu Networking :: Router Can Ping - Connected Machines Can't

Feb 16, 2011

I'm running into a curious networking hiccup with my router setup. I have a D-Link DIR-628 wireless router connected to our modem, and a wire running from that to a Linksys WRT-54G (v1.1) in our basement. This setup worked great for a few days, but then suddenly the Linksys stopped routing us to the internet. I can connect to the router page on the Linksys and using the diagnostic tools I can ping the web from there, but none of the computers connected to it can. Everything is fine when connected to the D-Link.

After fiddling around with just about every setting on the Linksys I finally gave up and tried resetting it to factory defaults--and it worked! Everyone could access the internet again. But then, every day or two it locks up again and I have to reset factory defaults again.

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Ubuntu Networking :: Wireless Router Connected - Can Ping But No Internet

Mar 1, 2011

This morning my Ubuntu 10.10 Meerkat desktop suddenly lost internet connection, but stayed connected to my netgear router. After the usual "tried turning it off and on again" methods didn't work, I booted into my Win Vista partition to find that connected no problem. I have another Ubuntu netbook and a Windows 7 laptop in the house as well as an Android. These all connect fine. It appears to be just the desktop Ubuntu.

I can ping my router 192.168.0.1 and log into it's UI via browser. I can also ssh to the box. My router does not do any filtering or blocking. I've tried disabling the firewall and changing the nameservers in /etc/network/interfaces and dhclient.conf as well as the network manager. The network card is a Belkin 54g but I can't remember the exact model no. it was bought years ago.

Code:
$ping www.google.com
PING www.l.google.com (74.125.230.115) 56(84) bytes of data.
^C
--- www.l.google.com ping statistics ---
30 packets transmitted, 0 received, 100% packet loss, time 29004ms

Code:
$traceroute 74.125.45.100
traceroute to 74.125.45.100 (74.125.45.100), 30 hops max, 60 byte packets
1 * * *
...continues to...
30 * * *

When I do a restart of the networking service it spits out the error:
Code:
Ignoring unknown interface wlan0=wlan0
However, as I said the wireless itself works.
/etc/network/interfaces:

Code:
auto lo
iface lo inet loopback
iwconfig:

Code:
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"haters gonna hate" .....

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Ubuntu Networking :: Wireless Shows Connected, But No Internet/Can't Ping Router?

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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Networking :: Ping Connection To Router OK But No Ping Between Boxes In LAN

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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Ubuntu Networking :: Can't Ping Machines On Local Network

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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Ubuntu Networking :: Connected But No Ping?

Feb 28, 2011

I'm having a problem with my computer connecting to a speficic wifi. The problem seems to be between my computer and this wifi, because I can connect to other networks and other computers can connect to this wifi. I do manage to get a connection, but I can't ping any website, I always get an unknown host error.I have managed to connect to this network only once: it wasn't pinging and then it eventually started working, but I don't recall doing anything that made it work.

[Code]...

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Fedora Networking :: Create A LAN Where The Machines Connected Have A Name Binded With The IP's?

Mar 9, 2010

How can one create a LAN in fedora where the machines connected have a name binded with the IP's . The names corresponding to the IPs are stored on a host which can act as a domain name server. The host can have a name of something like test1.test1.org. I am actually working on Globus toolkit where I will be providing grid services to clients. For that I needed a static IP registered with a domain name service. But since I required it only for local network so I thought to create a Local network myself.

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Networking :: Ping Hangs When Connected Over VPN?

Mar 13, 2011

I've configured an FC14 installation and have been able to do everything over the internet as needed. Then I added a VPN client and can connect to the VPN. I can't ping a server I know is available on the VPN. Ping hangs, not getting any response (including timing out).My other Linux box (running all of the same software) can get to the server on the other side of the VPN so I know everything is okay except for my configuration.I had the same problem when I originally configured the other system and remember that I had to manually edit some setting in a file but don't remember what it was.

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Ubuntu Networking :: Can't Ping Localhost When Not Connected To Network

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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Ubuntu Networking :: Connected To Internet But Can't Ping Systems On LAN?

Oct 5, 2010

I've got Ubuntu 10.04 on my laptop and have recently (within the last 72 hours) started having trouble connecting to other machines on my local network. I'm unable to ping both my router and a server set up in the room beside me.

1. I have tried pinging my server and router from other machines and it works fine. Accessing the server via HTTP works from all machines except for my laptop.

2. I am, however, connected to my router via wireless and can access the internet. Also, if I connect via an ethernet cable I am able to ping both my server and router, although I'd love to be able to go wireless.

3. I assume something's wrong with my wireless setup, but I really can't figure out what. Possibly related note: my wireless has been disconnecting unpredictably on my home network (WPA).

Let me know if you'd like to see any command output and I'll get it to you asap! I've got a Dell Studio 1558 w/ the dreaded Broadcom BCM4312 wireless controller.

Code:
user@blue-skies:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

[Code]......

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Ubuntu Networking :: Can't Ping Or Ssh When Connected To Cisco VPN Using Vpnc

Jan 21, 2011

When I connect to my company's VPN (it's a Cisco), it connects just fine and displays the broadcast message, but once connected I can't ping anything or ssh anywhere. Not on the private network, not on the Internet [URL], nothing. I can still browse the web without difficulties when connected to the VPN, but no ssh or ping. With ping, it properly resolves the host name, but I get 100% packet loss.

Once I disconnect from the VPN, a ping of [URL] works exactly as expected.

I don't have any firewalls set up on this host that I'm aware of (unless something is installed and configured by default).

I'm using Ubuntu 10.10, amd64 build.

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Ubuntu Networking :: Connected To Wireless But Cannot Browse Or Ping

Feb 1, 2011

I have a edimax USB wireless and as soon as I plugged it in it worked i.e., it is able to connect to a wireless.

[Code]....

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Ubuntu Networking :: 10.04 Auto Ethernet Says It Connected But Can't Ping Out

Jul 19, 2011

I am unable to connect to the internet at work through the ethernet, previously working. I am not sure of the origin of this problem -- the result of an update or something that I did to the network settings.

In the NetworkManager applet is says Auto Ethernet is connected but I can't ping anything by name or ip address.

The wireless still works without any problem.

I have tried following some of the other threads on similar issues but the fixes proposed on them have not helped to date. And I may have mangled some of the settings files somewhat.

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Ubuntu Networking :: Can't Ping The Router Or Anywhere Else?

Jun 30, 2011

Connected freshly installed 10.04.2 to a wireless network through a router. Everything looks correct -- IP is assigned, connection is on, the system shows up on the router -- except that there is no internet connection and I can't ping the router or anywhere else. According to the router, the wireless signal at the ubuntu system is stronger than at the sitting-right-next-to-it windows system with *working* internet. what is this? Should I replace current driver?

[Code]..

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Ubuntu Networking :: Connect Machines Together (via A Modem / Router Of Course) To Browse Files

Jul 27, 2011

I have 2 machines both using U 11.04, one of them being Studio. I have tried to connect them together (via a modem/router of course) to browse files but I can't connect. I get error messages. I've installed samba and everything.

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Ubuntu Networking :: Connected To Router But No Web?

Jun 4, 2010

i'm connected to my 2wire 2701hg-b, but have no internet. when i plug in directly there's no prob, but wireless is a no-go.

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Networking :: Cannot Ping Wireless Router Or Access Router Settings - Wireless ?

Jun 9, 2010

I moved my server and network equipment, and now the wireless works but I cannot get my server online. I host a website, so this is kind of urgent.

I have a wireless router and can access the internet fine on my laptop. My server is wired & connected to the router. It sets up the networking properly.. ifconfig has an ip address, the default gateway is present. But I cannot ping google, or even the router. It says destination host unreachable.

So I go back to the laptop to check the router settings.. sometimes it likes to assign the server the wrong internal ip. But, I can't access the router settings either! The page (192.168.1.1) times out. Same with trying to ping the router. How can the laptop be online if it can't reach the router?

Oddly, ifconfig on my laptop reports an ip address starting with 99.233. It's always given me an internal address starting with 192.168. What's going on here? Is the router not allocating an internal ip? I use wicd to connect, if it's relevant.

We have a windows laptop that can only get a "local connection". Now it does sound like the router is forwarding directly to my laptop, instead of allocating internal ips.

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Ubuntu Networking :: When Trying To Ping The Router (192.168.0.1), Get No Response?

Feb 3, 2010

I am a new user of Ubuntu...I am trying to use if for a University project. I have installed Ubuntu under a nice new partition and install was smooth. I am using my Belkin F5D8055 v1 USB adapter to connect to my router. The router registers that the IP 192.168.0.3 has connected (thats the IP assigned to the adapter) however even when trying to ping the router (192.168.0.1), I get no response.

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Ubuntu Networking :: Router Appears Down But Can Ping It

May 20, 2010

Every three or four weeks my router and cable modem will appear to go down. Not only can I not access the internet or web, but I can't even access the router and modem's admin pages (192.168.2.1 and 192.168.100.1 respectively). However, I can successfully ping 192.168.2.1 (forgot to try pinging the modem ip).

Hard resetting both by unplugging them for about a minute or so and replugging them fixes the problem. This is what Roadrunner says to do any time connectivity is lost. This problem also used to occur on Windows as well, except that on Windows I could still browse to both the router and modem's admin websites and restart them remotely. On Ubuntu (both 9.10 and 10.04) I have to manually unplug them since I can't bring up the admin sites in a browser.

I'm not sure how to go about troubleshooting this issue, and why Linux seems to require a manual hard reset whereas it could be solved on Windows with a remote restart. I wouldn't have thought the OS would even have anything to do with that.

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Ubuntu Networking :: Ping Router But Not Googling

Nov 23, 2010

I tried to get Ubuntu 10.10 up and running last night, almost worked, but wireless card isn't working. I have another machine in the house running ubuntu 10.4 and it works fine. I have searched around a bit in the forums and can't find anything, so I thought I would make my own post. The wireless card is an Intel PRO/Wireless 2200BG, which I think is part of core (i think i read that somewhere).

I think the problem might have something to do with the ip address (currently 192.168.0.100), i remember having issues in the past with that, but I could be wrong. when I run iwconfig i get

[Code]....

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Ubuntu Networking :: Server Can't Ping The Router

Jan 2, 2011

I'm setting up a home network and trying to set up a Ubuntu Server (10.04) as a samba file server and a web server.I installed Ubuntu 10.04 Server and the automatic network configuration during installation failed. I've looked into host.conf, networks, interfaces, hosts and resolv.conf and either my settings are wrong or it's something else. I have a Win7 computer connected to same router and DSL modem and it works fine (edit: most of the time--- see below).

More information:

*ifconfig shows eth0 is broadcasting but without an IP address
*route shows an empty routing table

Code:

sudo route add default gw 192.168.1.254 doesn't work:
SIOCADDRT: No such process
[code]
sudo /etc/init.d/networking restart doesn't work:

[code].....

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Fedora Networking :: Wireless Shows Connected Won't Browse Won't Ping?

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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Networking :: Ping Windows Machine Connected To An Open Network?

Jul 9, 2011

I am trying to ping my Windows machine connected to an open network (I'm at a internet caf) from my linux VM (also connected to the same network with a usb adapter), but I'm obtaining this output:

# ping 10.23.47.12
PING 10.23.47.12 (10.23.47.12) 56(84) bytes of data.
From 10.128.128.1 icmp_seq=1 Packet filtered
From 10.128.128.1 icmp_seq=2 Packet filtered

With high probability host 10.128.128.1 is a firewall or some router with packet filtering mechanism; but I don't understand how it can be possible to implement this kind of solution, with what kind of software or hardware? I also tried a nmap scan to my Windows machine but it returns me scan results from another host(the firewall or the router I suppose):

nmap -sS -O -P0 10.23.47.12
Starting Nmap 5.51 ( http://nmap.org ) at 2011-07-09 15:46 CDT
Nmap scan report for 10.23.47.12
Host is up (0.097s latency).
All 1000 scanned ports on 10.23.47.12 are filtered

[Code]...

So my questions is, how is technically possible to implement this kind of restriction within hosts connected on the same network? It's the first time I see this kind of configuration.

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Ubuntu Networking :: Connected To Router But No Internet?

Feb 21, 2010

just installed Ubuntu Netbook remix on my acer aspire one, and come across a problem Ive never faced before. Im able to Connect to my router (and access it through the internal ip address) but as soon as i try access anything outside of my network there is nothing!

This i found odd as first i thought it might have just been my Routers problem, but seeing as all my other computers were connected to it with no problems (wired and wireless) I quickly traced the problem back to the laptop.

After this i decided to see if after a simple update would fix the problem. so i connected it up through the Ethernet port once again it connects to the router but no internet! I have tried everything in my knowledge, but with no success!

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Ubuntu Networking :: Connected To Router But Not Internet?

Sep 26, 2010

I am connected to my wireless network but can't connect to the internet. I have searched the ubuntu forums for solutions but none seem to work for me. I can post terminal outputs if required (I know that much).

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Ubuntu Networking :: Connected To Router But No Internet

Sep 1, 2011

I'm running a Natty machine wired to a TP-Link router (TL-WR841N) with additional Ubuntu and Windows machine on WiFi. Recently I've had some problems with connectivity on the Natty machine. Connectivity is fine as far as the router, but not beyond it. This applies to all browsers, Software Center, Aptitude and anything else you can think of. Now, normally at this point I would call my ISP, but the thing is, all other machines have connectivity. I've checked the cables twice and anyway, if it were them, I wouldn't be able to ping the router. Router has ping functionality to outside and it's working, have tried ubuntu.com and google.com. Also, connectivity between the wired and wireless machines is fine, pings are flying across the network beautifully.

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CentOS 5 Networking :: Can't Even Ping To My Router

Oct 2, 2009

just finished installing Centos5 and I had no problems installing it. But when I tried to connect to the internet, the trouble began.My network card is installed and the status is "OK". The network card is a "Realtek RTL 8168C(P)/8111C(P)".The status of the device said "Inactive" and when I tried to activate it, it came with an error: Failed; no link present. Check Cable?Now the cable is connected as it should be.So next step I did is put in a static IP. Now the activation works fine.However I still have no internet. I can't even ping to my router!I need some new drivers for my graphics card too, but first I need the network to work, than I can download other stuff..

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Ubuntu Networking :: Wireless Connection Can't Even Ping Router

Feb 4, 2010

Previously posted under "Wireless Connection Can't Even Ping Router".I've been using Ubuntu for two years. About a year ago I switched to Kubuntu because I prefer the KDE desktop. Two weeks ago I bought a new laptop: Dell Vostro v13. I installed Kubuntu 9.10 from the live CD and everything worked! Well, almost. I also set up a home wireless network with a new Belkin N+ router from WalMart. When I try to connect to my router, the Plasma Network Manager reports that I'm connected and the assigned IP address, but I'm not truly connected! I can't even ping my own router, all packets are lost.

This problem is intermittent, sometimes I connect fine. I dual-boot with Windoze7 and it connects without problems. Also, if I connect with Windoze, then re-boot into Kubuntu, it seems to "wake-up" the connection somehow and it works. I might also add that I connect without difficulty to other routers in my neighborhood, at work, in airports, etc.My old laptop was also running Kubuntu 9.10, and it connected to the Belkin router without problems, although it was a different wireless card and driver. I also tried Ubuntu 9.10 from the live CD and it also reported a connection, IP address, etc. I couldn't ping the router from that connection either!

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Ubuntu Networking :: Homepage Routed To D-Link Router Login Page On Local Machines?

May 20, 2011

In addition to 2 "desktop" machines, I recently set up an Ubuntu Server with Apache2, but when I try to access my www.homepage from a machine locally connected to the same router (via both wired & wireless interfaces), I am directed to the Login page of the router, not to the www.homepage. Yet, when I access the www.homepage from elsewhere, my www.homepage is accessible.

I can browse to my www.homepage by entering the local IP address into browsers on both local machines, so I know the machines are talking to each other. Just not letting me get in via normal internet browsing channels.

Server: Ubuntu 11.04
Webserver: Apache2
Router: D-Link DIR-615
IP Address of: 192.168.0.110 (reserved on router, static on server)

[Code]....

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Ubuntu Networking :: Configure Scanner Connected On A Router?

Mar 24, 2011

I have a router Asus RT-n16 where i've connected my EPSON DX5000. I've configured the printer function, adding the printer as AppSocket, adding router IP and port 9100 (socket://Router_IP:9100), but now i can't get the scanner function.

I've installed packages from here[URL].do (iscan) and adding on /etc/sane.d/epkowa.conf the line

Code:
net 192.168.1.1 #my router ip
but it's not working. When i run scanimage -L i get this message:

No scanners were identified. If you were expecting something different, check that the scanner is plugged in, turned on and detected by the sane-find-scanner tool (if appropriate). Please read the documentation which came with this software (README, FAQ, manpages). The scanner option worked fine when my printer is directly connected at my computer.

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