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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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 :: 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 :: 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 :: 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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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

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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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Networking :: Cannot Ping With Command - Ping IP - Address But Can Ping With - Ping IP -I Eth0

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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Ubuntu Networking :: Unable To Ping Over Wireless But Can Ping Over Wired?

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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Networking :: Debian 5 - After SysCp Installation And Configure Ping Valure - Ping - Unknown Host

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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Networking :: BIND9 SLOW Ping When Ping By Hostname

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:

Code:

Ping by IP - the responses come VERY quickly one after the other:

Code:

/etc/resolv.conf:

Code:

Code:

rev.0.168.192.in-addr.arpa:

Code:

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Networking :: Can't Ping Past Gateway / Can Ping Server From Outside

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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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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Fedora Networking :: Xp Can Ping 10 - But Can't Ping Xp

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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Networking :: Ping Using PHP Exec("ping -n 1 $ip",$output[],$retval)?

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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Fedora Networking :: VM Can Ping Host And Internet But Host Can't Ping VM

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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Ubuntu Networking :: 11.04 Networking - No Ping Response - Edit .conf File?

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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Ubuntu Servers :: Ip Ping Is Continuous, Dns Ping Is Discontinuous?

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

[code].....

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OpenSUSE Network :: Nmblookup Resolves But Cannot Ping Netbios Names Or Ping FQDN

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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General :: Ping - Gives Unknown Host Error - Ping To LAN Address Works Fine

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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Networking :: Cannot Ping Gateway Server Within Windows Networking Environment

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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Debian Configuration :: Can Ping Public Ip But Cannot Ping Domain Name

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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Fedora Networking :: "ping Foo.local" But Not "ping Foo"?

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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Networking :: How To Get Connected On Ubuntu

Jan 6, 2011

I have a wireless network that my PC connects to just fine. I did have to change my address to 10.10.10.1 (Cisco router)

How can I do that with Ubuntu?

I will need very specific directions, because I don't normally use Ubuntu.

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Ubuntu Networking :: Can't Surf The Net Nor Can Ping 192.168.1.1?

Mar 6, 2010

I have Huawei B970b (see specs). It a router with wireless and GSM capability. It works ok in XP. I can connect and ping its IP 192.168.1.1. In Ubuntu I can see the wireless SSID and could connect to the router but I can not surf the net nor I can ping 192.168.1.1.

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