Fedora Networking :: 14 And Hyper-V - Can't Ping Or Connect To Other Hosts
Nov 11, 2010
i'm running some virtual Fedora installations on a windows server 2008 with hyper-v. Most of them are Fedora 12 and 13. Everything works fine for some years. Yesterday i want to upgrade a F13 machine to F14 by netistall. The upgrade ran without any problems. After the reebot the machine was off the network. All the networkconfigs by DHCP are OK, IP address, gateways, DNS settings and so on. But the machine can't ping or connect to other hosts. I tried an VM from scratch with both F14 i386 and x86_64 - same ****. This is the first time i had such a problem by upgrading Fedora machines.
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Jun 25, 2011
Not sure what iis going on, I can ping some hosts on the internet but not others see below (adobe is not the only example) Works OK from another host on the same network with same GW and DNS iptables is turned off
[root@havoc init.d]# ping www.arrl.org
PING www.arrl.org (184.106.62.248) 56(84) bytes of data.
64 bytes from www.arrl.org (184.106.62.248): icmp_req=1 ttl=55 time=94.1 ms
64 bytes from www.arrl.org (184.106.62.248): icmp_req=2 ttl=55 time=93.0 ms
64 bytes from www.arrl.org (184.106.62.248): icmp_req=3 ttl=55 time=99.4 ms
64 bytes from www.arrl.org (184.106.62.248): icmp_req=4 ttl=55 time=96.8 ms
[Code]...
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Jul 21, 2010
The wireless connected hosts do not respond to pings from wired ones or other wireless ones. And all the wired connected hosts respond to pings from any wireless one. The same problem applies also to ssh connections exactly as in the ping issue.
The switch the ADSL modem/router and the Access point are all 3 different machines correctly connected to each other. I do not have a firewall in any of my hosts, all run Slackware 13.1, the wireless ones use "wext" driver and not "ndiswrapper". All wireless hosts login successfully, WPA & DHCP works fine and internet connection goes without a problem. But the fact I can only connect from a wireless host to a wired one is puzzling.
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Nov 20, 2010
Host machine is a "2.6.32-24-generic-pae #38-Ubuntu" and VMware Workstation version is 7.1.2 build-301548.In addition to those three IP addresses(192.168.1.254/24, 192.168.1.68/24 and 192.168.1.221/24) seen on a drawing, there are four identical virtual machines inside the 192.168.1.68/24 machine. Virtual machines are named Olive0-3. Olive0 has IP address 192.168.1.100, Olive1 has 192.168.1.101, Olive2 has 192.168.1.102 and Olive3 has 192.168.1.103.
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Jul 26, 2011
I am using centOS 5.0. After I change from DHCP to static IP address, I cannot ping hosts on the same subnet. The error message says destination host unreachable. Before I made the changes I was able to ping and now even I change it back to DHCP I still cannot ping with the same destination host unreachable message. The centOS is running on VMware on a Windows host.
ifconfig shows
eth0 Link encap:Ethernet HWaddr 00:0C29:A1:9A:10
inet addr: 192.168.0.202 Bcast:192.168.0.255 Mask: 255.255.255.0
inet6 addr ......
After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows ? (192.168.0.106) at <incomplete> on eth0 I tried different ways by disabling the firewall and and disabling SE protection. No Luck.
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Mar 20, 2009
Code...
What I can ping
Host A -> Host B
Host B -> Host A
Host A -> Router B
Host B -> Router A
Host A -> OpenVPN B
Host B -> OpenVPN A
VPN Server -> VPN Client
VPN Client -> VPN Server
What I can't ping
VPN Server to any client side host local address
VPN Client to any server side host local address
I have searched and searched for this but can not find any answers. Why can I not ping Host B from my OpenVPN server?
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May 20, 2011
Environment
Linksys WRT54G Wireless
Laptop wireless Windows/XP
Windows/XP Hyper Terminal
Desktop Server Linux OEL 5 (not wireless) cable connected to the WRT54G router port. (I can go to the Internet with this server, but not able to communicate other computers on the WRT54G Wireless Network. Even though, the Linux Server is connected to the WRT54G router port.) From the Hyper Terminal Wireless laptop Windows/XP, I want to connect to my Linux Server.
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Jul 15, 2011
In my home network I have two ubuntu desktops that are connected to a router. On each pc I have installed Virtual Box 3.2 and various OSes. I need to sometimes run multiple vm's at the same time which is very RAM intensive so I was wondering if there is any way to connect VM's on different hosts so that they appear they are in the same network? Various articles that show up as search results hardly pertain to what I want to do. Basically, I would like to make vm's visible in the network but on different hosts and with ip addresses that would reflect that those vm's are on a same network. Like ubuntu 1 has vm's a and b and ubuntu 2 has c and d. When I start all of the vm's, I would like them to connect to each other just like they are in the same network without "knowing" they are on different hosts.
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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 26, 2011
I have a php scriptI want it to ping list of ips from a databse(using fping) and based on the status of the values to put them in a field(status) into the database(0 if down,1 if up)i executed tghe script and it gives me this error:Thread 1 - 17:51:01 26-04-2011 4.2.2.2 alive Couldn't execute query.I cant see what 's wrongthis is the source of the php script:
<?php
require_once("conf.php");
$connection1 = mysql_connect($h, $u, $p) or die("Couldn't connect.");
[code]....
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May 21, 2010
I am very new to Linux, 1 week old. Have just installed fedora 5 days ago and I now need to get hosts to connect to this server through telnet. I downloaded a xinetd rmp file but do not know what do next to get it installed and configure it.
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Jun 27, 2011
Problem:Your company network has internal only hosts / websites with names that end in .local, e.g.Your freshly installed Ubuntu machine works fine on the network, has internet access, etc. but cannot connect to these particular systems.Testing DNS with tools like dig / nslookup works fine, but normal name resolution with ping / telnet / browsers does not work.Solution:1. Open a terminal window2. Enter the command sudo nano /etc/nsswitch.conf3. Change the following line:hosts: files mdns4_minimal [notfound=RETURN] dns mdns4to this:hosts: files dns4. Press Ctrl-X, Y, Enter to saveExplanation:Ubuntu ships configured to do name lookups for self-configuring networks, based on the AppleTalk / mDNS / Bonjour protocol. In the configuration shipped for the resolver, this protocol is considered the final aurhority for the ".local" top level domain, and DNS will not be checked. The above configuration change eliminates this and restricts lookups to (a) /etc/hosts file, followed by (b) DNS
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Jul 29, 2011
I have installed openvpn on an ubuntu 10.04 server. I run 11.04 on my desktop. It can connect to my VPN server. The problem is, I have ZERO internet access. I cannot even ping an IP address.
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Aug 17, 2011
Well, as many proxy applications, GNOME Network Proxy Preferences only allow to ignore hosts. What I want to do is exactly the opposite. I only want to use the proxy for few sites. Is it possible to define only the allowed hosts in any way?
PS: I know FoxyProxy add-on for Firefox does this, but 1)I don't use Firefox and 2)I want the proxy settings system wide not only for browser.
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May 2, 2010
I have an Acer Aspire One that worked fine with version 9.* of Ubuntu, then I upgraded to v10.1. Now Thunderbird, Evolution, and Firefox (Namoroku?) can't connect, either wirelessly or by Ethernet cable, to my ISP. I get error messages like "connection timed out" or "cannot find {link}". I can PING my ISP from Terminal, though, and I have the machine set up for dual boot with Windows 7 and Firefox works fine under Windows.
I have no idea what to look for or where to start. Any help would be greatly appreciated.
Here's the output from sudo lshw -c net
*-network
description: Ethernet interface
product: Atheros AR8132 / L1c Gigabit Ethernet Adapter
vendor: Atheros Communications
[Code]....
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Apr 22, 2010
I have a box that I installed Elastix on as I'm trying my hand at Voip and Linux. I'm basically very green when it comes to Linux and the console. As I was following a guide @ engineertim.com to securing the box, it asked me to: wget [URL], But I get: Resolving engineertim.com... failed: Temporary failure in name resolution. I searched around and tried configuring resolv.conf to no resolve - :) unintended pun
I changed /etc/sysconfig/network to include GATEWAY=192.168.1.1 From the internet I have a modem-192.168.2.1, a telecom voip box-192.168.15.1, and then my router 192.168.1.1 I'm able to ping machines attached to the router but nothing beyond that. I tried to get the results for ifconfig via putty on this machine but it says command not found. I can get it when I log in at the box in question though.
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Jun 4, 2010
Tried turning firewall off, i tried port forwarding tcp port 22, but it still doesn't work. Also am unable to ping modem over WAN, i can ping the modem locally though. Tech support claims pinging and ssh is not part of the internet so they wont support it in any way.
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Feb 26, 2011
I just setup a new LAMP server (CentOS 5.5 x86_64) box with channel bonding on NetXtreme II BCM5709 Gigabit Ethernet (IBM x3650 M3). The problem is I wasn't able to connect to this server when I'm in different VLAN's. This server also unable to ping different VLAN's. But everything works fine when I transact in the same VLAN.Here's the config:
Datacenter VLAN = 9
Firewall = Disabled
SELinux = Disabled
[code]...
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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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Jan 31, 2010
I've only been using linux for a few days so I don't know all the tricks. I'm pretty savy configuring windows networks however.My adapter is (according to windows) a: CNet PRO200WL PCI fast ethernet adapterLinux says it is a: 21x4x DEC-tulip compatible 10/100 EthernetI do seem to be getting an ip address from the DHCP router, but I cannout ping any other ips or connect to the internet.I've tried a bunch of different options, switching things back and forth, but it still doesn't work, and honestly i don't even know what some of the options mean.
ALSO, if this helps:
paladin:~ # ifconfig eth0
Eth0 Link encap:Ethernet HWaddr 00:08:A1:03:3C:99
[code]....
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Oct 15, 2009
As the title suggest, I have downlaoded the latest copy of Ubuntu Server from the ubuntu website.Everything installed fine. DHCP configured ok as far as I can tell. I can ping other machines on my network (which are running Windows) and they can ping the Ubuntu machine and conenct to Apache which is running on it.If I try to ping google.com or any other domain, it gives the correct IP address but gives no response to any pings, dont telnet on port 80 (or any toher potr for that matter) on any machine on the internet. I checked the settings using ifconfig to see what DHCP had assigned, and they matched the windows machines configuration (other than the IP address obvisouly). I tried assigning a static IP, even reserving a particular IP for my NIC.
Whatever I do, i cant connect to any machine outside the network via IP or domain.I have searched everywhere and tried everything i can find on the net but still to no avail.The Windows machines are part of a domain called alcom-uk.local and run off of a Windows Small Business 2003 Server. Not sure if i need to manually setup Ubuntu to connect using a domain or anything.
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Jan 21, 2010
I know this is not a win-doze forum but i always ask my questions here so here goes.I am having what appears to be a DNS problem on a friends laptop. He is running windows XP. I CAN connect to networks and even ping websites but i CANNOT browse in Internet Explorer or FIrefox.
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Aug 8, 2010
I have 2 10.04 computers and one win 7 and one vista computer: The win computers can see each other and the ubuntu computers, but the ubuntu computers cannot see each other or the win machines. The ubuntu computers connect to the internet fine and can ping each other. I cannot find settings to correct.
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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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Aug 29, 2010
I just installed open Suse 11.3, and I cannot SSH my school. Upon further investigation I could not even ping any machines outside my local area network. Ironically I could nmap machines outside my local area network.
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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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Oct 27, 2010
Windows 2008 R2 Enterprise Edition, hyper-v install Windows 2003 R2 for normal Internet use.hyper-v no Internet access after installing ubuntu10.10 64bit is the use of the legacy network adapter, whether or static MAC address and MAC address spoofing is not the Internet,ubuntu network card settings should be no problem.?
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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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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.
[Code]....
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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:
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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