Red Hat :: Can't Ping Gateway / Even With Correct Network Settings
Jan 6, 2009
Set up new server using RH 2.6.9-42.ELsmp on an old HP G4 server. But can't get network to work, can't ping any host, not even my gateway.
Verified cable by plugin a different pc on it, using same network ip address, etc, it worked fine, could ping gateway and other hosts on same segment. Are there any other files I could check to verify network card on server is good? it was working when it was configured as a windows server.
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Jul 17, 2011
I installed openSUSE on one of my work system. The network port wasn't working when I was installing, but works fine now (checked in Windows). But for some reason, I am not able to configure the network. I used both Dynamic and Static IPs (both work fine in Windows) but still no go. I am using Yast Control Center for this purpose. I can't even ping the default gateway when I am using custom settings. When I use dynamic settings, it says Unreachable Network.
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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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Dec 16, 2010
I have a laptop running OpenSuSE 11.2. I use the Yast menu to set up network settings via "traditional" ifconfig setup (not NetworkManager), because I found NM unusable in prior releases when doing network gymnastics such as router re-flashing, LAN reconfiguration, etc. where I needed control of the IP address, netmask, DHCP, tftp, etc. My laptop works fine with Yast "traditional" ifconfig configuration for eth0 connected to router to Internet. Works fine with Yast ifconfig configuration for USB WiFi as wlan1 to WiFi router to Internet. Also works fine for virtual machines on vmnets NAT-ed to the Internet. Works fine as long as there is only one network connection, that is.
Now, I have a second laptop. I want to network laptop #2 eth0 to laptop #1 eth0 for file transfer and/or Internet access WHILE laptop #1 is is linked to the Internet through wlan1. Unfortunately, I have not figured out how to get Yast/Network Configuration to do that. I have not been able to get Yast/Network Configuration to see both wlan1 and eth0 at the same time--when the Yast utility finishes, I do >ifconfig and >route, and I find that I have lost either eth0 or wlan1. Thus, when I do direct-connect file transfers, I loose the WiFi Internet connection on both machines.
I suspect that it might have something to do with Yast/Network Configuration utility not being able to handle two network interfaces on the host with different IP addresses. how to properly put an OpenSuSE machine on two networks simultaneously? And then how to turn on IP forwarding so that I can use laptop #1's WiFi as an Internet gateway for laptop #2?
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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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Dec 10, 2010
When I try wget URL... I get failed: connection timed out.I have created br0 as a bridge over eth0 to run this VM. The host has this IP 172.30.8.135.The host has access to internet through eth0 and this is the output of route inside the host.
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Feb 12, 2011
I can ping my IP, and other PC in the same LAN, but I CANNOT ping the gateway on my 10.04LTS ubuntu. Other PC in the same LAN(Ubuntu 10.04LTS) could ping the gateway and my IP. I thought that (1)network cable is OK because I could ping the other PC in the same LAN.(2)Gateway is OK because other PC could ping it. (3)setting of operating system might be somehow wrong.
I have tried to restart the network several times and still not works. I followed the HOW-To debug tips and following is the results. Any suggestions?
1. ifconfig
eth2 Link encap:Ethernet HWaddr 00:1d:7d:aa:d5:d3
inet addr:140.112.61.75 Bcast:140.112.61.255 Mask:255.255.255.0
inet6 addr: fe80::21d:7dff:feaa:d5d3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
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Mar 8, 2010
My problem is simple, iam runing ubuntu 8.04 (ebox 1.4) , i have installed and configured PPTPD server, i can connect and ping users perfectly. BUT i dont getting any gateway address, in my case i have to get IP address 172.16.0.1 (PPTP server address).I tried to change localIP in pptpd.conf to 0.0.0.0 ,or my remote(ISP) address but nothing.Can someone explain to me how can i manually assign gateway IP address to PPTPD Server ???
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May 6, 2010
I am accessing internet through Analog Proxy. ADSL modem has been connect to one of windows xp machine and by running Analog proxy, we uses internet by mentioning that machine's ip address. But how do i ping the default gateway in this case? Is it possible or not? If yes then please tell me how, because if i says # ping <anysite.com> it not pinging; its says host unreachable; means i will not be able to run wget too.
I am trying to ping from OEL 5.3. In one of google link; i read that :Does PING work through the Proxy Server? No, ping uses the ICMP protocol to communicate. Proxy only supports TCP and UDP packets. Ping will resolve the DNS name but go no further.
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Feb 23, 2010
I have installed ubuntu 9.04 Jaunty server from disk. I am connect to my corporate internet. I have put in my http_proxy everywhere I can find to put it. I am getting an ipaddress, gateway, broadcast,etc. My wired is connected. When I try to ping my default gateway it times out. %100 packet loss. I get the ipaddress of the gateway from the (route command).
My configurations on /etc/network/interfaces is correct(I am on another computer so I can't copy and paste) and I even tried updating the drivers for NIC card. I am using a Intel 82567LM-3. I have been working on this longer than I care to admit.
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Jun 14, 2011
I have configured bonding on 64 bit centos 5.4 I have to put the machine to a different VLAN for that i did the Ip change and restated the network. but i cant ping the gateway or any other server in that network. the cofig files are as follows
vi /etc/modprobe.conf
alias eth0 bnx2
alias eth1 bnx2
alias scsi_hostadapter aacraid
alias scsi_hostadapter1 ata_piix
alias usb-controller ehci-hcd
alias usb-controller1 uhci-hcd
alias bond0 bonding
options bonding mode=1 miimon=100
[Code].....
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Oct 25, 2010
When using gateway 196.214.15.X with ip 192.168.1.X all windows pc connect to internet and email but using the same range on rhel5 it cant even ping mailbox. Why is the ip masked, can u get software to trace the ip of the gateway from the windows pc, the 196 ip is I suppose a public ip as it is the ip of my lease line? How do I get the RHEL5 running internet using the same range as the windows boxes ??
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Jul 2, 2010
I posted it on another forum, but could not get response,So I have this cenOS, Ubuntu and windows operating system running on virtual machines.Now I gave them manual ip address, both ubuntu and windows machines can ping the default gateway, but not the CentOS.It should forward 0.0.0.0. to my cisco router address(192.168.5.254),
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Jan 22, 2009
Presently this client access the net through following setup
ADSL modem -> hub -> all computers
Now they want to do some kind of bandwidth control, content filtering. So I tried setting up squid with dansguardian. This is what I did
ADSL -> linux server -> all computers.
The linux server has two NIC cards. One to the ADSL router and another to the local hub. This is how my squid.conf file looks like
http_port 3128
acl ubc src 192.168.1.0/255.255.255.0 (for subnet)
http_access allow ubc
Have set the gateway server as 121.x.x.1. Which is the gateway server of the ISP. Now I can ping the local network, but cant ping the gateway or any other website. Also I am unable to access the router administration page.
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May 26, 2010
I've set a two-node cluster using Pacemaker/OpenAIS. I have only one network and if I break this one, the communication between node is interrupted ... With a ClusterIP resource, when network is breaked, then each node start the ClusterIP => 2 same IP .. Is there a way to define the prefered location of a resource when connection between these nodes is broken ?
A <==> B
If one of the node lose the network, then follow a previously written rule : start resource on A (for example). B will know than it's not the prefered node and so, will stop to serve. Possible ? This is because if both node are connected, but a problem between these node occur and client can join both node ... then the split brain is problematic ... A better solution is to add a rule when the split-brain occurs : all node wich can't reach the gateway have to stop all resources ... And so, if it's A wich lose the network, service will start on B and only B without any problem ...
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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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Jul 17, 2010
I have some DVD's that I've saved to my comp as an ISO, in Ubuntu they would play fine in Movie Player or VLC, but I've just tried to play one on Debain Lenny and I have the following issues.
Movie Player:
Will play the video but wont bring up the main menu so that I can select which episode that I want. It won't even skip to the next one, it just starts playing the first.
VLC:
So I then though I'd down the trusted ol' VLC. VLC brings up the main menu but I can't select any thing. It just sits there and playing the menu screen for a bit and my mouse clicks seem to have know effect (except double clicking to change to full screen). Then it starts playing the first one, if I try to skip it goes back to the main menu and starts all over again.
This particular issue I sometimes had in Ubuntu with Movie Player (depending on the ISO) but VLC would still play it fine.
Update:
Just got VLC to run the menu correctly by doing the following:
File => Open Capture Device => File Tab => Browse to the file, select it. => Click OK.
I don't really want to have to do this every time I want to watch a video. Does any one know of a setting that will do this when ever I click on the ISO to play it?
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May 31, 2011
I'm using Fedora 15. For some reason, my computer is booting up graphically. I do not have video drivers for a graphical setup apparently now that Gnome is getting more advanced, so I really need to restore to a CLI. I see /etc/inittab is now deprecated thanks to systemd. The instructions say the following:
Code:
# Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target
# systemd uses 'targets' instead of runlevels. By default, there are two main targets:
# multi-user.target: analogous to runlevel 3
# graphical.target: analogous to runlevel 5
To set a default target, run:
# ln -s /lib/systemd/system/<target name>.target /etc/systemd/system/default.target
And that's exactly what I have set up!
Code:
[root@server system]# pwd
/etc/systemd/system
[root@server system]# ls -la
total 20
lrwxrwxrwx 1 root root 37
May 31 10:41 default.target -> /lib/systemd/system/multi-user.target
Why is this machine starting up graphically? I even removed the symlink and recreated it... but that obviously isn't the issue here.
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Oct 7, 2009
I have tried all the ways possible by changing settings in BIOS, changed the ROM, even the hard disk but nothing worked to install red hat 5 in my system. I tried to install in my laptop and it was done but not in my desktop. I m using HP dc7900 convertible minitower.
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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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Oct 22, 2010
Back in April I set up a Ubuntu DHCP server and a multiple VLAN network [URL] to migrate our various servers, workstations, etc off the 192.168.1.1 /24 network that everything was on because we where running out of address space. I built out the new network and everything worked great except our AD server would never get an IP address from the DHCP server (static reservation) and even if I set the IP statically on the AD server it couldn't ping the gateway and noone could log in. After several attempts to resolve this, including bringing in outside help, we where never able to figure out what the problem was.
Now 6 months later I have time to revisit the issue without effecting the live network. I used Acronis and imaged the AD server last Friday, cloned it on to another box with the same hardware, and put it up on the new network that's been sitting unused for the last 6 months. Today when I statically set the IP on the AD server (which is what I want) it connects and I can ping it's gateway 192.168.1.1 and all the way across vlans to a test sales agent workstation at 192.168.8.xxx on vlan 800 but only if I statically assign the agents station an IP address. When I try to get an IP address via DHCP it fails as destination unreachable. Nothing has changed in the last 6 months on the DHCP server but now it for some reason can't ping its default gateway 192.168.1.1. All of the config files are the same as they where left from the post linked above aside from the vlan id's used where changed from 1's to 100's (i.e. vlan 3 is now vlan 300) /etc/network/interfaces
Code:
auto lo
iface lo inet loopback
auto vlan100
iface vlan100 inet static
[code]....
why it can't reach the gateway, when I do a tcpdump I can see the DHCP requests come in on eth0 but the server never responds and I'm pretty sure its because it isn't "seeing" them since it thinks there isn't a network connection but I don't know how to trouble shoot to find out where the problem lies.
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Jul 1, 2010
Back in April I set up a Ubuntu DHCP server and a multiple VLAN network [URL] to migrate our various servers, workstations, etc off the 192.168.1.1 /24 network that everything was on because we where running out of address space. I built out the new network and everything worked great except our AD server would never get an IP address from the DHCP server (static reservation) and even if I set the IP statically on the AD server it couldn't ping the gateway and noone could log in. After several attempts to resolve this, including bringing in outside help, we where never able to figure out what the problem was.
Now 6 months later I have time to revisit the issue without effecting the live network. I used Acronis and imaged the AD server last Friday, cloned it on to another box with the same hardware, and put it up on the new network that's been sitting unused for the last 6 months. Today when I statically set the IP on the AD server (which is what I want) it connects and I can ping it's gateway 192.168.1.1 and all the way across vlans to a test sales agent workstation at 192.168.8.xxx on vlan 800 but only if I statically assign the agents station an IP address.
When I try to get an IP address via DHCP it fails as destination unreachable. Nothing has changed in the last 6 months on the DHCP server but now it for some reason can't ping its default gateway 192.168.1.1. All of the config files are the same as they where left from the post linked above aside from the vlan id's used where changed from 1's to 100's (i.e. vlan 3 is now vlan 300) /etc/network/interfaces
Code:
auto lo
iface lo inet loopback
auto vlan100
[code]....
why it can't reach the gateway, when I do a tcpdump I can see the DHCP requests come in on eth0 but the server never responds and I'm pretty sure its because it isn't "seeing" them since it thinks there isn't a network connection but I don't know how to trouble shoot to find out where the problem lies.
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Sep 5, 2010
I installed avant-window-navigator and followed these instructions to remove gnome-panel from startup: URL...However I have since uninstalled AWN and now cannot get gnome-panel to load at startup.I think I have put my settings back where they should be -- looking at them in gconf-editor:
1. desktop > gnome > session, the required_components_list is [windowmanager,filemanager,panel]
2. desktop > gnome > session > required_components_list, the panel value is "gnome-panel"
Yet gnome-panel does not load at startup. Any ideas why?Clarification: I can get gnome-panel to load by listing it under Startup Applications, but I am curious why it won't load via the gconf settings.
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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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Jul 25, 2010
When I run:
# Ping 127.0.0.1
Returns nothing. As if expecting an answer that never comes. Then press Ctr + C and returns:
--- 127.0.0.1 ping statistics ---
117 Transmitted packets, 0 received, 100% packet loss, time 116009ms
I use 3g modem connection configured with the command:
# pppsetup
The internet connection is normal. But without the ping localhost also can not open the settings for CUPS.
Here is my /etc/resolv.conf (if it helps in something):
google.com search
nameserver 8.8.8.8
nameserver 8.8.4.
code....
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Feb 26, 2010
I have openSUSE 11.2 installed and i need to create a gateway server that allows virtual private network connections. I want to play with my friends some lan games, but we are in different networks, so i want to create this gateway server so we can connect with VPN clients to this server and play freely.
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Jul 15, 2010
Why trying to avoid ranting about my Linksys router, I'll try and keep things short. I have a Linksys router in which the default firmware was terrible and would not correctly renew its DHCP lease. After getting feed up with that I flashed dd-wrt on the router and now it works better but randomly DNS queries would stop being resolved. To rule out the chances that it is my ISPs DNS servers I switched my DNS to openDNS, same problem happens (although I have to admit openDNS is a lot better than what my ISP has).
Anyways I'm about feed up with it and about an inch away from drop kicking the thing out my window. To avoid that I figured I will give it one more change and instead of using my Linksys as my network gateway I'll move all of that to my home server, and make the Linksys just an wireless AP. Besides setting up DHCP, DNS, and iptables on the server is there anything else I will need to know and setup on the server to make this work?
Side note anyone using openSUSE for DHCP know if setting up reserved IPs for certain MAC address is possible?
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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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Feb 13, 2011
I'm new to SuSe and lateley I was trying to establish a Network, when some weired problems occured. I was able to establish the network and i have connection to the internet. The suse-machine is rechable by ping from all the other computers in the network. If I'm tryiing to ping the other computers from the suse-machine, nothing happens. The router responds without packet loss, but every other ping occurs in:
From 192.168.2.6: icmp_seq=2 Destination Host Unreachable
From 192.168.2.6: icmp_seq=3 Destination Host Unreachable
From 192.168.2.6: icmp_seq=4 Destination Host Unreachable
From 192.168.2.6: icmp_seq=5 Destination Host Unreachable
I've been searching for some ideas to solve this problem but couldn't find any.
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Oct 29, 2010
I am using Centos 5. I got one error unexpectedly after some configuration for rsync and folder settings. The error i am getting is "Serve Authorization directory (daemon/ServAuthDir) is set to /var/gdm but does not exist. Please correct the configuration and restart GDM." after rebooting.
I tried to resolve the issue by setting permission for folder /var/gdm to 755. but the problem is still not resolved.
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