Ubuntu :: Cisco VPN - Cannot Ping Computers On Remote Network
May 21, 2010
I go to system > preferences > network connections in 9.10 and import a profile. The vpn seems to connect but I cannot ping computers on the remote network. When I attempt to ping, it seems it can see an ip (DNS must be working) but I can't actually ping the machine or rdp in. I've disabled my firewall and rebooted and that didn't help. What can I do?
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Jul 8, 2011
I have just installed Ubuntu 11.04 and the Cisco VPN client with :
apt-get install network-manager-vpnc
I have imported the PCF provided by my employer into the GUI. The group password also seems ok, when I login to the VPN server, I am provided with the "VPN Login message". (On Windoze, I get an Ok/Cancel popup with the same message). In Ubuntu, I don't get to click "Ok" but it looks like I'm connected properly. The /var/log/syslog file contains numerous static routes added, 30 or so. After the Login Message, I see the couple of line:
Jul 8 12:40:51 ubuntu02 vpnc[1613]: can't open pidfile /var/run/vpnc/pid for writing
Jul 8 12:40:52 ubuntu02 NetworkManager[630]: <info> VPN connection 'VPN to my network' (IP Config Get) complete.
I get an IP from the external network correctly as well:
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:172.16.10.170 P-t-P:172.16.10.170 Mask:255.255.255.0
However, I cannot ping any of the machine on the remote network. None of the network services seems to be accessible. Why the machines on the VPN are not accessible?
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Apr 15, 2011
I have installed Micro Core onto a usb of mine and am running it on my laptop. I have been able to successfully obtain a connection and valid ip with my router. As you can see below my wireless connection seems valid computer-end and on my router's page it comes under the list of attached devices.Although this is all fine and dandy, I'm am unable to ping my router or any other computer on my network, I am also unable to ping my laptop from other computers on the network. Also by the looks of it I have having no trouble transmitting, but I am not receiving any packets.
[Code]...
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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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May 8, 2011
I have two network interface eth0 and eth1 eth0 is on 192.168.0/24 network connected to the internet eth1 is on 10.10.10/24 network and DHCP for this network the clients connected to this interface can not connect to the internet but they can ping 192.168.0.4 which is the eth0 ip but can not ping 192.168.0.1 cisco router or anything else on 192.168.0/24 I have tried few tricks but still not working
1) iptables -t nat -A POSTROUTING -s 10.10.10.0/24 -o eth0 j SNAT --to 192.168.0.4/24 it did not work
2) iptables -t nat -A POSTROUTING -o eth1 -j SNAT --to 192.168.0.4 did not work as well
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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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Jan 31, 2011
im trying to connect two computers on lan.One computer has: VMWare Workstation and has Opensuse 11.3 mounted in it.The other computer has: VMWare Player and has Opensuse 11.3 mounted in it.Both computers are connected to a switch with cables.I have followed this guide in both computers:Depanati singuri calculatorul!: Opensuse 11.3 - configure local networkin order to setup a network.In one computer, if i go to: Computer---Network---Network folder, i only see one machine. When in fact i could see both of them right
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May 24, 2011
I have two computers running centos 5.5 that have ip addresses in two different networks.(They were in the same network (192.168.1.0/24)and I changed IP address of one to 10.0.0.0/8).
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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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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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Jun 2, 2009
I recently built my second general-purpose server, and recently installed fedora core 10 on it. The first thing I attempted to set up after installation was the network - and that's where it's gone wrong When editing a network device using the graphical system-config-network utility, I find that the subnet mask is being automatically changed to match the default gateway address every time I attempt to modify any of its settings (or sometimes even when I cancel the changes). This also means that I cannot set the subnet mask, as it simply won't accept my setting for it. I seem to be able to get around this glitch by setting the subnet mask using the shell version of the same utility, but that doesn't solve my network issue.
Even when I use the shell utility to fix the subnet mask, I'm unable to ping other computers or routers on the network even when ifconfig indicates that the desired ip address has been taken, and other computers on the network are also unable to see the server. I'm using a wired connection and a static IP address on a network with no DHCP.
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Apr 13, 2010
I would like to set up a remote desktop connection between two computers over the Internet. I already tested remote desktop within a local network but it's far from secure enough this time. I will try to follow this guide [URL] (ssh portforward and internet). This still leaves ufw and how it should be configured. Let's say I have this setup, server computer has ip 12.341.245.124 and the client has 78.12.543.234 how should ufw be configured to be secure? This remote desktop wont be connected to a local network
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Feb 1, 2011
I followed [URL] to install and use Cisco VPN to connect to my office network. After importing the .pcf file, I am able to connect without any issues. However, once the connection is established, I am not able to either browse the internet or open any intranet sites. If I do ifconfig, I do not get a office IP however the tunnel IP shows up correctly. I am not sure what the issue is.
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Jul 28, 2010
iam trying to scp files between two remote computers, i get the following error:
Host key verification failed.
lost connection
What i am trying to do is : scp u1@ip1:/source_path u2@op2:/destination_path
I am able to ssh into both machines fine, so i know that works. I tried google for this but couldn't make much of the results.
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May 22, 2010
Alright so i just wanted to try and get remote desktop connections running so i can access files on the other computers in my house. For my first try i went after my laptop. I'm using rdesktop.
First couple times i tried i typed in
Code:
After about 15 seconds it would pop back with
Code:
I realized that my laptop's firewall was blocking the packets, so i created a custom rule that allows all TCP packets on port 3389. So i fired up rdesktop again. Now it pops back with:
Code:
But instantaneously, not after 15 seconds (not sure if thats significant or not.) I checked my firewall's log and it allowed the tcp packets.
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Jun 25, 2011
I want to be able to synchronise files between 2 remote computers in both directions. Say for example that I want to synchronize my /home/Documents directory with <username>@example.com:/home/Documents What's the easiest way to update the folders in both directions, so that new/updated files on my home computer get transferred to the remote computer, and new/updated files on the remote computer get transferred to my home computer?
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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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Dec 19, 2009
I just installed a fresh copy of 11.2 I use networkmanager and the cisco vpn plugin (not the cisco client). I create a vpn profile and connect to it. The icon shows a connection has been established, but I have no network connectivity. In the /var/log/NetworkManager file, I see this
Code:
Dec 19 13:28:08 TonyLaptop nm-dispatcher.action: Script '/etc/NetworkManager/dispatcher.d/netcontrol_services' exited with error status 127.
When I sudo vpnc and connect that way, it works fine, it connects and I can pass traffic.
I am using opensuse 11.2x86
firewall is disabled
Gnome
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Aug 10, 2010
I have a new install of an OpenSuse 11.3 server and I do not see the IPSec Support option when I use Yast to set that I up. I have the firewall setup with 2 interfaces, one external and one internal and that is all working fine. When I connect via my laptop and connect in via a Cisco IPSec VPN, I get connected, but no traffic goes through.
I did search through the forums, but I don't see any hits related to the issue I'm facing. I installed the ipsec-tools, but I am still not seeing the IPSec Support in the firewall section of Yast that I see noted on many Google Searches. Is there a package or something configuration that is needed to get IPSec Support for VPN setup?
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Sep 7, 2010
I am trying to compile the Cisco vpnclient on my Opensuse 11.2 and (after some troubles) I got the module compiled and installed but when I try to load with insmod I got this error
<</etc/init.d/vpnclient_init start
Starting /opt/cisco-vpnclient/bin/vpnclient: insmod: error inserting '/lib/modules/2.6.31.12-0.2-default/CiscoVPN/cisco_ipsec.ko': -1 Invalid module format
Failed (insmod)>>
I am able to use the vpnclient forcing the module with modprobe -f cisco_ipsec but I'd prefer to solve the 'invalid format' original problem. I 'googled' around and it seems related with this warning during vpn_install script "WARNING: Symbol version dump /usr/src/linux-2.6.31.12-0.2/Module.symvers is missing; modules will have no dependencies and modversions." I have these rmps:........
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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 13, 2011
Q=What will this do?
A=This will read from /root/Desktop/iplist (or anywhere you want to put the list) after it reads the ip it will ping the ip two times. If the remote host is up then it will write the ip to a log. If the ping fails it will display it on the screen, write the ip to syslog so that you can do remote logging, and last it will send the ip by email to a user or a group of users.
Code:
#!/bin/bash
#wrote by Zach Underwood feb-12-2011
#test and wrote on centos 5.5 with sendmail
rm -f /root/Desktop/iplog #This will remove the good iplog
exec 9</root/Desktop/iplist #put full path the file where ip list is. Make sure that the ips are listed one per line.
while read -u9 ip
do
ping -c 2 $ip > /dev/null 2> /dev/null # ping and discard output
if [ $? -eq 0 ]; then # check the exit code
echo "$ip is up" >> /root/Desktop/iplog #write the ip of the hosts that are up
else
echo "$ip is down" # will show on the screen the ips that are not up
logger -p auth.notice "$ip is down" # will write the down host to syslog
echo "$ip is down" | mail -v -s alert user@anydomain.com > /dev/null 2> /dev/null #will send mail users about host down
fi
done
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Dec 21, 2010
Some time yesterday, I lost the ability to ssh my remote server, or even visit any webpages it hosts.
I've explored hosts.deny, /var/log/secure and even turned iptables off to see if it would fix anything. To no avail. Here's what my ssh login attempt looks like:
Quote:
localhost ~ $ ssh -vv x.x.x.x
OpenSSH_5.2p1, OpenSSL 0.9.8l 5 Nov 2009
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
[Code]....
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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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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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Aug 8, 2010
if there is a way to determine the external ip of other computers on a network. For example, if someone is sending malicious emails and you identify the ip that sent the email by looking at the original, is there a way from the terminal to figure out which computer on your network it was?
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Apr 30, 2011
I just replace my Ubuntu 10.10 with the last one 11.04. I have a NAS and other windows computer that I used to share files with, but with the new Unity interface I don't know how to do it.
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Oct 2, 2010
When I try to use Nautilus to connect to another computer on my network, and I attempt to connect using the name of the Windows XP computer I am connecting to, I get the following error; Could not display "smb://computername/". Error: Failed to retrieve share list from server Please select another viewer and try again. However when I attempt to connect using the IP address on the network, it connects instantly. smb://192.168.1.101/ Why doesn't it connect using the computer's name? What am I doing wrong?
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Nov 22, 2010
Does anyone know of an app that I can use to view all the computers connected to my network and the IP addresses to those computers?
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Jun 5, 2011
in windows you do i think ipconfig and it shows all computers on the network and their ip's including yours , how to do that in ubuntu ? well i just want to see other computers and their ip's including their names ( in windows for names you use net view)
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