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I am trying to get Ubuntu version 14.04.1 running on a Windows 7 64 bit system. The Oracle VirtualBox is version 5.0.12r104815.

From a terminal window in Ubuntu I am able to ping google.com and other addresses. But I cannot get the system to update or install other software.

I have the default horrible 640x480 resolution which I cannot change and want to install the tools to change the resolution.

sudo apt-get install virtualbox-guest-dkms virtualbox-guest-x11

I get an instant response:

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package virtualbox-guest-dkms
E: Unable to locate package virtualbox-guest-x11

When I try to run an update:

sudo apt-get update

The response is a continuous:

0% [Connecting to gb.archive.ubuntu.com (91.189.92.201...

I can't open google.com in firefox either, yet I can ping google.com

I have setup the system with the correct company DNS address. All the host names and addresses will ping ok, but I can't get any data response back to the system. I suspect it is a firewall problem. The companies IT dept has experience in Windows only, what ports do I need to ensure are opened?

SPlatten
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2 Answers2

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first check if gateway is setup correctly 

#route

check the gateway if not ok then

#route delete default gw (your gateway ip)

#route add default gw (your gateway ip)

then

do a

DNS

-A INPUT -p tcp -m tcp --sport 53 -j ACCEPT
-A INPUT -p udp -m udp --sport 53 -j ACCEPT

apt-get

-A INPUT -p tcp --sport 80 -j ACCEPT
Shantanu Bedajna
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  • I'm not really sure how to read the results to see if it is working correctly or not. – SPlatten Jan 12 '16 at 15:47
  • ok , you can ping out of the network so the gateway is working ok, can you resolve names ? if not then have to fix dns , if your using nat which i don't recomend it should , nat should work out of the box. I recomend using the ubuntu vm as briged adapter and give apropriate ip with dhcp or manually ,then add 208.67.222.222(opendns server) in /etc/resolv.conf or add it in /etc/network/interfaces, then if still cant get-http forwaord the ports as i said with iptables command ,then let me know – Shantanu Bedajna Jan 12 '16 at 15:56
  • I can ping the IP's and I can ping the name's which then resolve to an IP address, but I cannot use either in a browser. I did notice that the Gateway IP address isn't correct, however when I tried to change it with "route add" I got "Network is unreachable". – SPlatten Jan 12 '16 at 16:09
  • of course cause its using nat, i know you have your reaons to use nat but i would suggest using the ubuntu vm as a briged adapter ,that way it will be easier to troubleshoot – Shantanu Bedajna Jan 12 '16 at 16:12
  • With the adapter set to "Bridged Adapter" the network icon in the top line just spins continuously then I get a message informing me that the Network is disconnected. – SPlatten Jan 12 '16 at 16:16
  • #service network-manager stop

    #ifconfig eth0 up

    #dhclient -r eth0 && dhclient eth0

     – Shantanu Bedajna Jan 12 '16 at 16:19
  • use these commands this stops network manager and gives eth0 a ip address from dhcp if you dont have a dhcp server setup in your local network then do it manually – Shantanu Bedajna Jan 12 '16 at 16:20
  • #ifconfig eth0 192.168.0.53/24 (your ip which does not conflicts with other hosts on your local network) #route add default gw 192.168.0.1(your local gateway) #echo "nameserver 208.67.222.222" > /etc/resolv.conf – Shantanu Bedajna Jan 12 '16 at 16:22
  • also read this link about your nat problem just fr info http://ubuntuforums.org/archive/index.php/t-1786307.html – Shantanu Bedajna Jan 12 '16 at 16:24
  • Settings, IPv4, IP Address 10.1.1.138, Broadcast address: 10.1.255.255, Subnet Mask: 255.255.0.0, Default Route: 10.1.0.242, Primary DNS: 10.1.0.241, Secondary DNS: 8.8.8.8, Ternary DNS: 8.8.4.4 – SPlatten Jan 12 '16 at 16:39
  • last tip from me disable ufw completely

    #sudo ufw disable

    hope you get it working ,maybe someone more experienced shall answer ,sorry i wasn't any help

     – Shantanu Bedajna Jan 12 '16 at 16:48
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In the end I believe the problem was related to our firewall, I set-up a proxy and everything now works, the information came from this post:

proxy settings don't help with update manager

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SPlatten
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