Ubuntu:Feisty ja/Networking

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Networking

How to configure Google Talk

Configure for Pidgin/Gaim

How to activate/deactivate network connections

  • Read #General Notes
  • System -> Administration -> Network
  • Network settings
Connections Tab -> Select "Ethernet connection" -> Activate/Deactivate

Note: in Feisty, the network names have changed. Instead of "Ethernet connection", you may have "Wireless connection", "Wired connection" and "Modem connection". Also, they don't have an Activate/Deactivate option. Instead, go to "Properties", and activate or deactivate from there.

How to configure network connections

  • Read #General Notes
  • System -> Administration -> Networking
  • Network settings
Connections Tab -> Select "Ethernet connection" -> Properties
Connection -> Enable this connection (Checked)
Connection Settings -> Configuration: Select "DHCP/Static IP address"
DNS Tab -> DNS Servers -> Add/Delete

How to configure dialup connections

sudo pppconfig
  • To connect dialup
pon provider_name
  • To disconnect dialup
poff

How to configure broadband connections

sudo pppoeconf

How to change computer name

  • Read #General Notes
  • System -> Administration -> Networking
  • Network settings
General Tab -> Host Settings -> Hostname: Specify the computer name 
  • Save and close all opened applications, Reboot computer

How to change computer descriptions

sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup
gksudo gedit /etc/samba/smb.conf
  • Find this line
...
  server string = %h server (Samba, Ubuntu)
...
  • Replace with the following line
  server string = new_computer_descriptions
  • Save the edited file
sudo testparm
sudo /etc/init.d/samba restart

How to change computer Domain/Workgroup

sudo cp /etc/samba/smb.conf /etc/samba/smb.conf_backup
sudo gedit /etc/samba/smb.conf
  • Find this line
...
  workgroup = MSHOME
...
  • Replace with the following line
  workgroup = new_domain_or_workgroup
  • Save the edited file
sudo testparm
sudo /etc/init.d/samba restart

How to assign Hostname to local machine with dynamic IP using free DynDNS service

sudo apt-get install ipcheck
gksudo gedit /etc/ppp/ip-up.d/dyndns_update
  • Insert the following lines into the new file, replacing "myusername" and "mypassword" with your unique username and password.
 #!/bin/sh

 USERNAME=myusername
 PASSWORD=mypassword
 HOSTNAME=myhostname.dyndns.org

 cd /root/
 if [ -f /root/ipcheck.dat ]; then
  ipcheck -r checkip.dyndns.org:8245 $USERNAME $PASSWORD $HOSTNAME
 else
  ipcheck --makedat -r checkip.dyndns.org:8245 $USERNAME $PASSWORD $HOSTNAME
 fi
  • Save the edited file
sudo chmod 700 /etc/ppp/ip-up.d/dyndns_update
sudo sh /etc/ppp/ip-up.d/dyndns_update

How to share folders the easy way

Right click on folder -> Share folder
Shared folder -> Share with: Select "SMB"
Share properties -> Name: Specify the share name

How to browse network computers

e.g. Assumed that network connections have been configured properly
If computers or network folders could not be found, try access them directly
Read #How to access network folders without mounting
  • Places -> Network Servers

How to access network folders without mounting

e.g. Assumed that network connections have been configured properly
Network computer's IP: 192.168.0.1
Shared folder's name: linux
  • Press 'Alt+F2' (Run Application...) and enter:
smb://192.168.0.1/linux

How to mount/unmount network folders manually, and allow all users to read

e.g. Assumed that network connections have been configured properly
Network computer's IP: 192.168.0.1
Network computer's Username: myusername
Network computer's Password: mypassword
Shared folder's name: linux
Local mount folder: /media/sharename
  • To mount network folder
sudo mkdir /media/sharename
sudo mount //192.168.0.1/linux /media/sharename/ -o username=myusername,password=mypassword
  • To unmount network folder
sudo umount /media/sharename/

How to mount/unmount network folders manually, and allow all users to read/write

e.g. Assumed that network connections have been configured properly
Network computer's IP: 192.168.0.1
Network computer's Username: myusername
Network computer's Password: mypassword
Shared folder's name: linux
Local mount folder: /media/sharename
  • To mount network folder
sudo mkdir /media/sharename
sudo mount //192.168.0.1/linux /media/sharename/ -o username=myusername,password=mypassword,dmask=777,fmask=777
  • To unmount network folder
sudo umount /media/sharename/

How to mount network folders on boot-up, and allow all users to read

e.g. Assumed that network connections have been configured properly
Network computer's IP: 192.168.0.1
Network computer's Username: myusername
Network computer's Password: mypassword
Shared folder's name: linux
Local mount folder: /media/sharename
sudo mkdir /media/sharename
gksudo gedit /root/.smbcredentials
  • If you do not have smbfs installed yet, install that first:
apt-get install smbfs
  • Insert the following lines into the new file
username=myusername
password=mypassword 
  • Save the edited file
sudo chmod 700 /root/.smbcredentials
sudo cp /etc/fstab /etc/fstab_backup
gksudo gedit /etc/fstab
  • Append the following line at the end of file
//192.168.0.1/linux    /media/sharename smbfs  credentials=/root/.smbcredentials    0    0

How to mount network folders on boot-up, and allow all users to read/write

e.g. Assumed that network connections have been configured properly
Network computer's IP: 192.168.0.1
Network computer's Username: myusername
Network computer's Password: mypassword
Shared folder's name: linux
Local mount folder: /media/sharename
sudo mkdir /media/sharename
gksudo gedit /root/.smbcredentials
  • Insert the following lines into the new file
username=myusername
password=mypassword
  • Save the edited file
sudo chmod 700 /root/.smbcredentials
sudo cp /etc/fstab /etc/fstab_backup
gksudo gedit /etc/fstab
  • Append the following line at the end of file
//192.168.0.1/linux    /media/sharename smbfs  credentials=/root/.smbcredentials,dmask=777,fmask=777  0    0

How to get ipw2200 and WPA to work

Under Feisty, WPA works right out of the box with network manager.

How to get ipw3945 and wep/wpa to work

Under Feisty, the driver for Intels ipw3945 is loaded by default, no configuration is needed.

How to get Broadcom BCM4318 wireless card to work

Under Feisty, do:

sudo apt-get install BCM43xx-fwcutter

Allow the driver to be downloaded.

How to Configure and start PPTP tunnels (VPN)

You can use NetworkManager which comes with Feisty.

  • Configure VPN with Network Manager

In a terminal

sudo apt-get install network-manager-pptp

You have to restart after install.

To setup a VPN Click the NetworkManager Icon in the tray VPN Connections->Configure VPN Use the defaults and be sure to check the box: Refuse EAP under the Authentication tab. To get my connection to work I also had to check Require MPPE Encryption under Compression & Encryption

Alternative programs listed below

OR
  • Install manually
wget -c http://linux.edu.lv/uploads/content/pptp.tar.gz
tar zxvf pptp.tar.gz
cd ./pptp/
sudo sh install
cd ..
  • To configure PPTP Client
gksudo gedit /usr/share/applications/pptpconfig.desktop
  • Replace content of this file with the following lines
[Desktop Entry]
Name=PPTP Client
Comment=Configure and start PPTP tunnels (VPN)
Categories=Application;Network
Encoding=UTF-8
Exec=gksudo pptpconfig
Icon=gnome-remote-desktop.png
StartupNotify=true
Terminal=false
Type=Application
  • The above lines change the default file in three ways: the application is placed in the Application/Internet category, gksudo will make the application run as superuser and we put a nice icon that appears in the menu.
  • Start the client with Applications -> Internet -> PPTP Client

How to setup a GPG key with Seahorse and Evolution

apt-get install seahorse
  • Applications > Accessories > Passwords and Encryption Keys
  • Key > Create New Key
  • Select "PGP Key", then fill out information. Ensure that you use your real email address.
  • Wait for key to finish generating.
  • You may now right-click on the key entry to export, sync or publish your key.
  • Evolution should now hopefully see the key transparently.


How to Setup BIND DNS Server

Reference: copied from http://ubuntuforums.org/showthread.php?t=236093

  • Install bind 9:
sudo apt-get install bind9
  • Configure the main Bind files. Usually, if you install Bind from the source code, you will have to edit the file named.conf. However, Ubuntu provides you with a pre-configured Bind, so we will edit another file:
gksudo gedit /etc/bind/named.conf.local

This is where we will insert our zones. By the way, a zone is a domain name that is referenced in the DNS server Insert this in the named.conf.local file:

# This is the zone definition. replace example.com with your domain name
zone "example.com" {
       type master;
       file "/etc/bind/zones/example.com.db";
};

# This is the zone definition for reverse DNS. replace 0.168.192 with your 
# network  address in reverse notation - e.g my network address is 192.168.0
zone "0.168.192.in-addr.arpa" {
    type master;
    file "/etc/bind/zones/rev.0.168.192.in-addr.arpa";
};
  • Ok, now, let's edit the options file:
sudo -e /etc/bind/named.conf.options
  • We need to modify the forwarder. This is the DNS server to which your own DNS will forward the requests he cannot process.
forwarders {
      # Replace the address below with the address of your provider's DNS server
      123.123.123.123;
};
  • Now, let's add the zone definition files (replace example.com with your domain name:
sudo mkdir /etc/bind/zones
sudo -e /etc/bind/zones/example.com.db
  • The zone definition file is where we will put all the addresses / machine names that our DNS server will know. You can take the following example:
// replace example.com with your domain name. do not forget the . after the domain name!
// Also, replace ns1 with the name of your DNS server
example.com.      IN      SOA     ns1.example.com. admin.example.com. (
// Do not modify the following lines!
                                                        2006081401
                                                        28800
                                                        3600
                                                        604800
                                                        38400
 )

// Replace the following line as necessary:
// ns1 = DNS Server name
// mta = mail server name
// example.com = domain name
example.com.      IN      NS              ns1.example.com.
example.com.      IN      MX     10       mta.example.com.

// Replace the IP address with the right IP addresses.
www              IN      A       192.168.0.2
mta              IN      A       192.168.0.3
ns1              IN      A       192.168.0.1
  • Now, let's create the reverse DNS zone file:
sudo -e /etc/bind/zones/rev.0.168.192.in-addr.arpa
  • Copy and paste the following text, modify as needed:
//replace example.com with yoour domain name, ns1 with your DNS server name.
// The number before IN PTR example.com is the machine address of the DNS server. in my case, it's 1, as my IP address is 192.168.0.1.
@ IN SOA ns1.example.com. admin.example.com. (
                        2006081401;
                        28800; 
                        604800;
                        604800;
                        86400 
)

                     IN    NS     ns1.example.com.
1                    IN    PTR    example.com
  • Ok, now you just need to restart bind:
sudo /etc/init.d/bind9 restart
  • We can now test the new DNS server...
  • Modify the file resolv.conf with the following settings:
sudo -e /etc/resolv.conf
  • enter the following:
// replace example.com with your domain name, and 192.168.0.1 with the address of your new DNS server.
search example.com
nameserver 192.168.0.1
  • Now, test your DNS:
dig example.com

Connect to Internet useing mobile phone/GPRS/EDGE

How to set up internet connection sharing

How to resolve Netbios hostnames

  • Read #General Notes
  • System -> Administration -> Network
  • Network settings
sudo gedit /etc/nsswitch.conf
  • Find this line
hosts:          files dns
  • Replace with the following line
hosts:          files dns wins
  • Save the edited file
sudo apt-get install winbind
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