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Connect IMSc OpenVPN using Network Manager in UBUNTU

Step 1 Install the following packages

Step 2 Generate the Key Pair

Hint:You should Put non-trivial passphrase when you are prompted for one.This will produce two files:

$HOME/.ssh/id_rsa Your private key file$HOME/.ssh/id_rsa.pub Your public key file

Keep the private key very safely.

Step 3 Certificate Signing Request From OpenSSH private key

Send the generated certificate signing request fie id_rsa.csrto IMSc sysadmin for signing

the key by mail.After signing the key IMSc SysAdmin will send back the user certificate file client.crt,

the CA certificate file imsc_openvpn_ca.crt and openvpn configuration files

imsc_wan.confand imsc_lan.conf. Usually IMSc SysAdmin will send the all file in one

compressed tar file as username.tgz

Store all the files sent by IMSc SysAdmin to $HOME/.openvpn/ and the private key file$HOME/.ssh/id_rsa to $HOME/.openvpn/ as client.key

sudo apt-get install network-manager-openvpn openvpn ssh

ssh-keygen -t rsa

openssl req -new -extensions v3_req \-key $HOME/.ssh/id_rsa -out $HOME/.ssh/id_rsa.csr

tar -zxvf $USERNAME.tgz

cp $HOME/.ssh/id_rsa $HOME/.openvpn/client.key

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Step 4 Configuring OpenVPN on Network Manager

Step-1Click at Network

Manager icon

Step-2Click at

VPN Connections

Step-3Click at

Configure VPN...

Step-4Click at Import

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Step-5Select and open the file

$HOME/.openvpn/imsc_wan.conf

Step-6Verify all the all

the arrowmarked entries

are same as likethe figure

Step-7Click at

Ipv4 Settings

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Step-8Select Automatic (VPN)

Addtess Only

Step-9Add 172.16.1.71

Step-10Add imsc.res.in

Step-11Click at Routers

Step-12Put tick mark at Use the connection

only for resources on its network

Step-13Click Ok

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Now Your machine is ready to connect VPN ServerBefore that, it is better to re-login and use the VPN connection

Step-14Click Apply

Step-15Click Close

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Step 5 Starting the VPN Connection imsc_wan

Step-1Click at Network

Manager icon

Step-2Click at

VPN Connections

Step-3Click at imsc_wan

Step-4Give your Passprase

Step-5Click Ok

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Now the VPN connection to IMSc network is established.

Appendix 1 Browsing the Journals subscribed by IMSc Library

For Browsing the Journals which are subscribed by IMSc:* You need to connect to imsc_wan using VPN connection explained in step 5* Add the IP address 172.16.1.71 and the port 3128 to your browser proxy settings

Now You can Browse all journals subscribed by imscNote:

Once you have disconnected the imsc_wan VPN Connection then you have to revoke back thebrowser proxy setting to old one.

Hint:for switching between multiple proxy, firefox providing many addons ( plugins ). You can try

any one of that

samplehttps://addons.mozilla.org/en-US/firefox/addon/125/

Step-6Verify that the Lock icon is added in

Network Manager icon