Ubuntu – How to get Netextender (VPN) working in Ubuntu 12.10 x64

vpn

At work we have to use Sonicwall Netextender to connect over VPN. The NetExtender client works fine on Windows x64 for me, but when using the same settings in my Ubuntu , the connection seems to work fine at first – But after just some packages have been sent, it slows down to almost 0 or 0 ( the connection is still up and seems fine)

Some other people at work have the same NetExtender problem with their Ubuntusetups, so we belive it's some failure with the NetExtenderclient – or that some workaround is needed with it.

So the Question is: Has anyone had success in using NetExtender on Ubuntu 12.x, and what specific settings did you use?

Also – are there any Open Source alternative NetExtender clients we could use instead of the SonicWalls one?

BTW (I tried stuff like this http://www.webantix.net/2012/02/sonicwall-netextender-on-ubuntu-x64.html)

Also tried with latest NetExtenderPackage "NetExtender.Linux.7.0.741.x86_64" and it's the same symptoms – i can connect successfully, fetch about one webpage, and then everything just seem to stall. I also upgraded to Ubuntu 13.04.

Irritating that it works flawlessly on the same machine with Windows 7 in dualboot, same settings.

Best Answer

See Franck Routiers Post:

Note, you'll have to have the Java Development Kit installed on your System.

1) go to https://sslvpn.demo.sonicwall.com/cgi-bin/welcome

2) log in with demo/password

3) click on NetExtender icon, this will download a tar.gz with the client

4) sudo ln -s /lib/x86_64-linux-gnu/libssl.so.1.0.0 /usr/lib/libssl.so.6

5) sudo ln -s /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 /usr/lib/libcrypto.so.6

6) un-tar the client, make install script executable and launch install

You're done.

Connect with :

sudo netExtender -u user -p password -d domain server

(and see man netExtender)

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Ubuntu – Ubuntu VPN Using Sonicwall

Go to https://sslvpn.demo.sonicwall.com/cgi-bin/welcome log in with demo/password
Click on NetExtender icon: this will download a tar.gz with the client.
(Optional) sudo ln -s /lib/x86_64-linux-gnu/libssl.so.1.0.0 /usr/lib/libssl.so.6
(Optional) sudo ln -s /lib/x86_64-linux-gnu/libcrypto.so.1.0.0 /usr/lib/libcrypto.so.6
Untar the client, make install script executable (chmod u+x) and launch install

NB: When executing the installation script, do not allow root access

sudo ./install

--- Dell SonicWALL NetExtender 7.5.761 Installer ---
Checking library dependencies...
Checking pppd...
Do you want non-root users to be able to run NetExtender?
    If so, I can set pppd to run as root, but this could be
    considered a security risk.

Set pppd to run as root [y/N]? N
You have chosen NOT to allow non-root users to run NetExtender.
Copying files...

------------------------ INSTALLATION SUCCESSFUL -----------------------

To launch NetExtender, do one of the following:

Click the NetExtender icon under the Applications menu (look under the 'Internet' or 'Network' category) or
Type netExtenderGui

Solution tested from Ubuntu 13 to 18.04.

Ubuntu – How to get NetExtender VPN client on Ubuntu 13.04 working

Sure enough, it was a routing problem.

With the connection active, I compared the routing tables between a Mac that worked and Ubuntu that did not, and sure enough the route from my public (dynamic) IP to the gateway inside the tunnel was not there. The NetExtender logs also indicate "Error determining existing route to ssl-vpn"

To fix it, in a terminal window, do:

sudo route add -net (your-VPNs-public-ip) netmask (your-VPNs-netmask) gw (your-tunnels-gateway) dev (your-ethernet-device)

For example, mine was something like this. It took a few tries in my case as the connection kept dying and reconnecting - something to do with the Sonicwall thinking the connection wasn't active?:

sudo route add -net 1.2.3.4 netmask 255.255.255.255 gw 192.168.0.1 dev wlan0

Got the idea from here: http://ubuntuforums.org/showthread.php?t=2146122&highlight=netextender

Best Answer

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Ubuntu – Ubuntu VPN Using Sonicwall

Ubuntu – How to get NetExtender VPN client on Ubuntu 13.04 working

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