The Windows users have a new client "Juniper Pulse" to connect to the Juniper VPN server.

On Linux, what VPN client do we have to connect to that Juniper VPN, with maximum compatibility?

Please mention the necessary parameters that have to be provided.

7 Answers 7


And my favorite method (no java applet required):



REALM=$(wget -q --no-check-certificate -O - 'https://some.site.com/dana-na/auth/url_default/welcome.cgi' | sed -n 's/.*<input\( [^>]*name="realm" [^>]*\)>.*/\1/p' | sed -n 's/.* value="\([^"]*\)".*/\1/p')

After you login, download the following jar (should be done one time only):


and unzip it to ~/.juniper_networks/network_connect

Get some new libraries for your 64bit machine yum install glibc.i686 zlib.i686 nss-mdns.i686

Go to ~/.juniper_networks/network_connect and

sudo chown root:root ncsvc
sudo chmod 6711 ncsvc
chmod 744 ncdiag
chmod +x getx509certificate.sh

Get your certificate:

./getx509certificate.sh some.site.com company.cert

And connect:

./ncsvc -h some.site.com -u username -p password -r REALM -f ./company.cert

For some sites I noticed that you also need to put the -U switch:

./ncsvc -h some.site.com -u username -p password -r REALM -f ./company.cert -U 'https://some.site.com/dana-na/auth/url_default/welcome.cgi'

The OpenConnect VPN client has (nascent) support for Juniper SSL VPN.

See the announcement at http://lists.infradead.org/pipermail/openconnect-devel/2015-January/002628.html

Edit 2015-02-02:

The Juniper support is coming along nicely now and is definitely ready for more testing. It's reached the point where we're happy to admit to its existence on the OpenConnect web site: http://www.infradead.org/openconnect/juniper.html

  • 4
    You should include a copy of the announcement in your answer -- that link could go dead at some time in the future leaving your answer null & void. It's OK to leave the link as well as a reference.
    – fukawi2
    Jan 27, 2015 at 1:26
  • 1
    A good point in theory in the general case — but in this case if the server hosting my mailing list archive is offline, so is my git repository. The details in the announcement won't do you much good if you can't get to the code anyway :) Yes, I could include a summary of the announcement, concise and also relatively future-proof so it doesn't include specifics of what has and has not been implemented yet today. That summary is best phrased as "OpenConnect has nascent support for Juniper SSL VPN" :)
    – dwmw2
    Jan 28, 2015 at 12:10
  • 1
    Now that openconnect supports Juniper (July 2015) - This is the correct and easier answer. Works for me. I had to manually build openconnect thought. Jul 13, 2015 at 20:54

What I usually do is use openconnect, it has to run as root, from the terminal window and you have to use the --juniper flag like this:

sudo openconnect --juniper http://your.vpn.server.here

It will ask for your user name and password and will connect you to your vpn.

The only caveat is that the terminal window has to be open all the time and it may drop once or twice in a day, you have to re-connect.


Network-Connect is the Old Juniper VPN. It is no longer used/shipped by juniper, everything is now Pulse secure. The information on this site is old. Pulse Secure is not supported on Linux.

  • 1
    Thx for the information - the question is indeed 4 years old.
    – Déjà vu
    Mar 13, 2016 at 5:06
  • 6
    This is not correct. Pulse Secure actually is supported on Linux. The Pulse Secure client pulsesvc is essentially a drop in replacement for ncsvc. The latest version of the Pulse Secure Desktop Client was released just this month and now seems to even have a working GUI.
    – Adaephon
    Dec 21, 2016 at 7:40

I found this page to be the most use for me. mad scientist


On Ubuntu 15.10:

  • sudo apt-get install icedtea-7-plugin openjdk-7-jre:i386
  • sudo ln -s /usr/bin/update-alternatives /usr/sbin/ (this may already exist)
  • sudo apt-get install libstdc++6:i386 lib32z1 lib32ncurses5 libxext6:i386 libxrender1:i386 libxtst6:i386 libxi6:i386

Then connect to your VPN as you would normally through the web interface. You'll need to allow the IcedTea plugin to run in your browser (I used Firefox) when it prompts you. There are also a number of prompts to trust software from a remote site, and it pop up a terminal for your password.


I believe this is answered on Juniper's forum here - specifically for Network Connect (I'm assuming that's what you're wanting to do). They have excellent screenshots, etc to help you through the process (Five steps).

  • 5
    The linked page now requires a login. Sep 20, 2013 at 21:19

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