A university site with downloads for the Nortel convitivy client used for Linux. Milage may vary in use. The site is in German (although the screen shots are in English), so some skills in reading German or with a translation service will be needed.
I no longer need this client and don't have it installed anywhere as I've left the job that used the Nortel client. I've left this link up on my site as it appears to be a very popular search engine target. I had a hard time finding this client when I went hunting and am glad to shorten your search.

English translation of Nortel Contivity VPN for Linux details
Additional details sent to me via private message after the comments were closed on this topic.
For people that can't read German, and don't know how to translate to
English they can use this link if you'd like to post on that page:
link to translate.google.com
This will translate using google, into English.
If they wish to translate to another language the can visit
translate.google.com paste the shortcut to the German site link that you've
provided into the box at the top, select which language they are
translating from and to in the drop-downs... and they are away.
hope that is some help.
cheers
The link
Hello,
Every time I click on the link, I receive a page not found error on your website. Could you provide the link please?
Thank you!
Tony
The web links from
The web links from mclewin.com do appear to be broken after a recent upgrade. I'll get that fixed.
There's a new solution that
There's a new solution that is in userspace called vpnc.