Shrew VPN Client + Juniper SRX : "session terminated by gateway" (Autodisconnect)

If like me, you're trying to connect to a Juniper dynamic VPN with Shrew VPN Client, be aware that this not yet possible.

The connection works but the tunnel is constantly disconnected after 60 seconds.

I asked the core developer "Matthiew Grooms" about this and after few debug, it seems like a fix is needed in Shrew's code:

"It's pretty clear whats going on but it won't be possible to fix without 
a rewrite of the modecfg code on the Shrew Soft VPN client, which is probably 
needed anyway."

Full technical details are available at :
https://lists.shrew.net/pipermail/vpn-help/2012-December/014091.html

If anybody found out an alternative solution please share !