[strongSwan] strongswan+xl2tpd+ppp for multiple connections

[Volker Rümelin]

Hi,

> I want to use i2tp/ipsec as compatible connect.
> Why Can't build user multiple connections at the same time(only one user).
> User A was connected the server . but when user B connected the server soon , the A or B link-line will down

I guess you meant multiple users behind the same NAT device. Multiple 
users with different IP addresses work without problem.

Here is a good explanation why it doesn't work in your case and also how 
to make it work.
http://wiki.strongswan.org/issues/365

Regards,
Volker