[Users] must first ping from right to left...

From: jef peeraer (jef.peeraer_at_pandora.be)
Date: Tue Jan 14 2003 - 21:06:35 CET


I've finally got subscribed ! So i fire away my question :
My project involves one hosted server, and 15 roadwarriors with a thin-client
solution ( LTSP ) attached to it. The connection between the roadwarrios and
the server should be secure. I've got a test setup already, a working
freeswan configuration ( i think ), but i always have to ping from the server
to the roadwarriors before the roadwarriors can access the server.

Setup looks like this :

left :
---| freeswan gateway |--------| adsl router | ====
         192.168.1.10 192.168.1.1 dyn ip

right :
   static ip 192.168.0.234 192.168.0.30
=====| adsl router | ----------------------| freeswan gateway/server | -----
   x.y.z.w

the adsl routers do vpn passthru, corrct ports are forwarded to the freeswan
gateways. The two configs ( left and right are somewhat different because of
the port forwarding.

right :
conn welzijns2
        type = tunnel
        # Left security gateway, subnet behind it, next hop toward right.
        left=%any
        leftid=@welzijn.deterp.be
        leftrsasigkey=....
        leftnexthop=192.168.1.1
        leftsubnet=192.168.1.0/24
        # Right security gateway, subnet behind it, next hop toward left.
        right=%defaultroute
        rightid=@master.deterp.be
        rightrsasigkey=...
        #rightnexthop=192.168.0.234
        rightsubnet=192.168.0.0/24
        #auto=add

left:
conn welzijns2
        type = tunnel
        # Left security gateway, subnet behind it, next hop toward right.
        left=%defaultroute
        leftid=@welzijn.deterp.be
        leftrsasigkey=...
        #leftnexthop=192.168.1.1
        leftsubnet=192.168.1.0/24
        # Right security gateway, subnet behind it, next hop toward left.
        right=x.y.z.w
        rightid=@master.deterp.be
        rightrsasigkey=
        rightnexthop=192.168.0.234
        rightsubnet=192.168.0.0/24
 
I always have to ping from the right to left first, ( 192.168.0.30 to
192.168.1.10 ) , the i can ping from left to right. But after a while , i end
up in the above situation. I could implement a script on the right freeswan,
but i prefer too know what is happening....

Jef Peeraer

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