[Openswan Users] VPN connection dropping off

[Ogonna Iwunze]

hello people,

I trust someone has come across this type of VPN connectivity issue that I'm having and perhaps will be able to help me out.

I have a VPN tunnel (site-to-site) between a remote Linux box running OpenSwan and a Cisco ASA 5510 (gateway to my LAN) recently implemented.  Connectivity between both peers establishes ok and I can ping either ends as well as send traffic to and fro too.  However, each time there is persistent traffic through the tunnel (e.g. while rsync/coping a file or folder 5GB in size) which lasts for about 10 mins or more, the VPN connection drops out.  At this time, I can neither ping nor access my remote linux server.  The effect of this loss in connectivity is that I'm unable to remotely backup the server (using tar, rsync etc) or copy large items from the remote server.

Below is my configuration in ipsec.conf

conn MYCONX
        type=tunnel
        authby=secret
        left=78.24.162.20           # IP address of linux server
        leftsubnet=78.24.162.20/32    
        leftnexthop=%defaultroute
        right=92.144.129.148        # Outside interface address of Cisco ASA 5510
        rightsubnet=192.168.0.0/16
        rightnexthop=%defaultroute
        esp=aes128-sha1
        keyexchange=ike
        pfs=no
        auto=start
        ikelifetime=4h          


Many thanks in advance for your help

Og