[vpn-help] 2.1.5 -> 2.1.6b10 -- Connection silently dies after 5 minutes

[Matthew Grooms]

On 7/7/2010 8:01 AM, Aaron Sarazan wrote:
> This is an old problem that plagues my Win7-64 machine with all client
> versions, but doesn't seem to even affect my Ubuntu machine (or any
> coworkers' machines for that matter).
>
> I'll successfully connect to the gateway, ping inside the network, and
> all is happy. After about five minutes, the connection will silently
> fail and pings will time out. According to the "Network" tab, it is
> still established, and the trace utility doesn't show anything but a
> bunch of keep-alives for phase 1:
>
>     10/07/07 08:53:59 DB : phase1 found
>     10/07/07 08:53:59 -> : send NAT-T:KEEP-ALIVE packet
>     192.168.2.101:4500 <http://192.168.2.101:4500> ->
>     98.101.134.218:4500 <http://98.101.134.218:4500>
>
> Also the "VPN Connection Status" on the Netgear admin page lists it as
> "IPsec SA Established". The connection won't return until I do a manual
> disconnect/reconnect.
>
> On a possibly related note, it's listing Dead Peer Detection as
> disabled, even though I've enabled it on both the client and server
> side. Any thoughts on that?
>

Hi Aaron,

This sounds like a firewall state expired which is odd considering the 
NAT-T keep-alive packets. If you start a ping -t to a host behind the 
gateway and leave it running, does the connection still appear stable 
after 30 mins or so?

-Matthew