[vpn-help] DPD parameters

[Da Da]

Hi,

First of all, thank you for this great piece of software. I'm currently
testing the VPN client on Windows x64 with a WWAN access. I've been testing
the version 2.2b1 but I rolled back to v2.1.7 due to stability issues of the
IKED service (I can't reproduce these issues yet).
So I'm back in v2.1.7 and it works fine except one thing : the DPD feature
disconnects the client very quickly if a gateway isn't reachable (about 10
seconds). As I create the VPN tunnel over a native mobile broadband
connection, it's too short. Sometimes, I'm in the train or moving and the
WWAN connection is lost for a few seconds, and Windows recovers it without
problem. But Shrewsoft VPN already disconnected the tunnel...
If I disable the DPD feature, it works. When the WWAN connection goes up
again, the SA is maintained and I received packets again. However, this
create session timeout issues on the facing gateway.
A nice solution would be to increase the number of DPD retries, for it to be
less aggressive. Is there a way to do it easily ?

/David
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