Try smaler mtu size on cient and server side.

tun-mtu 1454

and if this does not work:
fragment 1300
mssfix

Regards, Eike


Am 07.08.2013 20:35, schrieb Frank Fiene:
I have not exactly the same problem but i think two of my sales reps providers 
are blocking this too.

We are using a UTM with integrated openVPN server, running on port 443 UDP.

When only a ping is running, no problem, but if the sales reps are doing high 
bandwidth traffic, after 2-3 minutes the connection stops making traffic.
On the server the connection is still established, the client restarts after 1 
minute of no traffic, is getting a new connection and IP.
2 minutes later the openVPN server drops the old VPN connection because of no 
traffic.

The same client with his neighbors Internet Connection (another provider) is 
running fine!
I think i have to contact the provider what the hell they are doing!

Regards
Frank


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