Hi,

On Tue, Jun 16, 2020 at 06:25:22PM +0800, Lang Wang wrote:
> We use `TCP` protocol both on client & server not `UDP`.
> 
> 
> here is sample of client.ovpn:
> 
> ```
> client
> dev tun
> proto tcp4
> ```

Try UDP with mssfix.

TCP should not have MTU problems, but TCP has all sorts of other problems
and is really just a workaround if you are in networks that block UDP.

Maybe a "smart" firewall is interfering with the TCP traffic ("this 
does not look like HTTP/SSL").

gert

-- 
"If was one thing all people took for granted, was conviction that if you 
 feed honest figures into a computer, honest figures come out. Never doubted 
 it myself till I met a computer with a sense of humor."
                             Robert A. Heinlein, The Moon is a Harsh Mistress

Gert Doering - Munich, Germany                             g...@greenie.muc.de

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