SSH traffic over openvpn connection freezes when I cat a file

Solution 1:

smells like mtu issue. try to lower it as described in official manual or in this blog post.

Solution 2:

This command solves it for me:

$ sudo ip link set dev tun0 mtu 1350 && echo ":)"

You can Verify tun0 settings with

$ ip a s

Cheers!

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Solution 3:

Yep, it's all about MTU.

But in my case I've got a problem even more weird. At home, using an OpenVPN Windows client it freezes. But in my office it works fine.

I tried to change it on my ADSL Modem without success. At my Office I use a cable modem and other ISP.

After changing the MTU of Windows TAP adapter to 1200, it works fine. Something high than that, would freeze for me.