Question

Hello,

I configured a site to site VPN, the RUT955 is the client, a Mikrotik router is the server.

My Mikrotik router indicates that the VPN is running.

Side RUT955, the logread | grep ovpn command return lines:

daemon.err ... write to TUN/TAP: invalid argument (code=22)

The window status > network > openvpn display no info and the refresh button is grayed.

Could you give info for debugging this situation ?

Thank you by advance,

Note: I am aware that my RUT955 is not well configured

Answer 1

Hello,

I would suggest using logread | grep openvpn.

This error usually means that server is using LZO compression but the client doesn't. Is LZO compression enabled on RUT955?

Comments

No messages about LZO in the log

My server is a Mikrotik router. The compression is not (yet) supported by Mikrotik.

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The only logs you can find is in logread command.