Difficulty to use Mikrotik as OpenVPN client (TCP without compresion)

RouterOS General
1

Hi,

First of all, I know that UDP protocol and compresion are not supported by the Mikrotik RouterOS and I cannot find an answer to my question in Google nor in searching that forum.

I’m actually trying to connect the Mikrotik as a ovpn client to a Sophos XG ovpn server.

When I use the Windows OpenVPN client it works well with the following settings: TCP, auth MD5 / cipher AES-128-CBC / comp-lzo no

When I configure the same on Mikrotik, using a PPP Profile with compression=no, it connects fine but when I try to send a ping I get the following error on the server : “Bad LZO decompression header”

It’s like the Mikrotik cannot say to the server that it is not using compression ?

Someone know how to solve that problem ?

2

Compression in PPP profile has nothing to do with LZO.
LZO is not supported, see the manual on which features are supported and which not:
https://wiki.mikrotik.com/wiki/Manual:Interface/OVPN

3

Thanks for your answer. It’s ok that LZO compression is not supported and actually the server is not requiering lzo.
So I cannot understand why it dosen’t work ?

Isn’t there a way to mimate the “comp-lzo no” option of the Windows OVPN client and get the VPN work without LZO compression ?

4

ive been also looking how to configure mikrotik openvpn but all i found is you cant config it because its broken, i hope mikrotik will fix it