Hi! I use openvpn for some time, usually to connect to my server, but sometimes I'd like to put whole traffic through it. The configuration is: local network -> microtik -> VPN -> Linux server -> internet. My bandwidth is upload is 2Mbps, download 16Mbps (without ovpn). Iperf3 when using ovpn shows 2Mbps for upload and download between the local network and Linux server. The problem is with the internet connection. If I route all the traffic through VPN I get (on speedtest) sometimes download around 16Mbps and sometimes around 0. Upload is always 0. Connection is unstable. I read a lot of forums but nothing worked. :-( I think that problem can be with routing, but I can solve that myself. I attach my config below. [code] #GENERAL dev tun proto tcp ---> microtik allows only TCP port 1194 user nobody group nogroup server 10.8.0.0 255.255.255.0 persist-key persist-tun keepalive 10 120 client-to-client #CERTIFICATES cipher AES-256-CBC --> BF or none don't change anything ca /etc/openvpn/ca.crt cert /etc/openvpn/server.crt key /etc/openvpn/server.key dh /etc/openvpn/dh2048.pem #LOGGING status /var/log/openvpn-status.log log-append /var/log/openvpn.log verb 3 #ROUTING & DNS push "route 10.8.0.0 255.255.255.0" push "dhcp-option DNS 8.8.8.8" #TWEAKING --> those are my experiments --> nothing really worked. #sndbuf 0 #rcvbuf 0 #push "sndbuf 393216" #push "rcvbuf 393216" #txqueuelen 1000 #tcp-queue-limit 256 --> queue on mikrotik increased as well #tun-mtu 6000 #fragment 0 #mssfix 0 [/code] I don't use "oconf" because of hiding comments in code.

--[b]proto udp[/b] is normally faster.

Slow and unstable vpn<->net

wawax

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TinCanTech

wawax wrote

#TWEAKING --> those are my experiments --> nothing really worked.
#sndbuf 0
#rcvbuf 0
#push "sndbuf 393216"
#push "rcvbuf 393216"
#txqueuelen 1000
#tcp-queue-limit 256 --> queue on mikrotik increased as well
#tun-mtu 6000
#fragment 0
#mssfix 0

These will not trick your ISP into giving you more speed. They are for fixing problem connections.

My guess would be the Mikrotik router is simply garbage and maybe your ISP rate limit you because you use too much.

wawax

It can be a problem with router. I configured openvpn client on windows in the local network. With the same configuration, it worked were well (2/16Mbits).

I don't need more speed, I just need this speed to be available in VPN. Maybe I have to change router.

TinCanTech

--proto udp is normally faster.

wawax

Yes, but Mikrotik doesn't support it.