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OVPN in UDP with linux OVPN server

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maxpage
newbie
Topic Author
Posts: 27
Joined: Sun Jul 15, 2018 7:01 pm

OVPN in UDP with linux OVPN server

Sun Jul 02, 2023 3:49 pm

I have question. Is MT OVPN UDP implementation compatible with openvpn.net implementation ?

I have following configuration on OpenVPN Server (OpenVPN 2.6.3 x86_64-pc-linux-gnu Debian 12)
Code: Select all
server 172.16.0.0 255.255.255.0
topology subnet
dev tun
proto tcp
port 1194
keepalive 10 120

ca ca.crt
cert server.crt
key server.key
dh dh.pem

auth SHA256
data-ciphers AES-256-GCM:AES-256-CBC:AES-128-GCM:AES-128-CBC
data-ciphers-fallback AES-256-CBC
engine aesni
On TCP mode woks perfect (with Hardware Acceleration)
Image
ovpn.png
When I simply switch configuration to udp (replacing only one line):
Code: Select all
proto udp
Connection to MT OVPN client stopped working:
ovpn1.png
Image

Some logs from server:
Code: Select all
2023-07-02 14:37:13 OpenVPN 2.6.3 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] [DCO]
2023-07-02 14:37:13 library versions: OpenSSL 3.0.9 30 May 2023, LZO 2.10
2023-07-02 14:37:13 DCO version: N/A
2023-07-02 14:37:13 TUN/TAP device tun0 opened
2023-07-02 14:37:13 net_iface_mtu_set: mtu 1500 for tun0
2023-07-02 14:37:13 net_iface_up: set tun0 up
2023-07-02 14:37:13 net_addr_v4_add: 172.16.0.1/24 dev tun0
2023-07-02 14:37:13 Could not determine IPv4/IPv6 protocol. Using AF_INET
2023-07-02 14:37:13 UDPv4 link local (bound): [AF_INET][undef]:1194
2023-07-02 14:37:13 UDPv4 link remote: [AF_UNSPEC]
2023-07-02 14:37:13 Initialization Sequence Completed
2023-07-02 14:37:19 0.0.0.0:50847 Note: OpenSSL hardware crypto engine functionality is not available
2023-07-02 14:37:19 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:19 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_ACK_V1)
2023-07-02 14:37:20 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:21 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:22 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:23 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:24 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:25 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:26 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:27 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:28 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:29 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:30 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:31 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:32 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:33 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:34 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:35 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:36 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:37 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:38 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:39 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:40 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:41 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:42 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:43 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:44 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:45 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:46 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:47 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
2023-07-02 14:37:48 0.0.0.0:50847 TLS Error: Unroutable control packet received from [AF_INET]0.0.0.0:50847 (si=3 op=P_CONTROL_V1)
^C2023-07-02 14:37:51 event_wait : Interrupted system call (fd=-1,code=4)
2023-07-02 14:37:51 net_addr_v4_del: 172.16.0.1 dev tun0
2023-07-02 14:37:51 SIGINT[hard,] received, process exiting
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challado
newbie
Posts: 45
Joined: Tue Jul 01, 2008 2:53 am

Re: OVPN in UDP with linux OVPN server

Thu Oct 05, 2023 6:25 pm

Same problem here. And with a linux openvpn client, all works fine on UDP too. Only with mikrotik I have these problem. Did you find any solution?
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JMLabs
just joined
Posts: 2
Joined: Thu Dec 21, 2023 6:53 pm
Location: Stuttgart

Re: OVPN in UDP with linux OVPN server

Thu Dec 21, 2023 7:10 pm

I have the same problem. I haven't been able to win for a week. Please help me if there is a solution.
I checked the date, changed the encryption settings, even changed the OpenVPN version. It's still an error.
TLS Error: Unroutable control packet received from [AF_INET] (si=3 op=P_CONTROL_V1)
RouterOS 7.12.1
OpenVPN server 2.6.1-1ubuntu1.1
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neo89skynet
just joined
Posts: 1
Joined: Thu Apr 04, 2024 2:12 pm

Re: OVPN in UDP with linux OVPN server

Thu Apr 04, 2024 2:13 pm

Found a solution to the problem? I have exactly the same problem. Who can help?
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VictorS
just joined
Posts: 1
Joined: Sun Apr 14, 2024 4:41 pm

Re: OVPN in UDP with linux OVPN server

Sun Apr 14, 2024 4:46 pm

I have this problem too, OpenVPN 2.6.3/Debian 12, RouterOS 7.13.4
Are there any ideas anyone?
Last edited by VictorS on Sun Apr 14, 2024 5:05 pm, edited 1 time in total.
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