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defka
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Posts: 3
Joined: Sun May 10, 2015 8:21 pm

OpenVPN only works within integrated RouterOS client

Sun May 10, 2015 8:42 pm

Hi,

I'm not being able to work an OpenVPN configuration with clients from Windows or Linux, it only works within the OVPN Client integrated on Mikrotik, and it works fine.

This is the client configuration:
# Specify that we are a client and that we
# will be pulling certain config file directives
# from the server.
client

# Use the same setting as you are using on
# the server.
# On most systems, the VPN will not function
# unless you partially or fully disable
# the firewall for the TUN/TAP interface.
dev tap


# Windows needs the TAP-Win32 adapter name
# from the Network Connections panel
# if you have more than one.  On XP SP2,
# you may need to disable the firewall
# for the TAP adapter.
;dev-node MyTap

# Are we connecting to a TCP or
# UDP server?  Use the same setting as
# on the server.
proto tcp

# The hostname/IP and port of the server.
# You can have multiple remote entries
# to load balance between the servers.
remote myIP 1194


# Choose a random host from the remote
# list for load-balancing.  Otherwise
# try hosts in the order specified.
;remote-random

# Keep trying indefinitely to resolve the
# host name of the OpenVPN server.  Very useful
# on machines which are not permanently connected
# to the internet such as laptops.
resolv-retry infinite

# Most clients don't need to bind to
# a specific local port number.
nobind

# Downgrade privileges after initialization (non-Windows only)
;user nobody
;group nobody

# Try to preserve some state across restarts.
persist-key
persist-tun

# If you are connecting through an
# HTTP proxy to reach the actual OpenVPN
# server, put the proxy server/IP and
# port number here.  See the man page
# if your proxy server requires
# authentication.
;http-proxy-retry # retry on connection failures
;http-proxy [proxy server] [proxy port #]

# Wireless networks often produce a lot
# of duplicate packets.  Set this flag
# to silence duplicate packet warnings.
;mute-replay-warnings

# Username/Password authentication is used on the server
auth-user-pass

# SSL/TLS parms.
# See the server config file for more
# description.  It's best to use
# a separate .crt/.key file pair
# for each client.  A single ca
# file can be used for all clients.
ca ca.crt

# Verify server certificate by checking
# that the certicate has the nsCertType
# field set to "server".  This is an
# important precaution to protect against
# a potential attack discussed here:
#  http://openvpn.net/howto.html#mitm
#
# To use this feature, you will need to generate
# your server certificates with the nsCertType
# field set to "server".  The build-key-server
# script in the easy-rsa folder will do this.
;ns-cert-type server

# If a tls-auth key is used on the server
# then every client must also have the key.
;tls-auth ta.key 1

# Select a cryptographic cipher.
# If the cipher option is used on the server
# then you must also specify it here.
;cipher x

# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo

# Set log file verbosity.
verb 3

# Silence repeating messages
;mute 20

Compression is deactivated on both sides, and I'm using auth-user-pass directive without client certificates (option also unchecked on server side). Host firewalls on the client, are not blocking any connections, and I have added a TCP incoming rule on the Mikrotik for port 1194 and a NAT masquerade rule. Clients are using last version of OpenVPN client under Windows 7, the error log is:

,
Sun May 10 19:30:24 2015 TCP connection established with [AF_INET]1XX.XXX.XX3:1194
Sun May 10 19:30:24 2015 TCPv4_CLIENT link local: [undef]
Sun May 10 19:30:24 2015 TCPv4_CLIENT link remote: [AF_INET]1XX.XXX.XX3:1194
Sun May 10 19:30:24 2015 MANAGEMENT: >STATE:1431279024,WAIT,,,
Sun May 10 19:30:24 2015 MANAGEMENT: >STATE:1431279024,AUTH,,,
Sun May 10 19:30:24 2015 TLS: Initial packet from [AF_INET]1XX.XXX.XX3:1194:1194, sid=6e2ee33d 4f8302bf
Sun May 10 19:30:24 2015 VERIFY OK: depth=1, C=ES, S......
Sun May 10 19:30:24 2015 VERIFY OK: depth=0, C=ES, S.......
Sun May 10 19:30:26 2015 Connection reset, restarting [0]
Sun May 10 19:30:26 2015 SIGUSR1[soft,connection-reset] received, process restarting
Sun May 10 19:30:26 2015 MANAGEMENT: >STATE:1431279026,RECONNECTING,connection-reset,,
Sun May 10 19:30:26 2015 Restart pause, 5 second(s)

On server side log, it says:

TCP connection established from [public Ip client]

Anyone has a clue about this issue???
Many thanks.
 
kamillo
Member Candidate
Member Candidate
Posts: 162
Joined: Tue Jul 15, 2014 5:44 pm

Re: OpenVPN only works within integrated RouterOS client

Mon May 11, 2015 2:14 pm

Hi there,

From the config file you posted it looks like you are trying to use compression:

# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo


try and comment out the line with comp-lzo.
As far as I remember OpenVPN on Mikrotik doesn't support compression.

Best,
 
defka
just joined
Topic Author
Posts: 3
Joined: Sun May 10, 2015 8:21 pm

Re: OpenVPN only works within integrated RouterOS client

Mon May 11, 2015 11:46 pm

Hi there,

From the config file you posted it looks like you are trying to use compression:

# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo


try and comment out the line with comp-lzo.
As far as I remember OpenVPN on Mikrotik doesn't support compression.

Best,
Yes, it's true, I forgotten that.

I have fixed it, but it stills doesn't work.

Any new idea? Someone?
 
kamillo
Member Candidate
Member Candidate
Posts: 162
Joined: Tue Jul 15, 2014 5:44 pm

Re: OpenVPN only works within integrated RouterOS client

Tue May 12, 2015 12:18 pm

I have seen connection restarting like that when username or password was incorrect. Remember that username is case sensitive

Could you post your router configuration for OpenVPN?
 
defka
just joined
Topic Author
Posts: 3
Joined: Sun May 10, 2015 8:21 pm

Re: OpenVPN only works within integrated RouterOS client

Tue May 12, 2015 10:18 pm

I have seen connection restarting like that when username or password was incorrect. Remember that username is case sensitive

Could you post your router configuration for OpenVPN?
Hi, many thanks for the advice.

I created a new 'Secret' (user/pass) on the OVPN server, and tried all the authentication and hash options, and now It works.

Basically, the problem, is some type of incompatibility between the last version of OpenVPN client and the current version of OVPN Server on RouterOS 6.28, if you only leave selected SHA1/ AES192/A256, it simply doesn't work. I have had to check all options (except 'null' one...).

Appreciate your time.

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