Can't perform RDP connection between server and peer (No Firewall)

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sniceper
OpenVpn Newbie
Posts: 2
Joined: Wed Jul 19, 2017 7:51 pm

Can't perform RDP connection between server and peer (No Firewall)

Post by sniceper » Wed Jul 19, 2017 8:08 pm

Hello,

I just installed Open VPN Server on a Windows machine for the first time (Windows 10 Pro). The goal is, for some remote client computers ( Windows 10 Pro as well), to securely access to that server resources.

I'm currently trying to configure my first connection with RDP.

So, to make a summary:
* OpenVPN Server is Online. (local address: 192.168.1.17 / VPN Address 10.8.0.1)
* OpenVPN Client is Online in another network. (local address 192.168.1.2 / VPN address 10.8.0.6)
* Client can ping 10.8.0.1
* Server can ping 10.8.0.6
* Both Client and server Firewalls are Disabled for testing purpose
* RDP is running well when connection is performed with a client from same network as server.

When performing a RDP Connection from client to server, it fails. To get a bit more details, I have performed a Network monitor Trace on both machines to know where is the issue. From what i can see, The client perform the SYN Request , that arrive on the server as expected. My problem is that the server don't even try to answer. Indeed, i can't even see that the server is sending a response. The next packet is a TCP RETRANSMIT from the client, which is still expecting a response.

Since I'm really a noob with VPN technologies, and with particularly with OpenVPN, i wonder if my problem may be due to Routing issue? Actually I'm Not Sure to understand Route and Push system very well. Here is my config on server side:

;local a.b.c.d

port 1199

;proto tcp
proto udp

;dev tap
dev tun

;dev-node MyTap

ca ca.crt
cert server.crt
key server.key

dh dh1024.pem

;topology subnet

server 10.8.0.0 255.255.255.0

ifconfig-pool-persist ipp.txt

;server-bridge 10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100

;server-bridge

;push "route 192.168.10.0 255.255.255.0"
push "route 10.8.0.0 255.255.255.0"


;client-config-dir ccd
;route 192.168.40.128 255.255.255.248

;client-config-dir ccd
;route 10.9.0.0 255.255.255.252
;learn-address ./script

;push "redirect-gateway def1 bypass-dhcp"

;push "dhcp-option DNS 208.67.222.222"
;push "dhcp-option DNS 208.67.220.220"
client-to-client

;duplicate-cn

keepalive 10 120

tls-auth ta.key 0 # This file is secret

cipher AES-256-CBC

;compress lz4-v2
;push "compress lz4-v2"

;comp-lzo

;max-clients 100

;user nobody
;group nobody

persist-key
persist-tun

status openvpn-status.log

;log openvpn.log
;log-append openvpn.log

verb 3
explicit-exit-notify 1

If you have any other idea, I'm Interested As Well :)
Please do't hesitate if you need further informations.
Thank you very much in Advance. ;)


User avatar
Pippin
Forum Team
Posts: 1201
Joined: Wed Jul 01, 2015 8:03 am
Location: irc://irc.libera.chat:6697/openvpn

Re: Can't perform RDP connection between server and peer (No Firewall)

Post by Pippin » Wed Jul 19, 2017 9:31 pm

^^^
OpenVPN Server ...local address: 192.168.1.17
OpenVPN Client ...local address 192.168.1.2
and make those ^^^ subnets unique...

sniceper
OpenVpn Newbie
Posts: 2
Joined: Wed Jul 19, 2017 7:51 pm

Re: Can't perform RDP connection between server and peer (No Firewall)

Post by sniceper » Thu Jul 20, 2017 10:34 am

OK I'll try to change the subnet for one of the two networks, and Push the server side subnet with push command on Config file.

I keep you in touch. Thank you very much.

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