Vpn works no internet acess

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7pane
OpenVpn Newbie
Posts: 4
Joined: Sat Aug 12, 2017 8:29 pm

Vpn works no internet acess

Post by 7pane » Wed Aug 16, 2017 3:19 am

I got openvpn tunnel setup and working. I can connect and dhcp works, everything is assigned correctly. I can ping and ssh into the server, but cannot access the internet. No traffic goes out. I assume I have an issue with iptables, I am running debian on the server. My iptables is configured as follows

iptables -t nat -A POSTROUTING -s 10.192.168.0/24 -o venet0 -j MASQUERADE
iptables -F FORWARD
iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -s 10.192.168.0/24 -j ACCEPT
iptables -A FORWARD -j DROP

Anything obviously wrong or missing?

KydeX
OpenVpn Newbie
Posts: 2
Joined: Wed Aug 16, 2017 5:29 pm

Re: Vpn works no internet acess

Post by KydeX » Wed Aug 16, 2017 5:35 pm

Hi.

I can't really tell you what to do. I am actually having probably some of the same issue, but I felt it is dumb to add another thread with the exact same thing?

Anyway, I have a Windows 10 computer running the OVPN Server behind a Mikrotik Router. I can ping the server at 10.8.0.1 and I can VNC into it. But I don't get an internet connection, and I cannot ping the server LAN side or anything but the server IP itself. I've tried a bunch of guides without any luck. I've forwarded the port 1194 to the correct LAN address through the router. I've created a static route from server IP range to LAN IP range. I've enabled IP forwarding on the Windows 10 machine, and I have disabled firewall for the TAP Adapter. I am really scratching my head now.

Server settings:

port 1194
proto udp
dev tun
ca "C:\\Programfiler\\OpenVPN\\config\\ca.crt"
cert "C:\\Programfiler\\OpenVPN\\config\\server.crt"
key "C:\\Programfiler\\OpenVPN\\config\\server.key" # This file should be kept secret
dh "C:\\Programfiler\\OpenVPN\\config\\dh4096.pem"
topology subnet
server 10.8.0.0 255.255.255.0
push "route 192.168.1.0 255.255.255.0"
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 192.168.1.1"
cipher AES-256-CBC
persist-key
persist-tun
status openvpn-status.log
verb 3
explicit-exit-notify 1

Client Settings:


client
dev tun
proto udp
remote XX.XXX.XX.XXX 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca "C:\\Program Files\\OpenVPN\\config\\ca.crt"
cert "C:\\Program Files\\OpenVPN\\config\\Client.crt"
key "C:\\Program Files\\OpenVPN\\config\\Client.key"
remote-cert-tls server
cipher AES-256-CBC
verb 3

KydeX
OpenVpn Newbie
Posts: 2
Joined: Wed Aug 16, 2017 5:29 pm

Re: Vpn works no internet acess

Post by KydeX » Wed Aug 16, 2017 7:31 pm

Ok, I figured it out on my server. It turns out I had enabled IP forwarding on my Win10 machine, but I hadn't rebooted it afterwards. So a simple reboot fixed the problem...

7pane
OpenVpn Newbie
Posts: 4
Joined: Sat Aug 12, 2017 8:29 pm

Re: Vpn works no internet acess

Post by 7pane » Fri Aug 18, 2017 3:34 am

I figured mine out as well. vnet0 was in the guide but after looking, my server wasn't virtualized that way, it was just eth0. Now if can just get upnp to work I will be in business.

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