Ubuntu Networking :: NetworkManager Redirecting All Traffic Over OpenVPN?

Jan 16, 2011

I got it set up in the NetworkManager applet (imported the client.ovpn), but when I connect it sends ALL my traffic through the VPN. I would prefer all accesses to the internet go over my normal default gateway, rather then all the way through to the VPN's default gateway.When I connect through the command line:

Code:
openvpn --config client.ovpn
I don't have this problem, and accesses to the internet still go over my default gateway on

[code]...

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Networking :: IPTables - Redirecting Web Traffic To Single Transparent Proxy Server

Mar 25, 2010

I am new to iptables. We have two Squid proxy servers running in "non-transparent mode" (172.16.0.1 and 172.16.0.2). Currently users have to configure the proxy server they want to use by configuring them in their browsers. Recently I saw an example for redirecting web traffic to a single transparent proxy server.

-A PREROUTING -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128
-A PREROUTING -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 3128

Can anyone modify this rule to accommodate my current setup of two proxy servers running in non-transparent mode. i.e Redirect web traffic to the 172.16.0.1-172.16.0.2 ip range.

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Ubuntu Networking :: OpenVPN For Some Traffic, But Not All?

Mar 1, 2011

I have access to a VPN I use when having confidential instant messaging sessions. For the purposes of my work, essentially.I'm a command line kind of guy, and like to use Finch (the shell version of Pidgin) for those.However, when I turn on my OpenVPN connection it routes all traffic through the VPN. Web-browsing, IMing, and I can no longer access other machines on my home network.Can I set OpenVPN to only route traffic I ask through that connection (either by port number or application, or some way I haven't thought of), while other traffic flows through my usual home network?Some kind of local proxy perhaps? Or a dd-wrt box set up as a proxy, connected to OpenVPN?I've played around with the GUI environment too (I have a basic GUI I sometimes use on my main machine) and have installed the full desktop 10.10 on a second machine just to see if I can work it out.

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Networking :: F14 NetworkManager To Autoconnect OpenVPN At Startup?

Jul 5, 2011

I have a Fedora 14 machine, and I have an OpenVPN CentOS 5.5 server installed and running without issues.I've setup the Fedora machine to connect as a client to the server, and all goes pretty well using NetworkManager.What I'm not able to do is getting NetworkManager to autoconnect to the server upon user login. I have the "Auto Connect" marked, but nothing happens at boot/login.

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Ubuntu Networking :: OpenVPN Works, But No Traffic?

Aug 31, 2010

I'm facing a problem when I establish VPN connections using OpenVPN to Your Freedom Server. " you can see their documentation here ", I've installed OpenVPN from synaptic and I used the client to connect through VPN and it works !! but there is no traffic in FF or any application !!I tired to insert some HTTP proxy also belongs to the same server and it works. What really wonders me is that OpenVPN seems to work only when I'm connecting to streams sites "e.g. ustream, justin.tv" Is there anyway to force the whole traffic to use OpenVPN " I'm using Mobile modem and it works fine with OpenVPN in win7

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Ubuntu Networking :: Openvpn Through Networkmanager Doesn't Connect On Lucid

Jul 27, 2010

i have added a vpn connection on my Lucid desktop machine, but every time i try and connect, it fails. I also have the same, identical vpn connection on my karmic install on my laptop. everything works perfectly on Karmic, but Lucid is having problems. I have followed identical steps for creating the vpn connection on both machines: vpn connections can be made in 2 ways, the first is through the network manager, but trying to connect through the nm-applet returns an error about vpn failing to connect and "no valid vpn secrets".

I suspect this is at the root of the problem. The only way for my Lucid machine to successfully connect through the command line is if I run the openvpn command under sudo.

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Networking :: OpenVPN Connects But There Is No Traffic?

Dec 10, 2010

I have installed OpenVPN to use it as an internet gateway butcan't get it to work.OpenVPN installed without any problem. The client can also connect and ping the server but there is no internet traffic.I think it is because of a wrong gateway address which the client gets but I'm not sure. server IP address is 10.8.0.1 and the client can ping this IP but it's default gateway is always 10.8.0.5 which is not accessible from the client.This is my server.conf:

Code:
dev tun
proto tcp

[code]...

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Ubuntu Networking :: Gray - Apply - Button In NetworkManager Openvpn Connection Window

Nov 19, 2010

I installed all the necessary packages for the networkmanager-openvpn function to function. The openvpn-connection-setting are successfully imported into the networkmanger via the conf file but the apply button is grayed out, so that actually saving and using the connection isn't possible? Does anyone know, where the problem is? It's a fresh install of Ubuntu 10.10 after the upgrade from 10.04 sent the networkmanger down the drain.

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Networking :: Can OpenVPN Be Used To Hide Or Encrypt Internet Traffic?

Aug 31, 2010

I have some questions about openVPN. I am wanting to hide my downloading through transmission and I'd like to know if I can use openVPN for this? Also do I need access to a server? I don't understand how it all works.

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Ubuntu Networking :: OpenVPN Works Fine, But Can't Filter Traffic Between Users?

May 13, 2011

I'm using ubuntu server 10.04 with openvpn installed on it. My vpn is working fine, all the users can connect without any issue.My problem is that I'm unable to filter the VPN traffic using openvpn. I can't allow all users to be able to interact with other vpn users. I need to avoid this kind of traffic.I was trying to build an iptables firewall, but I just noticed that my openvpn traffic isn't being filtered by iptables.In FORWARD chain, no matter what rule I use openvpn would continue to allow traffic between my clients. It does appear that openvpn is skipping FORWARD chain?For example:

Code:
# iptables -L FORWARD -nv
Chain FORWARD (policy DROP 0 packets, 0 bytes)

[code]....

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Fedora Networking :: OpenVPN Timeout - Error From NetworkManager - Connect To My Router/firewall

Mar 13, 2011

I'm getting a timeout error from NetworkManager when attempting to connect to my router/firewall.

Excerpt from /var/log/messages attached.

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Debian Configuration :: Redirecting Traffic Through SOCKS Proxy?

Aug 11, 2010

I would like to redirect traffic coming from a machine A through a SOCKS proxy (setted on machine B)Machine B run "ssh -D 4242". So that create a SOCKS proxy on machine B.Machine A would like to connect on the internet, but the only way is to use machine B SOCKS proxy. The problem is machine A don't know how to use SOCKS Proxy. (Actually, i can just set ip, netmask and gateway on machine A).So, I would like to set up something on machine B that will redirect all traffic coming from machine A throught the SOCKS proxy.

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Fedora Networking :: Unable To Start An Openvpn-connection Via The "nmcli"-command To Control NetworkManager

Jun 4, 2011

As I reported in this bug:[URL].. root is not able to start an openvpn-connection via the "nmcli"-command to control NetworkManager, whereas my user does not run in any problems with this command. My error output when starting as root is as follows:

Code:
# nmcli con up id "my-openvpn"
Active connection state: unknown
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/5
state: VPN connecting (need authentication) (2)
Error: Connection activation failed: no valid VPN secrets.

Does anybody know what to do about this strange behaviour? The vpn-secret seems to be stored in the gnome-keyring and in the /etc/NetworkManager/system-connections/my-openvpn simultaneously. But root cannot access any of these. Why this is important? I'm trying to set up a dispatcher-script to automatically start openvpn on eth-connection. but this does throw the exact error from above (no valid vpn secrets..).

[Code]...

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General :: How To Connect To OpenVPN With NetworkManager

Mar 7, 2011

I have installed an OpenVPN server on my OpenWrt 10.03 router [freshly flashed]:

[URL]

It seems "ok".

I connect my pc to the lan port of the router, and i want to try it out. I'm using Fedora 14 with GNOME. In the NetworkManager applet i set these things: this and this. Ok!. i try to connect, but it fails. Here are the logs: [URL]

one important thing: my routers [the one with the openvpn server] ip address is 192.168.1.2, and i didn't had to write it nowhere. so how could the networkmanager applet know the ip address of my openvpn server? i think this is the problem, but i just can't find where to write 192.168.1.2

p.s.: yes, i tried to google for: "No server certificate verification method has been enabled." but i didn't find a thing, and i'm trying for hours now... :

p.s.: if i [on the router]:
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

[Code]....

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Debian Configuration :: Traffic Bypasses OpenVPN

Sep 16, 2015

I'm running OpenVPN service on both debian server and client. When start connection between client and server, I expect all the computer traffic (except ARP and DHCP requests) go through created tunnel. However, when I capture packets on wlan0 on client (the only connection going outside host) using Wireshark, I can see DNS requests visible and sometimes incoming TCP traffic as well, but most of the traffic is going through tunnel as expected. I provide both configurations of client and server and client routing table for inspection. I changed server address to avoid server exploitation in the case of some big configuration mistake.

Commands to run OpenVPN services are:
Code: Select allFor client: sudo openvpn --config /etc/openvpn/client.conf &
For server: sudo openvpn --config /etc/openvpn/server.conf &

**Client routing table when VPN is OFF**
Code: Select allKernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.1.1     0.0.0.0         UG    1024   0        0 wlan0
192.168.1.0     *               255.255.255.0   U     0      0        0 wlan0

[code]...

I searched through many forums and documentation and I found, that for all the traffic going via VPN is command: *push "redirect-gateway def1"* neccessary, however, I have leaks despite this command being in place. I already spent over 2 days with this and tried to configure it in many ways, now I have no clue what I'm missing.

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Ubuntu Servers :: Setting Up A Bridge For OpenVPN / Tunnel All The Traffic Through The VPS?

Feb 3, 2011

I have an Ubuntu VPS running 10.10 x86_64

This is what is in my /etc/network/interfaces right now.

Code:
auto eth0
iface eth0 inet static
address 67.202.x.x
gateway 67.202.x.1
netmask 255.255.255.0
auto lo
iface lo inet loopback
My server.conf
code....

I can get the VPN server running and everything connects fine from the client. I just don't know how to tunnel all the traffic through the VPS because it involves making the bridge which I'm having trouble with. What exactly am I supposed to put in /etc/network/interfaces?

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General :: Redirect Incoming Traffic To An Other Port (ubuntu Openvpn Server)?

Dec 5, 2010

I have set up an openvpn server on ubuntu via port tcp 443. The server use a public network and almost every ports are blocked (not 443) So when a client connect to the server, if it send traffic needing a blocked port, the connection cannot been etablished of course. So i d like to know if it is possible to redirect all incoming traffic on the server to an other unblocked port (like 443) to bypass firewall.

I dont think openvpn offer this possibility but maybe with linux it is possible..

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OpenSUSE Network :: SUSEFirewall Blocking OpenVPN Traffic - How Can Configure To Allow

Nov 17, 2010

I have a remote network that I manage consisting of a DLink DFL-210 firewall/router, and behind that a Dell server running openSUSE 11.2 and a collection of Windows XP/Vista/7 computers.

The Linux box is running OpenVPN as a server (that is how I connect to this network) and a client (it connects to a second server - running XP - at a different location).

The DLink router is the DHCP server and provides addresses on the 192.168.51.0/24 network. The OpenVPN server provides the 10.8.51.0/24 address range.

The remote network that the Linux box connects to is 192.168.54.0/24 via the OpenVPN network 10.8.54.0/24.

I have added routes to the DLink router to route all traffic to the 10.8.51.0/24 and 192.168.54.0/24 networks to the Linux box.

With SUSEFirewall turned off, after I have connected via OpenVPN from my remote computer I can ping all active 192.168.51.0/24 addresses. Other computers on the 192.168.51.0/24 network can ping computers on the 192.168.54.0/24 network. But if I turn on SUSEFirewall, neither of these work. However, I can ping 10.8.54.1 from any computer on the 192.168.51.0/24 network.

How can I set up SUSEFirewall to allow these networks to communicate with eachother?

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Ubuntu Networking :: Network-manager-openvpn And Static-key OpenVPN Connection In 9.10

Apr 5, 2010

i have some problems with configuring openvpn tunnel connection to my openvpn server. I'm using static-key tcp connection. Network manager always said to me that connection could not be established. Also, when i try to run openvpn from terminal, i got some strange permissions problem:

Code:

openvpn --config config.ovpn
Mon Apr 5 15:48:37 2010 OpenVPN 2.1_rc19 i486-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] built on Oct 13 2009
Mon Apr 5 15:48:37 2010 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Mon Apr 5 15:48:37 2010 /usr/sbin/openvpn-vulnkey -q moj.key

[code]....

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CentOS 5 Networking :: Configure Firewall - Allow And Forward All Traffic On Eth0 And Block All Traffic On Eth1 Except Ssh Ping

Sep 29, 2010

I need to set up my centOS computer as a firewall in my home network. Ive got 2 interfaces, eth0 and eth1. I want to allow and forward all traffic on eth0 and block all traffic on eth1 except ssh, ping(icmp) and DNS. How do I do this? Ive tried some editing in /etc/sysconfig/iptables but no luck.

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Networking :: Server To Block All Traffic But US Only Traffic?

Mar 15, 2011

I wanted to tell my server to block all traffic but US only traffic. So i followed this guide:[URL].. Now I know, it's the best way to help prevent hackers/crackers (doesn't matter to me what they are called. I just have to stop them). My server only deals with US clients anyways so might as well just start right there for my server's security before getting into the brute force and injection preventions. So I got it all done compiled everything moved to the proper directory. I then started to setup my iptables. Like so

Code: iptables -F INPUT
iptables -F OUTPUT
iptables -I INPUT 1 -s *.*.*.* -p tcp --dport 22 -j ACCEPT
iptables -I INPUT 2 -s *.*.*.* -p tcp -j ACCEPT

[Code]...

After seeing that i went digging in the code and figured it was something todo with memory allocation.

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Server :: PPTP Traffic - Gre Traffic Is Being Generated During The Browsing / Reduce Traffic

Sep 27, 2009

Recently I notice that when I'm connected to an vpn server (pptpd) and I'm using it as a default gateway my download and upload speed decreases almost to the half of the usual speed. I made a test using iptables in order to count how much GRE packets are generated (except the real traffic itself) in that way:

Code:
iptables -I INPUT -p gre -j ACCEPT
iptables -I OUTPUT -p gre -j ACCEPT

iptables -I FORWARD -s 172.16.10.101 -j ACCEPT
iptables -I FORWARD -d 172.16.10.101 -j ACCEPT
The first 2 rules match all GRE packets between the pptpd server and client, and the next rules - the traffic between the server and the client.

When I turn the counters to zero and begin to generate traffic (to browse, to download etc.) I see that the GRE packets are even more than these in the FORWARD chain.

So, my question is first of all is my test correct and is it true that so much gre traffic is being generated during the browsing (it becames clear that the traffic is double than if the pptpd wasn't used as a gateway) and if yes - can that traffic be reduced?

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Networking :: Packet Redirecting To Another Interface Of The Box

Nov 19, 2010

I have to interfaces eth0(10.0.0.7) and wlan1(10.0.0.8) in my box. An application is listening (say, udp socket) at 10.0.0.7:5888.

Now if someone sends packet at 10.0.0.8:5888, I want to forward them to 10.0.0.7:5888.

I have tried this - iptables -t nat -A PREROUTING -p udp --dport 5888 -d 10.0.0.8 -j DNAT --to-destination 10.0.0.7

But Packets(with destination addr 10.0.0.8) are not received by the application (But they are received by the box, I have checked using wireshark). I have also enabled ip_forwarding.

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Networking :: Redirecting Ssl Requests With Squid?

Feb 24, 2010

say i have an apache server configured for ssl/non ssl virtual hosts and a proxy configured as follows (see squid.conf)the ssl on each name based virtual host is configured on its own port (only 7 of the domains need this the rest are just media and other insignificant bits of data but domains 1-7 contain forms that require specific personal information that may be technically illegal to transmit without encryption)if any additional information is needed just let me know

domain1 is port 443
domain2 is port 444
domain3 is port 445

[code]....

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Networking :: Iptables REDIRECTing - All Outgoing Packets ?

Dec 6, 2010

I've been trying to redirect all outgoing packets (destined for a specified ip address) from my slack box back to itself. I thought this could be done with iptables, but if I fire up wireshark I can clearly see that the packets are getting out to the real server and I'm getting responses from it.

So here's what I tried:

All looks good and fine, and then I even try to visit 194.28.157.42 with firefox (by the way I am running a webserver, that is set to show a page when you visit 127.0.0.1) and I get an error page that reads: 502 Bad Gateway.

I ignored this message to see what the program I'm trying to interrupt does, and when I start wireshark and then start the program that is using that website, I can clearly see that the packets make it to the real 194.28.157.42 and get back responses.

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Networking :: Redirecting Packets To Virtual Machine With Iptables

Mar 16, 2011

I had been running my SMTP server with WINE, as the SMTP server software is a Windows-based program (MERCURY), but I cracked the shits with WINE and removed it. Now I am running my SMTP server in a Windows virtual machine.This virtual machine has a different IP address from my host machine, so what I need is for my computer (the host) to redirect incoming traffic on port 25 to the virtual machine at 192.168.56.101 on port 2525.Can someone please help me with it? I think its done with iptables.

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Fedora :: Openvpn Certificate \ Installed Openvpn And Config It For A Tunnel?

Aug 9, 2010

i have installed openvpn and config it for a tunnel. my server.conf and client,conf is as follow:

server.conf
port 1194
proto udp

[code]...

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Server :: OpenVPN Range Address / When Change Static IP To Dynamic IP In Config File OpenVPN Didn't Work?

Feb 13, 2010

I want to configure a VPN over the Internet.I installed the 'openvpn' package, generated the key file, transfered it by a secure way to the client, and setted up the configuration file.

So, in that configuration file I input the IP addresses of the tunneled interfaces. Both IPs are static in the tunnel.

Then, I've heard somewhere that I can assign a dynamic configuration IP for the client. I do this registering a range.

Well, when I tried to change static IP to dynamic IP (changing '192.168.0.2' to '192.168.0.0/24') in the configuration file, the OpenVPN didn't work.

Obviously I don't know what I'm doing, and I really, don't believe that simply changing the IP will make it work, but I tried.

I hope I explained my problem as well.

My configuration file:

# OpenVPN Server Configuration File
dev tun 0
ifconfig 192.168.0.1 192.168.0.2
cd /etc/openvpn
secret key_file

In client I execute the 'openvpn' without the '--daemon' parameter.Then I want that my client uses a IP in a range (192.168.0.0/24, for example), instead of a static IP (192.168.0.2).I also thought to use a DHCP server, but I'm not sure that will work.

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Ubuntu :: Internet Traffic Flow Monitor - Track Traffic Of Each Device

Apr 27, 2010

We have something on our network that is reaking havoc with our content filter. I am trying to track it down, but so far I have been unsuccessful. We have approximately 500 devices in 100+ different locations spread across 9 states. Looking at each computer is not really feasible.

I need a machine that can sit in between our network and our internet connection and graphically monitor in real time and logs how much traffic each device is sending and receiving. It would need to sit inline so it has to have two nics and be able to pass traffic. The machine also needs to be transparent. Reconfiguration of our routers or workstations is not an option.

I have used ethereal and wireshark before. Ethereal may be a viable option, but wireshark seems to provide lots of information, but no practical way to make use of it. how to set up the box to be a transparent device on the network that will allow internet bound traffic to flow (freely)?

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Ubuntu Networking :: Broken Networking After OpenVPN Configuration Attempt?

Jul 13, 2011

I have been trying to set up openVPN on a Virtual Machine running Ubuntu 10.04 with the eventual intention of having a closed VPN in the workspace I'm at, and a bridged internet connection out through the server.My initial process/instinct was to go through Webmin. After a fair bit of tooling around making eys/certificates, I was able to get a response (and that's all it was, really) from my windows machine accessing the VPN server. However, in my attempt to bridge the network, I have lost all internet/networking capabilities from the server.Fortunately I am able to access the server directly from the hardware underneath (i.e. I don't need to SSH in or anything), and so I've been attempting to restore the server's networking back to default. I have returned the /etc/network/interfaces file to it's original state (just the loop, and an eth0 on dhcp) and restarted the networking. A check with ifconfig returns what seems to be a working eth0, and the loop (noting else) however I am unable to ping any outside server. When I do, I am given the message:From XXX.XXX.XXX.XXX icmp_seq=1 Destination Host Unreachable(where of course XXX is my IP address).nother VM on the server is able to access the internet just fine, so it's not the overall server hardware...I guess at this point I'm just trying to take steps back,

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