Questions about using a router/networking, e.g. port forwarding, VPNs

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114 views

Linux routing table entry disappears

I run Fedora 20 (Linux 3.13.3-201.fc20.i686) inside VirtualBox on a Windows 7 SP1 host. The Ethernet adapter on the guest is configured as a Bridged Adapter in VBox, and gets an IP via DHCP. Here's ...
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100 views

multiple ipv4 addresses with internet connection on single physical device

my isp gives me up to two ipv4 addresses. i have a raspberry pi with archlinux connected to the modem. first interface is eth0 and the ip address is obtained via dhcp. i created a virtual device with ...
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630 views

Tunneling traffic through OpenVPN

Following the steps described here I've managed to configure both the VPN server and client(I can ping both ways). Their respective configuration files are: server: ;local a.b.c.d port 1194 ;proto ...
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115 views

BindIPEndPointDelegate to select VPN interface on Windows

I have multiple Windows-intergated L2TP VPN connections on my server. By default, all internet traffic should be routed through my local network adapter and not through the VPN. My application should ...
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120 views

ARP for a multihomed machine (Linux)

I try to configure two interfaces on my server to behave as independently as possible on the same medium. However I have some problems with ARP (maybe related to ARP flux). I hope somebody can ...
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273 views

Ping through GRE tunnel discarded between 2 interfaces of a router - Ping does not reach subnet

I have an interesting issue that I hope someone can help with. I am trying to create a GRE tunnel between 2 routers (running Linux Ubuntu 12.04) and pass traffic between 2 subnets trough this tunnel. ...
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68 views

Query an office gateway/router to confirm all routes?

Is it possible to send a 'query' of some sort to a gateway device in an office to see what subnets I have access to? For example, I know that I have access to multiple subnets because we have many ...
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210 views

ESXi connect to external management network from internal VM

My ESXi server has two vSwitches: One has a physical NIC attached which I labelled "external". The other has no NICs attached which I labelled "internal". My external network is in the subnet ...
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117 views

How does UPnP know which IGD to port forward on if there is more than one IGD?

Say I have two IGDs on the same subnet with UPnP enabled. The host is configured to use one as its default gateway. How do UPnP applications know which IGD to port forward on. I don't think they use ...
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1k views

How to troubleshoot routes while trying to forward all traffic through VPN

I've recently set up a LogMeIn Hamachi VPN in Gateway mode. My goal is to forward all internet traffic from my local machine through the VPN. I've been searching for a while now and have only found ...
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118 views

Can I force putty to use some networking interface?

The problem is that I've two networking interfaces one of them does not allow any outbound ssh connection. How can I force putty to use the second network interface so I can connect to a remote host? ...
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343 views

Understanding Linux routes in Proxmox

I have a server and decided to go ahead and practise with Proxmox. This is the network setup I have right now: Two interfaces: eth0 & eth1 (different NICs, both connected to internet) Two ...
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153 views

NAT routing command in windows

Is there any specific command in windows which do the following task: I want to modify the source IP address in the packet whose Destination IP is not in the private LAN, i.e., I have a virtual ...
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6k views

Route table flushed - how to repopulate active table without reboot

I am trying to automate a procedure in our team in which we must flush the routing table on some machines but what I have noticed is that it flushes the active table as well. This table does not ...
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36 views

Route certain programs to different gateways

I own a small network with 15 windows computers, 1 linux server with samba for network storage and 3 aDSL lines of 8Mb/s each. I have set 5 computers in each adsl line. What I want to do, is having ...
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505 views

local routing with openvpn : ping: sendmsg: Operation not permitted

I set up a simple vpn with IP 10.0.0.1 using openvpn --mktun --dev tun1 ip link set tun1 up ip addr add 10.0.0.2/24 dev tun1 and I run a simpletun program on two machines which is ...
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217 views

setting up linux routing table for mutliple wifi connections

I would like to increase the speed when downloading large files on a public hotspot by using both a built-in wifi-adapter (wlan0) and a wifi-usb-stick (wlan1). As bonding wifi-devices does not seem ...
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714 views

Route only some traffic over VPN

I would like only some programs/ports (namely IRC) from my Windows 7 computer to send traffic through a VPN while the other programs (web browsing, FTP, etc) should default to not using the VPN and ...
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1k views

How to route traffic from another network to the internet

I am doing a bit of experimentation with my home network and have the following setup: +---------+ +----------+ +-----------+ +----------+ | Host A |_WiFi_| Router A =1)___(2= ...
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140 views

Comcast gateway parental setting block CIDR IP Range

I'm not sure if this is the right place to ask this, but I am having trouble adding CIDR IP ranges e.g. 206.111.0.0/16 to my Comcast Gateway. I went to Manage Sites and it says: Please Input a valid ...
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282 views

need of loopback route in every host's routing table

it is always said that every host's routing table must have a entry for loop back route as shown below: Destination Gateway Flags Ref Use Interface ----------- ----------- ...
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477 views

iproute nexthop not working - defining multiple default gateways

I have several point to point connections and I’d like to use all of them as default gateways. I saw this link which explains how to do this using load balancing by calling ip route with a next hop ...
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332 views

websocket behind a firewall

I have a computer with a strong CPU and a lot of memory (strongy) running Windows Server 2008 R2, that is blocked by a firewall from any access from the outside world. I have a computer with a weak ...
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906 views

Allow access to internet with DD-WRT OpenVPN in bridging mode

I am having issues with my OpenVPN configuration on DD-WRT. All traffic has to be routed through the tunnel. The DD-WRT device is not directly exposed to the internet, so the firewall is disabled. ...
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67 views

Resetting route via cmd

I have recently encountered problems on Windows 8 with my VPN connection messing us my route settings, and I'm wondering if it is possile to reset the setting to a working state by using route, namely ...
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457 views

PPTP VPN connection disconnecting when accesing an IP over VPN

I have two PC lan behind a router. I am connecting to my company network through a VPN. I was not able to reach an IP, nor access the internet. The VPN connection would be disconnected automatically. ...
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58 views

How does a Benes network work?

How does a Benes network work? If I have a Benes network with 8 nodes on each side, like this one here: . . . how do I know whether or not I take the upper or lower port of a switch in each stage? ...
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92 views

how to Specify which physical interface the VPN interface should use, Windows7

I have two physical interfaces which both have internet connection different from each other, and I have VPN virtual interface. I want to specify for the vpn which physical interface it uses .. how is ...
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265 views

Route problems with OpenVPN through a local Astaro firewall

I am trying to connect to a OpenVPN server on my Windows 7 desktop though my Astaro (ASG) Firewall. I got it setup and can connect just fine but I can't surf the web. I can ping websites like ...
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46 views

Route everything from some VLANs to a tunnel

I've set up a tunnel: $ ip tunnel add mytunnel mode gre remote x.x.x.x local y.y.y.y ttl 255 $ ip link set mytunnel up $ ip address add 172.17.10.2/30 dev mytunnel $ ifconfig mytunnel up Now, I can ...
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133 views

How do I route in to a dynamic network (pptp client)?

I have a Centos 6 server. It is acting as a pptp server. My home router is dialing a pptp connection to the server as a client, and gets an IP. Communication between them is fine, but I want the ...
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361 views

How to route a global url to a local computer on a Fritzbox

I have this Linux server in my LAN, which can be reached from anywhere using dyndns services. So when I am out, I enter myserver.dyndns.org to get to it. When I am at home, I could do that too, but ...
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501 views

Routing table on Linux not respected

I have a very specific problem, building a Linux VPN endpoint (with external VPN Gateway), which should route certain networks over the tunnel, others via default gateway. The Linux VPN should do a ...
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438 views

Routing specific IP/block to VPN and the rest to net_gateway in OpenVPN

VPN is working properly. However, I wanted to route only a specific IP/block to net_vpn and all the rest of the traffic to net_gateway. route 192.168.1.0 255.255.255.0 net_gateway route 10.8.1.0 ...
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154 views

Linux route/IPtables with internal VM network

I am having some trouble figuring this all out. I have Windows 7 [10.10.30.1] ROUTER [eth0=192.168.4.134 eth1=10.10.30.254] Ubuntu [192.168.4.143] I can ping eth0 and eth1 from Win7, and also ...
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716 views

Routing a specific domain or range through a PPTP VPN and all others through direct connection in Windows 7

How can I route .website/ through a PPTP VPN, while keeping all other traffic going through my default connection? I have tried using the Switchy! Chrome extension, but all my traffic is still being ...
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4k views

Cannot delete a route in redhat linux

I have the following entry in a redhat linux machine to reject the private network route: Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.0.0 - ...
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995 views

How to get all traffic in the network to a specific site to be directed through a proxy?

One of the servers in my LAN is running a certain SOCKS proxy, through which I'd like all traffic to example.com, from the entire LAN, to be automatically routed through without any configuration on ...
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908 views

Use Spotify with 2 network connections (1 x LAN, 1 x tethered iPhone)

I have 2 network connections on my PC here at work (1 LAN and 1 over a tethered iPhone). Now I'd like to listen to music using Spotify. Since our firewall is blocking the connection to Spotify's ...
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101 views

Network routing issue

Here is the situation. I've turned server ns1 (a dual-homed linux box) into a router by enabling ip_forwarding on it (echo 1 > /proc/sys/net/ipv4/ip_forward) Server ns1: eth0: 10.10.0.200/24 ...
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439 views

How to route through VPN only for one IP (OSX)?

I've gotta use a VPN as the first in several hoop-jumps into a client system, but this kills all other networking for me, which makes it very hard to get any work done :( I only need to use the VPN ...
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170 views

How do I get my other computer to connect to the internet?

I have a WAN VPN with dynamic IP. I have configured my D-Link DIR-300 router so my computer is now connected to the internet. I want internet also on another computer in the room. Although I've ...
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10 views

How to connect to VPN from Linux and send only part of traffic via it

I have target host, username and password. I can connect in Windows via Cisco AnyConnect. But all traffic goes via that tunnel. Under Linux I used to use Vpnc, but it requires also additional secure ...
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15 views

Which configuration files affect the routing table of a Debian system

As far as I know basic network configuration goes into /etc/network/interfaces and the system generates the routing table from these information. I was also taught that in general ...
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8 views

Passenger issue with Rails routes

I have been tasked with getting a Rails 2.3.14 app running with Phusion Passenger 5.0.7 standalone in FreeBSD 9. Setup is all complete and done, the issue I am facing is Passenger doesn’t seem to ...
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22 views

Route certain traffic through tun0 and some through eth0 based on destination IP

I have the following setup, a linux box with 2 physical interfaces sitting between my modem and my router, on eth0 it is set to DHCP and get an IP from the modem, I then run a DHCP server on eth1 so ...
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20 views

Docker tunnel traffic on specific port via VPN

Not sure if this is docker specific or a general networking question. I'm running a Debian Jessie server with serveral docker containers. My understanding is that docker creates a virtual interface ...
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14 views

Networking, Creating subnets

Am having trouble trying to create a small network for my office. I have two Asus RT-N12 wireless routers, internet connection from an ADSL modem, Windows server 2012r2 which I want to be my domain ...
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32 views

2 Nics setup on CentOS 7

I have problem with 2 NICs when I try to setup new webserver on CentOS 7 ==== My goal ==== I have 2 network cards on server, eth0 (for public ip) and eth1 (for internal ip) My goal is my server can ...
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35 views

How to redirect all traffic from one network interface to another on the same linux host

I am writing testcases for a network switch. This involves sending something on one network card (via the switch) and checking that it is received on another network card. I want to disable all direct ...