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

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3
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1answer
202 views

How can I tell if my multiple network interfaces are working ok?

On Ubuntu 14.04 x86-64 I have a wireless broadband connection and a USB tethered one (it's on 4G, not the same wireless): route -n Kernel IP routing table Destination Gateway Genmask ...
2
votes
2answers
7k views

Setting VPN to go through certain IPs and not others

I'm a scientific programmer with a loose grasp of what goes on under the hood in my small home network so bear with me whilst I try and explain using the correct words if possible. My home network of ...
2
votes
6answers
7k views

VMWare Workstation: How to access the virtual disk from the host system?

I would like to access the disk of a VM from host or even better from LAN. The VM runs a Windows XP. The easiest way would be an access to the c$ share. Peace, Ice Update: Upon the several answers ...
2
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3answers
3k views

How to link two routers LAN to WAN

My former modem was replaced by a all-in-one modem/router (10.1.9.1/24) after a speed upgrade. I still have my DD-WRT router (10.1.10.1/24), which I want to be my main router, i. e. as DHCP server, ...
2
votes
1answer
1k views

How to route specific traffic through OpenVPN?

I'm running a server at home with rtorrent and apache2. I would like to route my rtorrent traffic via OpenVPN and since im kinda new to OpenVPN and iptables i would like to have a user friendly guide. ...
2
votes
3answers
903 views

Avoid corporate blocked URL's when on Cisco VPN

When I'm on my home PC and on my company VPN I can't get to sites that my company blocks. Is there a way to get around this? Why do my requests to facebook.com go through the VPN? Can you configure ...
2
votes
3answers
34k views

Why does this ROUTE ADD command fail?

I am trying to block access to a single IP address by adding a specific route that leads "nowhere" (instead of the default gateway): route ADD 199.239.136.200 MASK 255.255.255.255 127.0.0.1 METRIC 10 ...
1
vote
3answers
2k views

How to find the IP address of a router

I live in a dorm where many students have setup small wireless networks. There are two of this networks that are very close to my room as the signal is very strong. Our college uses DHCP to assign IP ...
1
vote
1answer
280 views

Can I avoid losing three IPs per network on a bridged Xen networking setup?

About a month ago, I asked this question on Superuser. The answer given there certainly works, but I've run into an issue I haven't thought of before. The setup I had running (based on the previously ...
1
vote
1answer
1k views

Network routing with an ADSL router and two wifi routers

Ok so here's my network setup - ADSL Router (non wifi) -> Wireless N Router (with LAN switch as well) -> Desktop | Wireless G ...
1
vote
1answer
933 views

What routes must be set (in Linux) to allow Internet access through given interface without setting it default?

I am trying to solve a task with routing and OpenVPN's configuration. After setting the connection, I don't want it to become defaut route to anything, but rather want to use its interface for this ...
1
vote
1answer
565 views

Remote SSH access doesn't work when OpenVPN client is enabled on DD-WRT

I have a DD-WRT router which I would like access remotely via SSH. The DD-WRT is behind an ADSL router which has port forwarding for port 22 enabled, DD-WRT SSH access and service are set to port 22, ...
0
votes
1answer
1k views

VPN on SSID #2 (OpenWRT)

I am a new at openwrt (attitude adjustment - TP-Link WDR3600), I am trying to get an OpenVPN On Dedicated Wireless Access Point (VAP). Let me show you what I'm trying to do here with visuals: SSID ...
0
votes
1answer
2k views

Route LAN traffic through eth0, not tun0, on my VPN access point

How can I make my Access Point send traffic to 192.168.1.0 through eth0 and all other traffic through tun0? I have set up a Raspberry Pi VPN access point. It sits on the same subnet as all my servers,...
-1
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1answer
409 views

Bind incoming packets to 1 interface and outgoing packets to 2nd interface?

I am have a Linux machine with 2 network interface cards, I need to use one for incoming packets, other for outgoing packets.
5
votes
1answer
10k views

How to allow FORWARDing with firewalld on a Fedora 19 router

I've just installed Fedora 19 and I'm using firewalld instead of iptables, but I'm having difficulty interpretting the new terminology. I have 2 NICs. One is specificed ZONE="internal" and the other "...
4
votes
1answer
642 views

OpenVPN routing issue

Building 1: 10.1.0.0 255.255.0.0 Building 2: 10.10.0.0 255.255.0.0 192.168.0.0 255.255.0.0 Buildings are connected by 1G metro ethernet. I reside in building 1. 192.168.0.0 is firewalled from ...
4
votes
1answer
2k views

What does 0.0.0.0 gateway mean in routing table?

I am new to being a Linux system admin and I am learning about routing tables. Currently I have two interfaces in my virtual machine: vagrant@vagrant-ubuntu-trusty-64:~$ ifconfig eth0 Link ...
4
votes
2answers
6k views

Setting up bridged OpenVPN server with single public IP NIC

I've been trying to set up a bridged OpenVPN server without much success. I've got VPS running Ubuntu with one NIC, which has assigned static public IP to it. I want to be able to have a couple of ...
3
votes
2answers
3k views

How to split two networks for one Internet connection

I have a single Internet connection and I'd like to create two networks to access it. Network #1: WiFi accessible Network #2: Wired, not accessible from Network #1, but can still get to the Internet ...
3
votes
1answer
17k views

How to forward packets between two interfaces?

My laptop (use's Ubuntu 13.10) is connected to internet using a wired connection at eth0 with ip 192.168.42.13 and it also acts as a wifi hotspot at wlan0 with the ip 192.168.1.1 (i used airbase-ng to ...
3
votes
1answer
755 views

How can I prohibit the creation of a route in Windows XP upon connection to Cisco VPN?

Problem I have several routes that are created when I connect to my company's VPN using Cisco VPN client. (It appears to be a bug in our VPN client that we're subjected to this in the first place: ...
3
votes
2answers
1k views

Access machine in a subnetwork after a router

Is it possible to access a machine in a sub network? This is the situation: Main-router + sub-router - machine (2) - machine - machine - ... - machine (1) - machine - machine - ... ...
3
votes
1answer
434 views

Using traffic shaping, is limiting download traffic helpful or harmful?

I use traffic shaping in MonoWall (BSD) to great advantage with my home connection. It has been quite some time since I've had any kind of issues where user interaction with the internet has seen any ...
3
votes
1answer
2k views

Linux: multiple network connections - 3G/4G / Wifi / LAN / etc; how can i set a preferred network connection to use?

I've been looking at how I can setup a laptop that has multiple network interfaces, but a problem exists if all the connections are active, i.e. 3G, WiFi and LAN are all connected, I would like it to ...
2
votes
1answer
500 views

Route internet traffic to isolated vm

I got two VMs, i want VM-2 to be an isolated host, forced to route it's traffic through VM-1. So for example if i use a VPN on VM-1 this will affect VM-2. VM-1: Windows 7, 2 NICs 192.168.1.80 255....
2
votes
2answers
6k views

How to setup a DHCP-Server who serves to different ip-ranges (e.g. 192.168.1.x and 172.16.x.x)

i have linux running and use dhcp3server which manages my ip-addresses in my network. Now i got a zyxel-access-point and want to drive it on a different ip-range than my wired network. Is it possible ...
2
votes
1answer
105 views

How can my home server accept and reply to connections from the Internet when OpenVPN client is running?

I have a headless home server running Ubuntu Server 12.04. A 3rd party website (to which I'm subscribed) periodically sends commands to a daemon on my home server which in turn responds to the 3rd ...
2
votes
0answers
164 views

IP forwarding on windows 7

I want to redirect incoming traffic with a specific IP destination address coming to my computer to proxy server working on this PC (C# app). I tried to accomplish it by using netsh interface ...
2
votes
3answers
8k views

ssh - no route to host

I have 3 machines (A, B and C) behind WLAN Router. From B i can make ssh to A and from A to B also. Ssh between C and A is also working (both destination, C->A and A->C). But when i try to connect B ...
2
votes
0answers
341 views

Can I set up Windows 7 VPN so that only sites blocked in China are routed through VPN?

I'm in China behind the Great Firewall using a VPN service provided by a friend so didn't get blocked in the VPN crackdown in January 2015. Since VPN can slow down traffic a lot I'd like to only ...
2
votes
3answers
12k views

“Destination port unreachable” when pinging computer in another subnet

In my home network, I connect to the Internet through a router (192.168.1.1). I also have another router (192.168.1.15, 192.168.2.1), this one using OpenWRT, configured as a wireless client. One of my ...
2
votes
3answers
8k views

Multiple web servers behind one public IP

Long time reader first time poster (he he). So here's my dilemma. I'm hosting 3 sites at home for some friends, nothing big, all just wordpress sites. Running them in VMWare Workstation. Got a ton of ...
2
votes
2answers
678 views

Force command-line tool to use different interface?

I have a service which I want to run over eth1. But all my other traffic still needs to run over eth0. Is it possible to force a command-line tool or other application to use the non default ...
2
votes
2answers
5k views

Selectively routing traffic via ethernet or wifi, with proper DNS (Mac OS X 10.6)

When I'm at work, I access various intranet pages as well as the wider Internet through ethernet. However, the company LAN blocks some ports (e.g. Google Calendar). I can get to those through WiFi. So,...
1
vote
1answer
247 views

DD-WRT setting to deny communication between wired clients

I've been having trouble connecting between wired devices on my LAN since I switched to a DD-WRT based router (Windows 8.1 cannot connect to one specific device on LAN). My wireless devices can ...
1
vote
2answers
547 views

Can I do policy routing on a virtual interface?

I know it is possible to give multiple IP addresses to the same interface, say eth0. It is also possible to build several virtual interfaces on the same physical NIC, say eth0:1, eth0:2,.... Suppose ...
1
vote
1answer
612 views

OpenVPN without NAT

I'm trying to figure out how to route OpenVPN clients without using NAT/PAT. What I want to do is to route the IP address that they are assigned when clients authenticate to the OpenVPN server to the ...
1
vote
1answer
434 views

How to set route specific interface metrics under Mac OS X

UPDATE: I found a great answer to part of my problem here http://superuser.com/a/525592/169461. I was able to set priority for interface en1 (wifi). However, this is not specific enough, since it will ...
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vote
2answers
2k views

Route all the traffic through my laptop (using Squid) wit Windows

I have just installed Squid on my laptop and I am successfully blocking all the traffic that I want to block ( websites, protocols etc. ). But I would like to route all the traffic form my LAN ( have ...
1
vote
3answers
5k views

Multiple network interfaces on a single NIC in Windows

Here's the scenario: Lets say we have a wireless network that imposes bandwidth limit on IP addresses(ie every IP address has limited bandwidth). To get around this, we can obtain several IP ...
1
vote
1answer
5k views

2 default gateways, one to 0.0.0.0… with DHCP

A problem that I have here with Windows 7 (RTM) and Windows Vista (SP2), on multiple machines, is that clients get a default gateway of the DHCP server (like they should) but on top of that, also a ...
1
vote
2answers
1k views

Debugging IPv6 routing issues

I have been given a native (no tunneling etc) IPv6 /64 block by my ISP. My pfSense router has successfully got an address, and from its WAN interface I can for instance ping ipv6.google.com and get a ...
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1answer
2k views

Debian: Routing Table and Two Interfaces

I've a Debian machine with this network scenario: eth0 - Internet Connection via local Router (172.20.1.x) ppp0 - Dial-up to a network without internet (10.x.x.x) I've set pppd so it won't add ...
0
votes
1answer
423 views

Linux box acting as wireless access point to share the internet connection

A linux machine is connected to internet over two interfaces ppp0 and ppp1 using two modems. Also this machine acts as wireless access point through an interface say, eth0 with ip address 192.168.1.1 ...
0
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1answer
259 views

Redirecting marked packets to Tun device

I have a small program that needs to do various things with a selection of packets, based on various iptable rules. The packets are MARKed this way: iptables -t mangle -d 10.10.0.0/16 -j MARK --set-...
0
votes
1answer
21k views

Routing loop: TTL expired in transit

I 'm trying to ping from my host PC (Windows 7) to Ubuntu 13.04 (VirtualBox). However, I get the error: Pinging 10.0.2.15 with 32 bytes of data: Reply from 78.87.2.210: TTL expired in transit. Reply ...
0
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1answer
36 views

How to configure a intranet router to inform its hosts about routes to other subnets?

It sounds a little bit strange, but the current network configuration is, I have two local networks: 192.168.7.0/24 and 192.168.144.0/24. Their gateways are respectively 192.168.7.1 (R1) and 192.168....
0
votes
1answer
47 views

How to access shared drives of Parent Network

I have a wired network set to static IPs. I have introduced a new wifi router to one of the wire and assigned one of the static IP to the router. Now few persons are directly connected to the wired ...
0
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1answer
26 views

Can not access web domain from local computers

I have a WEBserver IIS7 in my local network. When I go to "www.mydomain.com" from a computer inside same LAN I cant access it. If I put in the local IP it works. "www.mydomain.com" do also works from ...