Routing (in IP-based networks) is the process of selecting paths in a network along which to send network traffic.

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complex dd-wrt routing setup - is it possible?

I have access to my university's VPN through OpenVPN, and would like to extend it to all the devices at home. I have cable internet, a DD-WRT router, a bunch of clients (mostly Windows), and a ...
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373 views

iptables Port Forwarding — no service with the port

I have setup a network as in the image below: Firewall (FW) running CentOS 6 has two physical interfaces with subinterfaces: eth0:2 — 10.100.1.78/25 eth0:3 — 10.100.1.79/25 eth3 — 192.168.0.21/24 ...
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1answer
14 views

Make a request through vpn interface

I want to be able to make request through a specific network interface, like this: ping -I eth0.1 google.be ping -I eth0.2 google.be This example works on my multihomed OpenWRT router. I now want ...
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Making static routes persist after a reboot

I have two VLANs (default vlan and vlan 5 for voip). I have 2 interfaces, one for each VLAN. My route table looks like this right now: Destination Gateway Genmask Flags Metric ...
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1answer
30 views

Why doesn't Linux remove route from routing table if interface is physically down?

As seen below, Linux(3.7-trunk-686-pae) keeps route to 10.10.12.64/28 in routing table although the interface is physically down: root@kali:~# ip addr show dev eth0 2: eth0: ...
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2answers
576 views

Policy routing with load balanced ppp connections

This my setup using Debian 6.0. 6. It's role is a proxy server and a load balancer using eight 3G modems. Whenever a ppp connection dials it takes over the default gateway which is ok but it also ...
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56 views

Using a VPN client as a VPN gateway

I would like host 1 to use host 2 as a gateway to the remote host 3. I have scoured the web looking for a solution, but it doesn't seem to work for me. VPN client software is ike (shrewSoft VPN) is ...
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2answers
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IP routing to domain

I have a remote device that sends data to an IP address through a specific port. The problem I want to solve is that I need it sends data to a domain, but device only allow set IP addresses. I want ...
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1answer
241 views

Is it possible to prevent eth0 network traffic from accessing eth1 network?

I am not really sure how this is possible but I have a linux(ubuntu 14.04) box with 2 interfaces. eth0 is connected to our lan 192.168.0.* and eth1 is connected to a dlink wifi router on network ...
3
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41 views

Route VPN traffic through different proxies

I want to setup VPN server and route (based on my routing algorithm) all traffic through different proxy servers. Let's say I have one host, with many users, connected to my VPN. I want to route all ...
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1answer
426 views

Skip routing via `lo` interface for outgoing packets

Introduction I have following load balancing configuration: 10.0.1.31 - lb 10.0.1.35 - virtual IP 10.0.1.32 - node1 (tomcat + mysql) 10.0.1.33 - node2 (tomcat + mysql) I'm using keepalived which ...
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Redirect ALL packets from eth1 & eth2 through a SOCKS proxy

Is there a way to redirect all traffic, UDP and TCP, coming to and from eth1 and eth2 through a SOCKS proxy (Tor) which then passes it through eth0? eth0: Internet in - leads to the main router, then ...
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2answers
397 views

How do I route a spare network interface through an SSH tunnel?

I just bought a Raspberry Pi and I am wanting to route an ad hoc wireless network interface fully through an SSH tunnel that was created using another wireless interface. I want to do this so that I ...
2
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0answers
24 views

Default gateway fallback via DHCP configuration

I have a small network, with two routers/Internet connections. I have configured a Raspberry Pi to load balance traffic between these two routers. I would like to have a redundant setup. If one of ...
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1answer
16 views

Always Forward Traffic Out The Interface It Originated On

(This is the original question but my eventual solution was too different from how I originally asked the question so I'm posting as a new question.) Background: I have a VM with three different ...
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1answer
22 views

Iptable forward interfaces for gateway machine

I have two Ethernet interface being configured to use as system gateway ex: eth1: 10.10.1.0 eth2: 10.10.2.0 I want to forward all the packets which are coming to the 10.10.2.0 gateway contacting ...
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1answer
611 views

ICMP gives host an impossible redirect

I am having trouble with forwarding on a system which hosts a few headless VirtualBox VMs. I have not changed anything but the configuration has stopped working. The VMs have IP addresses on their own ...
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19 views

iptables IP address (source and destination IP address) mangling

I tried to understand the concept of iptables mangling part, but somehow failed to understand the IP header manipulative section. For example: Below is the system scenario which I'm trying to ...
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Default iterface/routes metric in Linux

When I run ip route on my Linux machine, I see default via xxx.xxx.xxx.xxx dev eno1 metric 202 I wonder, where this 202 metric is configured and what other ip commands use it.
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1answer
729 views

Routing a LAN through OpenVPN on OpenBSD 5.5

I'm configuring an OpenVPN gateway to allow a LAN access to the internet through the tunnel. The gateway is running OpenBSD 5.5-stable amd64 on the PC Engines APU platform. The LAN contains re1, re2, ...
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1answer
39 views

How to force FreeBSD to assign default router when acquiring IP in DHCP mode?

How to force FreeBSD to assign default router when acquiring IP in DHCP mode? My machines are FreeBSD 8.2-PRERELEASE or RELEASE The NIC (respectively em0 or re0) is set to get a dynamic IP address. ...
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2answers
89 views

Forward port 22 out a particular interface

The situation I'm in is where we have three separate interfaces on a particular machine. Each connected network only allows servers (by network-based routing/firewalling) to only offer particular ...
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1answer
378 views

solaris netstat -rn output clarification

We have couple of servers performing the same function. On some I see following output: Routing Table: IPv4 Destination Gateway Flags Ref Use Interface ...
3
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1answer
2k views

How do I configure OpenVPN as a Gateway client for Witopia?

I have the following setup: Witopia SSL account Synology 409 NAS (with OpenVPN and Apache etc) PS3 Mac Apple AirPort router (configured for NAT) Locked IPT-box (using DHCP and NAT traversing) ...
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what happens if route row in the routing tables is empty

I have routing records which have empty values in 'iface' column (SunOS5.10): Routing Table: IPv4 Destination Gateway Flags Ref Use Interface -------------------- ...
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1answer
23 views

Adding routes for configured virtual IP addresses of different segments

I have configured virtual IP addresses in different segments as below in RHEL box. eth0 - 192.X.X.208/27 eth0:1 - 192.X.X.219/27 eth0:2 - 10.72.X.19/24 eth0:3- 10.72.X.20/24 The problem here is as ...
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375 views

Using source routing (LSRR) - any ideas?

What I want to do is conceptually very simple, but I can't find any information or help about how to go about doing this. Basically, I want to configure my networking to use source routing (LSRR). ...
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33 views

How to bridge a VM to public IP

I wish to to assign the IP from my eth1:2 to a VM; I also have no use of this IP for the host, it would be desirable to be exclusive to the VM. I've ended up with a setup just like this (eth1:1, ...
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1answer
36 views

Assymetric routing problems in LINUX

Assymetric routing problems are driving me crazy! I am trying to build a multi-homed server with 3 NICs. Each NIC is connected to 3 different subnets: eth0: LAN connected, 10.99.72.38; function: ...
2
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3answers
107 views

Bridge/Router with custom logic

I've a Linux box with 3 network adapaters, which I'd like to configure as follow: Adapter A is connected to computer A Adapter B is connected to computer B Adapter C is connected to the Internet. ...
2
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2answers
576 views

Having trouble with packets not making it into Fedora 16 Apache [closed]

Background: I haven't done anything with iptables in a few years... I have Fedora 16 running in a VM on VMWare, with my firewall (TomatoUSB) port forwarding to the VM. VM is at 192.168.1.155. I know ...
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Is legacy checkpoint endpoint blocking puppy 528 wireless Internet connection and how can I remove it?

Background: Whilst booting with an old flash drive (SafeXs by block master) plugged in to my laptop (DELL latitude 6430u) I came up against a blue login screen . At full encryption point ... ...
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how to binding each each interface to a seperate VPN config

What I am trying to do is route all traffic that comes on a given interface to a specific, per interface, VPN connection where all outbound traffic is actually leaving on WAN0. I frankly don't have a ...
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Network connectivity trouble to non-routing multi-homed hosts?

I have two networks: A and B (172.16.2.0/24 and 172.17.2.0/24). A is Ethernet, B is WiFi. An OpenWRT router connects A and B, and most traffic gets passed OK. Default route on router leads to a ...
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How to find out which interface am I using for connecting to the internet?

I have eth0 and wlan0 according to ifconfig and I can ping google.com. How can I find out (with a normal user, not root) what interface is active, as in, what interface did the ping (or whatever, ping ...
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Egress packets do not use non-default routing table

I made a custom routing table named test: # ip route show table test default via 10.10.10.126 dev eth0 # As seen above, it contains only a single route. As a next step, I made a rule where traffic ...
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70 views

Setting up a 802.11s mesh network for mobile devices to communicate with a wired server

I'm in the process of developing an android app that maintains a device's connectivity to a linux-based WiFi mesh network, and periodically sends status information (GPS, battery life, etc.) to a ...
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1answer
699 views

FreeBSD and StrongSwan routing issue

Good day, gentlemen. I have recently faced a problem when a device connected to the FreeBSD server via StrongSwan can't route outside its subnet. Let me explain in details: FreeBSD 10.0-RELEASE, ...
0
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1answer
60 views

Which path are the packets taking?

I have set up a host-only network in VirtualBox. Windows Host: VirtualBox Host-Only Network IPv4 Address. . . . . . . . . . . : 192.168.56.1 Wireless LAN Adapter Wireless Network Connection 2 ...
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72 views

How can I connect to a local computer behind a router with the router's IP address?

I am trying to set up an IPA server to be used from machines that share the same network as the server and machines that don't. The router's IP address is 12.34.56.78 I am using port forwarding on ...
4
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1answer
1k views

Routing public ipv6 traffic through openvpn tunnel

What I'm trying to do is to route IPv6 traffic through a vpn tunnel. That way, I should be able to use IPv6 in a network that doesn't support IPv6. I have a VPS which has an IPv6 block assigned. Part ...
3
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1answer
230 views

Creating a private network for internal VMs

I am trying to configure a private network for use with my Xen VMs, in addition to the public network in use by another of the VMs (VM1, which has its own public IP). So far, I have the public side ...
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What is the point of the second route lookup after OUTPUT?

According to the packet path diagram, and its description: Table 6-2. Source local host (our own machine) [...] Routing decision, since the previous mangle and nat changes may have ...
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1answer
41 views

Where did pand go?

Most guides on setting up a Bluetooth access point use a program named "pand" to do so. Seemingly, this program was dropped in bluez5. How can PAN be set up without it?
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1answer
251 views

Forwarding packets from loopback interface with policy-based routing

I have the following iptables rule: iptables -t mangle -A PREROUTING -p udp -m udp --dport 10000 -j MARK --set-xmark 0x4/0xffffffff which sets fwmark 4 on all udp packets with destination port ...
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1answer
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Route OpenVPN clients to another different OpenVPN server

I have this scenario.. Server(Primary) with a multiple OpenVPN connections (so server is connected as a client to multiple OpenVPN servers.. lets say secondary servers) This server runs OpenVPN ...
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3answers
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scp between two servers not in the same network

There are two server that I can access with 2 different VPN connections. I have managed to have both VPN working on the same time on my machine (a bit of routing rules). I want to do a scp ...
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2answers
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Gateway with colliding networks

I have an Ubuntu-box as a gateway with two interfaces. The first one (eth0) is the internal network and has the following address: eth0: 192.168.1.1/24 The second one is connected to a router from ...
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57 views

VNC connection times out

I have a VNC server running on a box but can't connect to it over the internet and I don't know why. Here's what I have: on server $ ps ax | grep Xvnc 21304 ? S 0:00 Xvnc4 :1 -desktop ...
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1answer
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iptables routing incoming IP to another destination IP question

I have a test setup: server1:1.1.1.1 server2:2.2.2.2 client: 3.3.3.3 I'm trying to have client IP 3.3.3.3 do a HTTP request from the 1.1.1.1 server. However I want the 1.1.1.1 server to pass this ...