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1
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1answer
236 views

Routing in computing cluster

I'm trying to set up a computing cluster composed of four nodes. Each node have 2 interfaces p1p1 and p2p1. The first node - head node - should be visible form the outer world. It should route all ...
1
vote
1answer
144 views

Question about routing VMs with static IPs in Ubuntu (Unsolved)

I have a server with an external provider that is running Ubuntu 12.04. The server is having a static IP. I have installed VMware workstation and I am running some virtual machines, one of them is for ...
2
votes
2answers
7k views

openssh server is refusing connections by blocking or resetting

On a quite fresh install of Ubuntu 14.04 (machine1), I have openssh-server with a completely default config. When connecting from machine2 on the LAN, with an empty ~/.ssh, I get the following debug ...
1
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1answer
1k views

Routing table incorrect at startup

Whenever I reboot my Ubuntu server, the routing table is incorrect for the default route. The routing table correctly specifies the LAN IP address 192.168.124.0/24. All other traffic should go through ...
1
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0answers
209 views

When the system resumes the default route is missing [closed]

A notebook running Ubuntu 13.10 (xfce), using wifi, and until recently when I shut the lid down it suspended nicely, and when I opened the lid it resumed, and auto-connected to the wifi. Now it no ...
0
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1answer
299 views

Setting up VMs on different subnets

I run a server on IP X.Y.3.7 and i want to run multiple VMs on it using libvirt. I set up a bridge device: auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address X.Y.3.7 ...
0
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2answers
1k views

Two subnets on one interface

So Im trying to configure a zoneminder video server that connects to ip cameras on the lan but I would like the cameras to be on a different subnet as our office and Im not sure how to accomplish that ...
2
votes
1answer
1k views

OpenStack Neutron outside communication through router doesn't work, local between VMs does

I am pretty lost with this one for few day now and can't move further. Any ideas will be very welcome. My private net for VMs: 10.5.5.0/24 Outside link via 192.168.22.0/24 (my router's IP ...
1
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0answers
408 views

Installing xubuntu-desktop breaks cloud-init (routing to 169.254.169.254)

Run Ubuntu Server 12.04 (or a later version) in a VM. Reboot. Cloud-init continues to work. Then install xubuntu-desktop. Then reboot; you will see that there is now a broken route to the ...
0
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1answer
425 views

Two gateways and two interfaces

I wan't to configure my ubuntu server as shown below. I need the clients in the 192.168.3.0 network to access internet through gateway 192.168.0.14, but at the same time i need 192.168.0.13 router ...
11
votes
2answers
9k views

persist port routing from 80 to 8080

I use amazon EC2 instance which works via ubuntu. By default according security restrictions I can't bin my application to port 80, so I just bind it port 8080 and then set routing redirect from port ...
12
votes
1answer
25k views

How can I make VirtualBox guests share the host's VPN connection?

Question When I start my VPN on my ubuntu desktop computer which acts as a router, the attached subnet loses internet connectivity, but is still accessible (LAN). Ideally, I would like to know how to ...
3
votes
2answers
960 views

Network Manager breaks manual routes

I have Ubuntu 13.10, Saucy Salamander x64 running as a guest in VirtualBox (with Windows 7 as a host). I wrote this /etc/network/interfaces because I need to add a large number of permanent, manual ...
0
votes
2answers
547 views

Connected to VPN but still same IP

I am trying to setup a VPN connection on my machine, Ubuntu 12.04. The steps I did are the following: sudo pptpsetup --create myvpn --server 123.123.123.123 --username vpnuser --encrypt sudo pon ...
0
votes
1answer
559 views

Connect to virtual host from local network

Configured bind9, apache and all related services. Problem is; I am able to connect to my sites from outside, www.mysite.com (example) is ok. In such case my - client IP is different than servers IP. ...
0
votes
1answer
83 views

Interface for my router in Ubuntu

I would like to know if there is a way in which I can create an interface in my Ubuntu 12.04 LTS Desktop for my router. My Goal: I want to tcpdump the ip address of the router which is 192.168.1.1. ...
2
votes
1answer
451 views

help understanding iptables router script and error

Hello I have this routing script that I'm using which runs when all the network interfaces are up: #!/bin/sh PATH=/usr/sbin:/sbin:/bin:/usr/bin # # delete all existing rules. # iptables -F ...
0
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0answers
196 views

Wireless lan connection stops working after 3 pings or after loading one web page

My boss asked me to install Ubuntu 12.04 LTS 32 bit on an old-ish laptop with an external US Robotics Wifi card and an internal ethernet card. I have gone through all the painful hops about installing ...
0
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1answer
158 views

Is my OpenVPN connection doing its job?

My first question is whether or not my openvpn connection is working as it is supposed to (routing all network traffic via the tun0 interface). When I type netstat -rn I get the following: $ netstat ...
4
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0answers
3k views

Integration multiple internet connections ISPUnity vs Ubuntu Bonding

I have Ubuntu 13.04 with 2 ethernet cards and a WiFi card. I also have 3 ISP connections. I have to configure linux to use all 3 connections. My main concern is to increase outgoing bandwidth (FTP ...
0
votes
1answer
244 views

How does a computer decide which network interface to send traffic to?

I have a computer (Ubuntu) with one wired and one wireless network interface. The wired one is statically assigned and connected to another single machine with a statically assigned address. The ...
0
votes
1answer
1k views

Add a virtual interface to the same subnet and route both

What I am trying to accomplish is extremely close to this, with one twist. I want the second "nic" to be a second ip address (I guess sometimes called a virtual nic), added to the same physical nic ...
0
votes
1answer
3k views

Forwarding multicast packets in wired-wireless-nat-router

I am receiving IPTV (multicast) from my ISP (Deutsche Telekom) and it is already working without any issues for the main receiver which is directly connected to my dsl router (AVM Fritz!Box 7390). ...
7
votes
2answers
43k views

Set up permanent routing (Ubuntu 13.04) [duplicate]

I have 2 connections: wlan0 (gw: 192.168.1.1) and eth0 (gw: 192.168.2.1). My default connection is wlan0, but I wanted some websites load through my eth0, so I set up routing for those websites/IPs ...
7
votes
1answer
19k views

Forwarding traffic between 2 interfaces

I have 2 VLANs connected to a 'router'. All the machines can ping other machines within their own VLAN and the router. The router can ping all of the machines. I am trying to get machines to talk to ...
1
vote
0answers
430 views

Permenant Route Addition

I'm trying to add a route permanently to my VPS, at the moment I have to run the command manually every time I find out the server has rebooted. I read somewhere I had to add something to ...
2
votes
3answers
6k views

Trying to enable IPv6 results in a “No route to host” error

I'm configuring a dual stack network on a KVM server using static IPv4 and IPv6 addresses furnished by my provider. I input all addresses, nameservers and gateways as required when installing Ubuntu. ...
2
votes
1answer
2k views

Help configure multiple network interfaces

I'm running Ubuntu inside a VM on my work laptop. I have to run my VPN software on my VM Host system and need access to my VPN network from within my Ubuntu VM. I can set my VM's network interface to ...
8
votes
1answer
14k views

How to route all internet traffic through Tor (the onion router)?

Could you explain how to route all internet traffic through tor? I am using Ubuntu I really don't know how to do it. Actually I am using tor for twitter only, and I'm afraid of DNS leak. So I need to ...
1
vote
1answer
599 views

Ubuntu server routing table

i've a ubuntu server (13.04) with 3 NICs. This is my routing table: Destination Gateway Genmask Flags Metric Ref Use Iface default vodafone.statio 0.0.0.0 UG ...
2
votes
1answer
3k views

Forward TCP Connections with Iptables

I receive connections to my server from several ip addresses I want to route these connections just like rinetd does but based on the ip the connection is coming from to connect to a specified host. ...
1
vote
2answers
3k views

How to control the up order of network interfaces?

I have /etc/network/interfaces as follow. Every time the system boots up, the route is wrong so the gateway is not reachable. I'd have to ifdown br0 && ifup br0 to fix the route table and make ...
0
votes
3answers
106 views

Routing example.com/page to example.com:[port]

I have a server with multiple services running, for example: subdomain.example.com:1234 subdomain.example.com:1235 subdomain.example.com/1236 Accessing these directly will take me to the web gui ...
12
votes
2answers
49k views

How to make IP forwarding permanent?

I know that I can enable IP forward by echoing 1 to /proc/sys/net/ipv4/ip_forward, but how can I make this permanent? By the way I want another method rather than start up scripts, is there any?
2
votes
1answer
2k views

OpenVPN - Routing issue

Server: Ubuntu 11 (Openvz VPS) Client: Windows 7 Issue: clients connect successfully to VPN, but loss of internet access once inside the VPN. Facts: Everything mostly defaults Is a ...
1
vote
1answer
238 views

How to IP forward only between 2 interfaces out of 3 installed?

I'm using ubuntu 12.04. There are 3 NIC on my PC but I wish to do ip forward only on 2 of them that act as a router. The 3rd NIC need to be separated from the other 2 and not be able to see the ...
1
vote
0answers
61 views

why would the system not respect a routing rule? [closed]

We have the following rule in our /etc/network/interfaces file: up route add -net 224.0.0.0/8 dev eth1 If we run route -vne we see it listed: Kernel IP routing table Destination Gateway ...
2
votes
1answer
103 views

Networking and Traffic routing question

Hello I had a few of questions related to networking, let me list them in a logical order: 1) Can multiple interfaces be bridged together so that it results in increased bandwidth? 2) Can wired and ...
0
votes
1answer
722 views

IPv6: ping6 from foreign host works, but cannot ping6 on same host

I have a strange issue with ipv6 on Ubuntu 12.04. There are two hosts, directly connected to the internet. Both have assigned a /64 network. They are properly configured with a /128 endpoint each ...
0
votes
1answer
3k views

Ubuntu as a Router/Gateway - Unable to access WAN

I am currently trying to set up a home router using a machine running Ubuntu 12.04. The machine has two ethernet ports. eth0 is LAN and eth1 is WAN. I have set eth0 to a static ip and have eth1 ...
0
votes
1answer
1k views

How do I configure ufw to only allow outgoing/established connections for a IPv6 network?

How do I configure ufw to only allow outgoing/established connections for a IPv6 network? I am using an old computer with 12.04 installed to create an IPv6 router for my local network. I would like ...
1
vote
3answers
101 views

Why are there 2 routes in this table instead of one?

route -n gives: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.20.254 0.0.0.0 UG 0 0 0 eth0 ...
8
votes
2answers
1k views

How to tell what interface a TCP connection will go out on?

I have a server with multiple ethernet interfaces. What's the easiest way to tell what interface an outgoing TCP connection will go out over? The results of "netstat -rn" is greek to me, so if your ...
3
votes
2answers
792 views

How to find the size of internal routing table efficiently?

I need to know how we can find the size of the kernel routing table. I have knowledge that the routing table is stored in /proc/net/route I am presently using wc to count the number of characters in ...
2
votes
1answer
1k views

Bridge connection: Ubuntu keeps modifying routing table

I have set up a bridge connection from my mobile phone connected via USB to my laptop running Ubuntu 12.04 to another computer connected via ethernet cable. The bridge thus connects usb0 and eth0. I ...
0
votes
2answers
2k views

forward port 80 for multiple IP addresses on the same Ubuntu server

I am using an Ubuntu 12.10 server as a router/NAT for an internal network to the internet. I have also configured the server to forward port 80 to a server sitting on my internal network. This all ...
1
vote
2answers
4k views

how to route 3 NICs and 3 subnets

I am trying to setup routing between 3 subnets using an Ubuntu 12.10 server with 3 NICs. I would like to be able to have all these subnets route between one another as well as be able to access the ...
0
votes
2answers
603 views

An offline-maps application

I'd like to have a software that allows me to download and view (OpenStreetMap-) maps of the whole world or a certain area I chose to download. Ideally, it should behave just like the map-website but ...
2
votes
0answers
409 views

iptables, forwarding between interfaces

I'm trying to setup a router using iptables. But, after a lot of examples I've tried, I can't get anything to work. My idea is to setup a box in between my Cisco and the main switch for firewall, ...
0
votes
1answer
539 views

How to define specific urls like 'localhost'?

The same way 'localhost' in the url points to /var/www/ I would like to put http://courses/somehting/somthing/moresomthings/.... and it would always point to /var/www/courses.php This is to work on ...