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1
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1answer
124 views

Routing 2 ISPs to 2 different networks

Ok, so here is my scenario. eth0 and eth3 point to 2 different ISPs, eth1 is an internal network say on 192.1.1.0 and eth2 is on another network say 10.1.1.0. I want each network to be on their own ...
4
votes
1answer
3k views

Ubuntu Server 12.04 as a router. Problem with DNS?? Or Routing table?

I have a virtualbox lab made up of 4 Windows 2008 R2 servers (DC/DNS,SQL,SHAREPOINT, EXCHANGE) that are configured with static ip addresses with NIC's attached to Internal network. Everything works. ...
2
votes
1answer
787 views

My server does not forward packets between interfaces. What am I missing? [closed]

I'd like to get my Ubuntu 11.04 server to route packet between its two network interfaces. The two ethernet interfaces (eth0, eth1) work apparently well as such. Both have static IP addresses ...
7
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1answer
2k views

How is the loopback device implemented?

The loopback networking interface is a virtual network device implemented entirely in software. But how is this implementation actually accomplished and how do you manipulate it? As far as ...
15
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3answers
74k views

How to set static routes in Ubuntu Server?

I have used Ubuntu since Ubuntu 8.10; today I'm working with Ubuntu 12.04 Server. I am having difficulty keeping static routes on booting. I would usually put the route commands /sbin/route add ...
0
votes
2answers
468 views

New install 12.04 64bit dual NIC's, both DHCP, no route until one card disabled [closed]

Fresh install on Asus P7T deluxe. Which has twin NIC's onboard. Both cards have cables attached to a switch with IP's from DHCP and a valid route to the internet. Internet connectivity fails until ...
0
votes
2answers
1k views

Computer becomes unreachable on lan after some time

I work on my laptop and ssh into my desktop. I use a lot of key based authentication for many servers for work but recently I couldn't login because ssh would pick up and try all the keys and it stops ...
1
vote
1answer
127 views

How can I make sure my server is connecting through my router?

I have a Ubuntu server with PHP, Apache2 and all of that setup and working on my LAN. Meaning from any computer connected to the same router I can connect to 10.0.0.3 (My server). I have setup my ...
0
votes
1answer
2k views

Operation times out trying to SSH outside LAN i.e. from internet to LAN no connection is established

I run Ubuntu 12.04 and have no success connecting with SSH from "Internet". The router is a TL-MR3420 which is set up to forward requests to one of the NIC's on ubuntu machine (which has in total 3 ...
0
votes
1answer
558 views

Unable to ping et1 - routing issue

I have an UBUNTU server VM installation with two NICs. eth0 is on the LAN network, configured by DHCP and is working fine. I manually configured eth1 with a static IP on the DMZ network but can't ping ...
3
votes
0answers
846 views

How can I tell Ubuntu to keep the correct routing table?

Ubuntu sets a wrong routing table if the router is switched off and on again: Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.1.1 0.0.0.0 ...
0
votes
1answer
152 views

Ports misbehaving - Closed but they are opened

I have an interesting problem for you. I have a few ports that I opened up. On my router and I allowed then on my firewall too with sudo ufw allow 30999. But still the application which would use ...
0
votes
1answer
6k views

DHCP server not routing to connect to internet for clients

i am configuring a DHCP server using ubuntu 11.10 with 2 lan cards.eth0 is connected to wan on ip address:192.168.2.2/24 and eth1 connected to lan is configured with ip:192.168.10.1/24 ...
0
votes
2answers
2k views

How to make an internet server as firewall using ubuntu 11.10

i have one static broadband connection which is coming to my Ubuntu server with 2 lan cards, there are 10 more PC's to which i need to provide internet connection through Ubuntu server as well as i ...
1
vote
1answer
522 views

How to set iphone tethering interface as default gateway

I am able to do the iphone usb tethering under ubuntu(11.10) which will be recognized as eth1 interface (I also have an eth0 internet connection). What I want to do is, when the eth1 is up, I want ...
0
votes
1answer
692 views

How do I replace a cable modem router with my own server as DHCP?

My ISP gave me a really crappy router-modem-combination that lacks basic features. For instance you can't assign a constant ip to the mac adress of a client PC. I run a server for my home ...
4
votes
1answer
16k views

Two Network cards and ip forwarding

I want to make "Ubuntu 11.10" act as a router. I have two LAN interfaces. Let's say interface A' IP is 172.16.1.10 ; interface B's IP is 192.168.1.10. How can I configure Ubuntu so that ...
1
vote
1answer
3k views

ssh fails because port 22 doesn't work with AT&T Uverse

I am attempting to ssh into my home laptop (lappy) from my work laptop (lappy2) so I can run things, transfer files, feel good about having the skillz necessary to set up a server, etc. I have told ...
1
vote
1answer
4k views

Using Ubuntu as a router?

I've seen many tools to use Ubuntu as a router in which an internet connection could be shared from Ethernet over Wifi or vice versa. I'm looking to achieve this except with 2 Ethernet connections: ...
3
votes
2answers
5k views

How to set routes for my vpn connection

In my previous question I was asking about setting up vpnc connection. I've installed network-manager-vpnc so now I can configure all this stuff right from network manager gui. I have got this pretty ...
2
votes
2answers
603 views

route table explanation

I'm a newbie. Recently I used the command ip route ls to print my route table. Here is the content: 111.211.3.192/26 dev wlan0 proto kernel scope link src 111.211.3.205 metric 2 I'm curious about ...
5
votes
1answer
13k views

Understanding my route table

this isn't programming at all, but I've seen related topics so I thought why not. I am using ubuntu and currently trying to learn basic networking. I read a lot of theory, so I understand the terms ...
1
vote
1answer
2k views

Ubuntu can't configure proper gateway at boot

My Ubuntu machine is connected to internet via wifi, and also connected to LAN by ethernet cable. Every time I log on, I have to run these 2 commands in order to set the proper gateway (wlan0 in my ...
2
votes
1answer
4k views

When I try to add repositories, why are ubuntu's keyservers timing-out?

Something is rendering receiving keys from keyserver.ubuntu.com impossible and I'm not even sure where to begin in trying to resolve this. As an example, we'll use the Spotify linux app found here: ...
1
vote
0answers
129 views

How to set nic priority? [duplicate]

Possible Duplicate: To allocate data usage efficiently with two internet connections I have a wifi dongle as well as a very slow POE wired connection going to my Ubuntu box. I want the Wifi ...
6
votes
2answers
3k views

Connecting to other LAN computers using their names [duplicate]

I have a LAN at home with my desktop and my laptop. IP addresses are allocated dynamically to both, so the IP number keep changing. I try to connect from one to the other using places->Server, and in ...
0
votes
4answers
2k views

Configuring my router

I need to configure my router so I can access the website I have running on my computer from the outside world. How can I do this? I think I need to open the port 80 on the router, which gets ...
6
votes
2answers
15k views

Default gateway changing

I am using 3 ethernet interfaces on Ubuntu but when I restart, the default gateway is changing to a different interface. Each time I boot I have to change default gateway back to the eth1 by deleting ...
-3
votes
4answers
709 views

To same computer Remote desktop thrue WRT54G router [closed]

To be sure connection is working i want to connect to same computer from same computer ive set up remote desktop. Can't access from my Same comp to same comp to test if all is ok. Tried all mentioned ...
5
votes
1answer
2k views

Hybrid wireless network repeating

Summary: I'd like to use two Ubuntu computers to extend/compliment an existing wireless access point. I have a network which currently looks a bit like this: What the diagram doesn't show is the ...
5
votes
3answers
5k views

Use two networks at the same time?

I want to use Ubuntu 10.10 Server in a classroom, a computer lab whose bandwidth is provided by a local cable ISP. That's no problem, though the school network has an IP printer that I want to use. I ...
7
votes
2answers
3k views

Sharing an internet connection through the Ethernet port

I have a small living room PC (Bohica, running fully-updated Ubuntu 10.10/Maverick) connected to my HDTV that I use for web browsing and media streaming. It connects via WiFi (wlan0) to my Fedora ...
2
votes
1answer
4k views

How do I setup routing through a PPTP VPN?

I have created a PPTP connection back to my office, and managed to setup routing as suggested in this question, so that everything outside the office LAN keeps going to my current default gateway. ...
4
votes
2answers
11k views

How to setup multiple WANs with load balancing?

What is the best way to setup multiple WAN's into a Ubuntu distro and load balance? I have two internet connections, one static and one dynamic and I need to combine and load balance them. I have been ...
15
votes
2answers
17k views

How to set up dual wired and wireless connections?

My laptop has both wireless and a wired connection capabilities. Can I connect to a router A using wireless and a separate router B using wired ethernet at the same time without having to switch back ...
2
votes
1answer
2k views

Weird issue with iptables redirection

I am trying to redirect all incoming traffic on UDP port 5060 to port 56790, and all outgoing traffic from 5060 to the port 56789. I used these iptables rules: iptables -t nat -I PREROUTING -p udp ! ...
1
vote
1answer
1k views

How to configure a second IP address and bind it to a VBoxHeadless virtual machine?

I've requested my ISP to dedicate me a second Internet IP address and have got it. Now I need to configure it (I've never had any experience with using multiple IP addresses on one network interface) ...
1
vote
2answers
143 views

Are there any packages in Ubuntu that allow routing on application layer level?

I would like to route packages received by a VM host to different VM guest, on basis of application layer, in particular domains given in urls. It is impossible to route on network layer level, since ...