the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.

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0answers
80 views

Divert TCP connection

I am trying to divert a TCP connection. Given a client (C) which is connected to a router R and two servers (S1 and S2) are connected to the router, C initially connects to S1. I am trying to write an ...
3
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1answer
2k views

Routes bound to virtual interfaces, Debian, and how to determine specifics, after the fact

I've recently begun a new job, and have inherited an existing infrastructure with a lot of issues. One of the issues is that the previous admin added static routes to some servers, bound to virtual ...
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2answers
737 views

Route ssh traffic based on hostname using FreeBSD/pf?

I have a proxy/firewall machine running FreeBSD 9, using PF to route and filter traffic as needed. Now I'm setting up a git server, which runs over ssh, but I'm already using port 22 for ssh. I would ...
2
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3answers
2k views

Static-to-OSPF Route Redistribution

Is it possible to use redistribution of static-to-ospf in order to create an external OSPF route other than the type E2? Does this process only create a type 5 LSA and can any other LSA types be ...
0
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1answer
80 views

Do sides of a VPN tunnel need IPs set (2 VPN routers connecting virtual LAN)?

Is there a reason to have IPs on terminating sides of a VPN tunnel when connecting, say, 2 remote offices? There is an option to have and an option not to have. Advantages and disadvantages of both ...
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2answers
1k views

linux routing or natting with ip on loopback interface as alias

Ive got eth0:0 192.168.2.10 (for bgp network announce, no vlan, alias on eth0) eth0.1 192.168.3.20 (for bgp session 1,vlan3 transport to bgp router) eth0.2 192.168.4.30 (for bgp session 2,vlan4 ...
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1answer
210 views

split routing with openvpn

I've set up an OpenVPN server on a VPS (ubuntu 11.04) and configured clients (mix of ubuntu 11.10 and 12.04) to use it. After starting the VPN connection on the client, all internet traffic gets ...
2
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1answer
178 views

2 VPN tunnels over 2 independent connections and routing

We used to have 1 VPN tunnel over 1 Internet connection, connecting 2 datacenters into 1 virtual LAN (10.x.x.x). It was very simple with route tables etc. Now that we added another tunnel on the ...
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1answer
336 views

RIP Advertising Networks of EIGRP without Redistributing

This is the topology I have set up in my GNS3. The RIP V2 protocol of Router R2 is recognizing and advertising the two networks that are advertised in EIGRP, even though the said information should ...
3
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1answer
194 views

Connection Drop with Load Balancing over Multiple Uplinks

I have a Server with to uplinks into the Internet. I'm doing load balancing over both uplinks with ip utility from the iproute2 package. ~ # ip route show [...] default nexthop via 217.0.117.212 ...
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1answer
434 views

Automatically setup routing after OpenVPN connection

I'm using Debian 6 as my server, I have configured OpenVPN server there, and clients are connecting successfully using tap mode. This server is available from the internet, but It's also connected to ...
2
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1answer
925 views

Trying to route outgoing http requests through VPN on Ubuntu Server 12.04

I've got an Ubuntu 12.04 server running on Amazon's EC2 that runs a web crawling process. We're running into a problem where some of the webservers hosting the sites we need to crawl are blocking all ...
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2answers
1k views

Connect linux server to VPN server via PPTP

I'm trying to connect a Linux (Ubuntu 10.04 LST) server to a VPN server via the PPTP client to an VPN server. I configured the PPTP client as said in the documentation. The connection is correctly ...
1
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1answer
201 views

Routing SIP between subnets

I've got the following configuration : 2 subnets (we'll call A and B) with IP phones in both. Internet access behind a NAT for each of them, and a routed VPN is set up between those 2 subnets. I am ...
5
votes
3answers
7k views

second ip address on the same interface but on a different subnet

Is it possible in CentOS 5.7 64bit to have a second IP address on one interface (eg. eth0) - alias interface configuration - in a different subnet? Here is the original config for eth0 more ...
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2answers
121 views

How to access an IP address as if on a different network using SSH [closed]

In preparation for a lengthy business trip, I set up my router such that I can access my home computer over the internet via port forwarding over SSH. One thing I neglected to do was setup access to ...
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3answers
2k views

Multiple network cards, controlling where my traffic goes

This is an Ubuntu 12.04 server install. I have multiple network cards, eth0 and eth1 lets call them. eth0 is connected to the internet, and all of my traffic goes through it, until eth1 gets plugged ...
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2answers
383 views

ADD ROUTE command in windows 2008R2

I don't know much about Networking, So excuse me if I am raising some basic issues. I have a LAN where there is a Windows Server 2008R2 with some clients connected to it. The clients are not joined to ...
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1answer
2k views

Routing Traffic on Ubuntu to give Raspberry PI Internet Access [closed]

I'm hoping someone can point me in the right direction for setting up my Linux (Ubuntu 12.04) box to route traffic from eth0 to wlan0. I'll try and explain the problem I am trying to solve: I ...
2
votes
1answer
727 views

Cisco Catalyst 4500 Policy Based Routing

In order to test a new firewall I just set up I'm trying to implement policy based routing on our core switch. I want traffic from certain vlans to be routed to the new firewall while everything else ...
2
votes
2answers
92 views

A tricky converged VoIP design

A client (roughly 30 people) wants to replace their existing analog phone system with VoIP. However: they have dual Ethernet drops to some desks, but not all their (recently purchased) router does ...
0
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1answer
112 views

IP failover for different paths

I have a device (a single-port terminal server that I use to emulate a serial port) that is accessible via two paths: a microwave T-1 (which connects the device to the internal network at my job) and ...
3
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3answers
579 views

identify a router that cuts certain port

Is there a way to identify which particular router between me and some server blocks connections on certain port? I am in a hotel in Thailand, where they have recently changed some settings in their ...
1
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1answer
93 views

Network routing for multiples public ip?

I am using Xen Virtualization for my VM's and everything is going right with bridge mode. I can assign a public Internet ip to each VM. I want to have a VLAN for my VM's and I am thinking about ...
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1answer
363 views

Routing RFC1918 addresses through dd-wrt via a switch

I am a bit stuck with an experiment of mine. I have a network looking somewhat like this. | Internet | | ---- |Switch| ---- | | Server w/pub IP ...
0
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2answers
278 views

Blocking ports on the public IP assigned to lo interface in GNU/Linux

I have setup my Ubuntu server as a router and webserver by following the answer given here. My ISP facing interface eth0 has a private 172.16.x.x/30 ip and my lo interface has a public IP as mentioned ...
2
votes
1answer
248 views

Packet flooding while configuring a Debian L2TP/IPSec client?

I'm currently at my wits end trying to configure an L2TP over IPSec VPN connection on my Debian using openswan and xl2tp box connecting to a server of unknown configuration. I've managed to ...
0
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2answers
1k views

Hosting websites on a public ip routed via a private subnet using one Linux machine as both router and server

I use Ubuntu server as router, NATing router and webserver. The server is connected to ISP with a public /29 subnet. Also I host some important websites on it. I asked the ISP to provide ipv6 address ...
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1answer
109 views

correct routing for multiple devices

I have Debian Lenny machine with 3 interfaces enabled (eth0-2), and I have problems as follow. eth1 is connected to a router and this router has portforwarding for port80. eth2 is connected direct ...
3
votes
1answer
996 views

Configure IPv6 routing

I've got IPv6 addresses from SIXXS. My host is connected with SIXXS network over a AICCU tunnel ("sixxs" interface). My host address is 2001:::2, the host on the end has address 2001:::1. On my host ...
0
votes
1answer
1k views

Allow access to printer between interfaces on Cisco ASA5510

I have a Cisco ASA5510 where we have to separate networks on two separate interfaces. The networks should have nothing to do with each other except that network B needs to access a printer on network ...
0
votes
1answer
611 views

Bringing an IPsec tunnel on the hardware node to the OpenVZ containers

I have a server hosting OpenVZ containers. An IPsec tunnel is configured on the hardware node (HN) and I'd like to make the remote network available in the containers (CT). How can I do this? The ...
0
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2answers
194 views

Iptables DNAT / only one url

I have a rule similar to this: iptables -t nat -I PREROUTING -p tcp --dport 80 -s 192.168.1.5 -j DNAT --to-destination 192.168.1.2:80 which redirects all http requests from 1.5 host to 1.2.. I want ...
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votes
2answers
1k views

Route forwarded traffic through eth0 but local traffic through tun0

I have a Ubuntu 12.04/Zentyal 2.3 server configured with WAN NATed on eth0, local interfaces eth1 and wlan0 bridged on br1 on which DHCP runs, and an OpenVPN connection on tun0. I only need the VPN ...
7
votes
2answers
12k views

Why do ICMP Redirect Host happen?

I'm setting up a Debian box as a router for 4 subnets. For that I have defined 4 virtual interfaces on the NIC where the LAN is connected (eth1). eth1 Link encap:Ethernet HWaddr ...
0
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1answer
2k views

Adding a route via a different subnet on linux

Here's my configuration : IP adress : 192.168.1.4 Netmask : 255.255.255.0 Default gw : 192.168.1.200 Routing table : Destination Gateway Genmask Flags Metric Ref ...
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votes
2answers
207 views

Network traffic across different (sub-)nets, how does the route get determined? [duplicate]

Possible Duplicate: How does Subnetting Work? Imagine there is a small network with 2 subnets. Both of the subnets have their own switch (means: all machines on that subnet share the same ...
4
votes
2answers
252 views

Impact of MTU on IP packet fragmentation and reassembly

Let's say computer S (sender) sends some IP packets to computer R (receiver). Between S and R, there are 6 networks, divided by 5 routers. So the IP packets leave R, go through network 1, pass router ...
2
votes
1answer
1k views

Using Juniper EX3300 as a router [duplicate]

Possible Duplicate: Using the Juniper EX3300 Switch as a router? So I have a Juniper EX3300 Switch. One of its uplink ports (ge-0/1/0) is connected to my ISP's router. ISP router's port ...
8
votes
4answers
2k views

Multi-WAN bonding across different media

I've recently been thinking again about a product that Viprinet provide, basically they've got a pair of routers, one that lives in a datacentre, Their VPN Multichannel Hub and the on-site hardware, ...
0
votes
2answers
161 views

VLAN across a router to give wireless access to remote sites?

I've been looking online for this answer, but getting conflicting information. I was under the impression that you couldn't use a VLAN across a router, but maybe it's possible (according to some ...
10
votes
1answer
387 views

Network Restructure Method for Double-NAT network

Due to a series of poor network design decisions (mostly) made many years ago in order to save a few bucks here and there, I have a network that is decidedly sub-optimally architected. I'm looking for ...
1
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1answer
274 views

Routing between two OpenVPN tunnels fails

We have three sites A, B an C. There is an OpenVPN link from A to B and from A to C. A is the client for both. Bnet Cnet | | B C \ / \ / V A | Anet Anet can communicate with ...
1
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2answers
311 views

IPv6 connections routed to IPv4 device

I have an IBM 9406-250 with V5R1 and IPv4 only connectivity, and want it to be reachable over IPv6. I cannnot install an IPv6 stack on it, but I want it to be accessible by IPv6 so I can drop the ...
1
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1answer
198 views

How to force a host to not send a broadcast for an IP address in its own subnet?

For a LAN, instead of a switch, I have built a topology where each machine is connected to a router. Each host is assigned an IP address from 10/8. Here are the interface details: Lets say I ping ...
1
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1answer
1k views

Configuring ipv6 over radvd using sixxs, routing not working

So this morning, I have been trying to configure IPv6 upon my network using the guide I found on reddit (of all places) at http://ipv6friday.org/blog/2012/06/ipv6-enabling-training/. Now at first ...
3
votes
3answers
8k views

Routing WIFI and LAN for specific traffic

I have two network devices aboard my macbook pro: WIFI (en1): Used for general traffic. Connects to an ip of 192.168.19.* via DHCP LAN (en0): Used for specific traffic. Connects to an ip of ...
5
votes
3answers
4k views

How to prevent asymmetric routing with multiple eBGP routers?

I have 2 routers announcing a /22 subnet to different providers (one providers connects to each of the 2 routers). I have split the /22 in two /23 to announce one /23 on each of the routers plus the ...
3
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1answer
667 views

selective routing through a VPN tunnel

The problem: after establishing an IPsec VPN tunnel all traffic is routed to the remote endpoint, while I only need to route the packets destined to that internal network and still be able to access ...
0
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1answer
253 views

NAT ing to port 80 not working,when request comes to itself

We have a machine with Virtual Machine with local IP NAT ed to Public IPs. When a request comes to public IP on port 80 it will be redirected to VM with local IP. This is the iptable rule we are ...