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Questions tagged [router]

A device that connects two or more networks and is capable of forwarding data packets to a destination based on information contained within a packet and internal routing tables.

Routers are devices that connect networks and make decisions on where to send incoming data packets, based on the address information contained in the packet and internal routing information.

The most common form are SoHo routers, which connect home or small office networks to the internet and provide routing for all devices on the home/office network. More advanced routers connect large office networks, and at the high end of the scale routers connect large segments of telecommunication networks all over the world at high speed.

Routers are not limited to TCP/IP networks, they can be found in any kind of network.

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Can a home router separate private network?

I've just come across this network diagram: http://computer.howstuffworks.com/router1.htm And I am thinking if it can be done with a typical home router. Normally for home router, when we plug a computer to one of its ports it will be DHCP-assigned…
bobo
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Getting data to correct computer

So I have taken some networking classes and there is still something that I do not understand thoroughly. How does google (or any external web server of any kind) get data back to the right computer? And to be more specific, imagine this scenario: I…
Dan Drews
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Port forwarding doesn't work internally

I've got a machine configured to run a webserver on port 8080. That's all the machine is required to do, but it is possible that the website will be visited by the machine it's self (inside the routers LAN). If i try to visit the routers external…
Ben Ford
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Can I use iptables, Shorewall and ipset on the same time?

I'm using iptables for years, because it is a straightforward solution without any magic. But now I'm building a router for myself, I found there are many useful features provided by Shorewall. Is it possible to use iptables and Shorewall on the…
比尔盖子
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RRAS behind Ubiquity EdgeMAX drops PPTP tunnel

I have a Server 2008 R2 machine behind an Ubiquiti EdgeMAX router. The router has been configured as a NAT, and all GRE traffic along with the TCP control port (1723) has been forwarded to the internal RRAS server. Previously, I had the same setup…
Cellivar
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Cisco IPSec Hardware Requirements

In order to use IPSec on 2811 and 2651XM Cisco routers, does one need any particular hardware module(s) or just the appropriate software?
THE DOCTOR
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Can I set up port forwarding to emulate not just a port but another IP address?

I am running a proprietary Windows application which functions like a server. You install the program, and then it broadcasts itself over port 13083. The program is web-based, so it's accessed entirely through the browser. If I enter…
soapergem
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How can I route or bridge vlan properly with linux router?

I have a linux router (Centos 6) that I built. It has eth3 and wlan0 bridged together as br0. I have not been utilizing vlans up to this point. I have a wireless AP that is tagged vlan 42 for a guest SSID that I want to isolate from the rest of the…
danielj
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How to forward traffic to VPN device

I have set-up OpenWRT in a virtual machine which acts as a router. It has two network interfaces: br-lan: connected to vm internal network eth1: connected to internet through host via NAT I have also set-up a DamnSmallLinux (DSL) VM which has…
TomSelleck
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Linux block access to router login page

I am running virtual machines with Gnome desktops on Debian Squeeze and Wheezy. The virtual machines are on a different subnet than the host. I would like to block the virtual machines from accessing the router/firewall login page via Firefox, but…
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Why does the same router picks different routes based on source ip?

I'm pinging the same IP in two different PCs with two different ISPs. With one ISP, I get a reply, with the other I do not. When running tracert to the IP, I see that with both ISPs that the packet is going through the same router at one point. At…
Uri
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How to connect more than one telnet session to Cisco router ( Port Com10 )?

I am working on connecting more than one telnet session to Cisco Router. I was unsuccessful till now and decided to post it for getting any valuable directions and info. Thanks
Subiah R Nagarajan
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Commercial Routers with internal switch

I often confuse "commercial" routers (which include switching, dhcp, firewall, etc. functionality) with "academic" routers (strictly layer 3). My question can be summed up in the following image: Are commercial routers (let's say for example a…
Zach
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Packet Filter configuration to restrict traffic to the local host

I have been running a pf based filtering router on OpenBSD 4.3 for about a year now. My current task is to set up a new network segment for hosting our external sites. My aim is that machines set up in this network segment should not have any more…
Michael Shaw
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HP MSR 30-10a Router - Route Traffic over Default Route

We have a brand new HP MSR 30-10a Router. We have a fairly simple routing situation - we have two IP blocks, one which has a route out. We need things on the first block to go through the router, and out. I have an old Cisco 2801 router doing the…
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