a device that connects to 2 or more networks and is capable of forwarding data packets into the direction of the ultimate destination based on information read from the packet and internal routing tables.

learn more… | top users | synonyms (1)

5
votes
3answers
1k views

Can internet gateways be plugged straight into a layer 2 switch?

tl;dr Internet gateways (eg., cable modems, fiber optic gateways) don't function properly when they aren't behind a device with "layer 3" or routing capabilities, correct? Incredibly long backstory ...
0
votes
1answer
117 views

Keep router interfaces isolated

Have a Cisco Router 2811 with a HWIC that gives it an extra port so I have 3 Ethernet ports. Have it configured like this: FA0/0- 192.168.1.1 FA0/1- 192.168.10.1 FA1/0- 10.0.0.1 (outside) All that ...
1
vote
1answer
1k views

Shouldn't we exclude a static IP from the DHCP pool?

In my office, I have a printer with static IP 192.168.0.254/24. Normally, it should be excluded from the DHCP pool in the router. So I just set the DHCP pool to be in the range of 192.168.0.2/24 - ...
1
vote
1answer
49 views

VLAN, possible to do this?

I have a Cisco RV110W small buisiness router. Here is a demo of what the administration interface/options: https://www.cisco.com/web/sbtg/gui_mockups/RV110W/default.asp.htm I have 3 devices connected ...
1
vote
1answer
186 views

Automatically ask router for port redirection on ubuntu

Is there a way to use uPnp or something to automatically ask a router/firewall to redirect data coming from outside to a machine running ubuntu? Here's the deal, I'm supposed to prepare a certain ...
-3
votes
1answer
258 views

how publish multi web site with Same port 80 in multi inside web server with cisco router?

I have a problem in publish Multi web Site in multi web server with a single Public IP and all of these Web Sites use Same default port of 80 but have different URL address . I want publish all of ...
0
votes
1answer
78 views

Can a home router separate private network? [closed]

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 ...
0
votes
0answers
23 views

Getting data to correct computer [duplicate]

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? ...
0
votes
2answers
254 views

What ISP needs to provide in order to route native IPv6 /56 range to several VLANs

I have a theoretical question. Network topology is like this: ISP <--- eth0 -> Router1 <- eth1 ----+--> VLAN1 '--> VLANx For the sake of ...
0
votes
1answer
142 views

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 ...
0
votes
1answer
180 views

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 ...
0
votes
0answers
47 views

Router Advertisement loopback

I have a machine acting as a router. To send out router advertisements it is running radvd. IPv6 enabled. When an interface is enabled (e.g. a link-local address is set) radvd will sent to all nodes ...
0
votes
2answers
2k views

Why can't I have the same subnet on WAN and LAN?

I want to know why same IP with same mask on both WAN and LAN side could be a problem. I also want to know if setting different mask, but having same IPs will resolve the routing problem. ...
1
vote
0answers
397 views

Creating a multi-wan/isp failover router where wan IPs are dynamic on Debian

I'm having an incredibly hard time creating a basic router on Debian which has connections to two ISPs where the ip addresses are dynamic. I don't need bonding, I really just need some way to detect ...
-2
votes
1answer
122 views

How does one configure an Avaya 4524GT switch to work as an fibre to ether adapter?

I have an Avaya 4524GT routing switch, which has some fibre ports and some ordinary ethernet ports. I want to internally bridge one particular ethernet port to one particular fibre port, so that the ...
0
votes
0answers
353 views

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 ...
0
votes
2answers
90 views

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?
2
votes
1answer
80 views

Why is a remote IP redirecting to a local server?

I've got a rack full of Linux servers that host OpenVZ containers and for some reason when I attempt to connect to a certain remote IP from inside a few of the OpenVZ containers (using telnet, for ...
1
vote
2answers
129 views

How Can You Tell If IPSec Is Installed on Cisco

How can I tell if my Cisco router has IPSec installed? I went into configuration mode to see about setting up a crypto policy, but the 'crypto' keyword isn't available. Is this an indication that it ...
1
vote
0answers
60 views

View Logs - HP Router

I have a HP MSR30-10 A router at the edge of our network. The rest of our switches are HP, but it turns out the the HP router comes from the old 3Com world and speaks a different language from the ...
3
votes
1answer
79 views

MPLS: choice of initial label for an incoming packet

At the entry of a MPLS tunnel, which packet fields are used to determine the label of an incoming packet? Here it says that there are other attributes that are taken into account besides the IP ...
0
votes
3answers
83 views

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 ...
0
votes
0answers
71 views

How to setup metric for routers on CentOS DHCP server

I have a simple DHCP server running on CentOS 6 with the following configuration: subnet 192.168.1.0 netmask 255.255.255.0 { allow booting; allow bootp; ddns-update-style none; range ...
1
vote
1answer
233 views

Access web server on VM from a machine in a different subnet

I cannot access to a web application running on a virtual machine hosted by KVM from a machine in a different subnet. So, I would like to access from the machine 192.168.1.2 (top right in green ...
0
votes
0answers
25 views

HP 7102DL Router Invalid Command

We've bought a HP 7102DL Router, and are having some issues with it, this is not new, so has no warranty or returns. Basically, The Device was dead, guessing from previous configs or something like ...
1
vote
2answers
305 views

Router/Gateway with host-header capability

Can anyone direct me what to look for to get a Router / Gateway / Firewall for my home-office enviroment to be able to run multiple e.g. Webserver on port 80, with one public ip. I know it can be done ...
0
votes
2answers
151 views

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 ...
1
vote
1answer
32 views

Increase dialup connection speeds

I'm currently manage a p2p dialup network like this: client computer==(ethernet)router Cisco 2500==(async port)modems----pstn----modem==dial-in server All things run well except the connection rates ...
2
votes
2answers
145 views

Colocation, Full Rack, Layer2/Layer3 Clarification

We are moving from several 1U servers colo'ed out across several data centers to a full rack in a nearby data center for both physical access reasons, as well as having space for expansion. We also ...
0
votes
1answer
411 views

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 ...
0
votes
1answer
62 views

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 ...
0
votes
2answers
54 views

Why does the same router picks different routes based on source ip? [closed]

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 ...
1
vote
2answers
109 views

Centos TFTP boot server without a dhcpd server

Good Day, I want to ask the comunity if it is possible to setup a TFTP boot server without running a local dhcpd server on the local box? The setup currently looks like this? What is currently ...
0
votes
2answers
89 views

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
-4
votes
3answers
6k views

Blocking WhatsApp and other IM traffic

In my office, I have set up a linux machine as router and provide internet connectivity to all clients. Behind this linux router I have set up a cisco wireless router, with which I have made internet ...
1
vote
2answers
116 views

Cisco 851W - recovering from corrupt configuration

While learning how to use my Cisco 851W router, I downloaded a configuration script with preconfigured settings. I ran this from the router and now I can no longer boot up and get to a command prompt. ...
-4
votes
3answers
140 views

Why first dhcp server not used? [closed]

I have hardware connected to router with DHCP server. That router has MAC reservation to make sure hardware be assigned to specific IP. When this setup isolated everything is fine, but if I connect ...
0
votes
2answers
66 views

Commercial Routers with internal switch [closed]

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: ...
-3
votes
1answer
499 views

Why is Windows 7 not following all routes? [closed]

My computer is connected to my secondary router that's running the 192.168.42.0/24 network and my computer also has a route that directs anything on that network to the router, but for anything on ...
0
votes
1answer
374 views

Access router set up as a bridge behind another router

I have a problem my ISP is refusing to help me with, even though they put up the whole system. Specifications: There's a Thomson TG784 router through which the internet comes in to the building, ...
1
vote
0answers
44 views

Cisco configuration for public library internet

I'm a C/C++ computer programmer turned IT support guy working for a public library. My day is usually spent helping random grandparents learn how to use email, so my networking knowledge is limited ...
-1
votes
1answer
98 views

ZyWALL 2 Plus firewall make NAS public [closed]

How can I configure so that I can have access to my NAS world wide ? I tried different options but none of the combinations went successfully. FROM WAN to LAN - allow any to a specific address from ...
2
votes
0answers
719 views

Wireless router country codes: what issues can these actually cause?

Running the network diagnostics tool on my Mac, I get a messaging about "Conflicting Country Codes" stating that: "A nearby wireless router has been detected which is identifying itself as ...
0
votes
1answer
2k views

Prevent RDP logon brute force in mikrotik router via winbox

Masters, I need help, how to config our router to block RDP brute force attacks I would like to set our router to only allow RDP connection from a specified country (our specified IP ranges), plus i ...
-2
votes
1answer
110 views

Why Might My Office Network Have Two Routers? [closed]

I am no network admin. But I am the in-house IT guy for a small firm with, what appears to be, a fairly complex office network. The network has two routers, the first goes into the network through a ...
-1
votes
1answer
89 views

Is there a simple solution to internal wifi access? [closed]

I'm sure many people have the same issue. Can this be solved easily with standard routers. We have a standard network with lots of PCs, switches and routers. Its a standard PC network with a simple ...
1
vote
1answer
219 views

cisco 2851 router: can't view switch ports

I want to setup vlans on a 2851, but I'm not sure how to access the switch ports. I can access or view them. Is there something I have to enable? I have some devices plugged into the switch ports and ...
-2
votes
1answer
643 views

How do routers combine WAN and LAN traffic (packet data over wifi and ethernet)? [closed]

In my office, we have a leased line connection which is shared by some 20 users over wi-fi. This causes congestion on the router's end, resulting in slow speed due to high packet drops (and consequent ...
0
votes
1answer
310 views

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 ...
0
votes
1answer
47 views

Changing from router DHCP to Server DHCP [closed]

I want to setup a Linux DHCP server instead of a router based DHCP. I'm guessing that I will need to turn off the router DHCP, but keep the router as the gateway. I think that the BCAST DHCP requests ...